NAVFEST provides the U.S. Department of Defense (DOD) and industry partners the opportunity to test and evaluate products and solutions in real-world GNSS-contested conditions to enhance systems’ robustness and resilience in these environments.

VectorNav’s evaluated its solutions in GNSS-contested scenarios to continue advancing its capabilities for robust position, navigation and timing (PNT). The VectorNav team tested a variety of systems on both aerial and ground-based platforms and conducted both static and dynamic maneuvers.

During the event, VectorNav evaluated a variety of its single and dual-antenna GNSS-aided inertial navigation systems (INS) products, including the VN-210, VN-310, VN-210-S, VN-200, VN-300, VN-210E and VN-310E in various configurations. Additionally, these products were tested in combination with a variety of additional PNT systems, including external tactical and navigation grade IMUs, M-Code GPS receivers, anti-jam antennas, commercial L1/L2/L5 GNSS receivers in varied configurations and low-Earth orbit (LEO) satellite receivers.

The data collected from the event are being analyzed to further refine and improve the company’s solutions in GNSS-contested environments.

<p>The post VectorNav participates in USAF PNT test first appeared on GPS World.</p>

SURVEYING & MAPPING

Laser Scanning Measurement System
Compatible with specialized kits

The LS300 3D laser scanning measurement system utilizes simultaneous localization and mapping (SLAM) technology and advanced real-time mapping techniques. The LS300 3D operates autonomously, independent of GNSS positioning, making it ideal for harsh conditions in both indoor and outdoor environments.
LS300 includes a 120-meter working range and a sampling rate of 0.32 million points per second. Its point cloud accuracy is designed to perform in low reflectivity extended-range mode. The system is compatible with specialized kits, including the handheld form, back kit, car mount, and UAV kit.
By using data processing software specifically designed and developed for the LS series, users can handle large volumes of point cloud data and simplify complex tasks, including point cloud denoising, point cloud splicing, shadow rendering, coordinate transformation, automatic horizontal plane fitting, automatic point cloud data report generation, forward photography, and point cloud encapsulation.

During data post-processing, users can input absolute coordinates of control points, allowing these control points to adjust the data and improve scanning data accuracy. The LS300 incorporates a redundant battery design with two hot-swappable batteries, designed to prolong operation without frequent charging or interruptions.
ComNav Technology, comnavtech.com

Anti-jamming receiver
A jamming protector for legacy receivers

The KV-AJ3 tri-band anti-jamming receiver combines a digital antenna control unit (DACU) and a GNSS receiver. KV-AJ3 can be used as a jamming protector for legacy receivers or as a stand-alone GNSS receiver solution.
The tri-band solution decreases interferences from up to three directions in three frequency bands, including S-band. This approach is designed to provide significantly higher protection against interference compared to single-frequency devices.
The receiver has a digital port for navigation data output. Jamming-free RF signals can also be delivered to external non-protected GNSS receivers to obtain position, velocity, and time.

KV-AJ3 contains a MEMS inertial sensor, which allows for GNSS-aided INS solutions where coordinates and attitude angles are required.
Kosminis Vytis, kosminis-vytis.lt

Lidar sensor
Designed for high-speed airborne missions

The VUX-180-24 offers a field of view of 75º and a pulse repetition rate of up to 2.4 MHz. These features – in combination with an increased scan speed of up to 800 lines per second – which makes the VUX-180-24 suitable for high-speed surveying missions and applications where an optimal line and point distribution is required.
Typical applications include mapping and monitoring of critical infrastructure such as power lines, railway tracks, pipelines, and runways. The VUX-180-24 provides mechanical and electrical interfaces for IMU/GNSS integration and up to five external cameras.
This sensor can be coupled with RIEGL’s VUX-120, VU-160, and VUX-240 series UAVs. The system is available as a stand-alone sensor or in various fully integrated laser scanning system configurations with IMU/GNSS systems and optional cameras.
RIEGL, riegl.com

UAV detection technology
A 3D data fusion engine for complex environments

SensorFusionAI (SFAI) is a sensor-agnostic, 3D data fusion engine for complex environments. It accommodates all common UAV detection modalities, including radiofrequency, radar, acoustics, and cameras.

SFAI allows third-party C2 manufacturers to integrate SFAI into its C2 systems. This integration can be achieved through a subscription-based software-as-a-service (SaaS) model, enhancing system performance.

Key features of SFAI include behavior analysis to track an object to determine classification and predict trajectory; threat assessment that determines threat level based on a range of data types; and an edge processing device called SmartHub for reduced network load and high scalability.
DroneShield, droneshield.com

Thermal mapping solution
Designed for UAVs

The PT61 camera is a thermal mapping solution for UAVs. The camera system provides detailed thermal orthomosaic maps and accurate 3D models. Developed in partnership with Agrowing, the PT61 is a versatile tool designed for multispectral data collection in renewable energy and other domains.
The PT61 combines a 61-megapixel camera with integrated thermal imaging capability. It can also switch between RGB and multispectral modes, which aims to increase its versatility and address the increasing need for comprehensive data acquisition in various industrial and environmental applications.
Integrated with Agrowing’s multispectral lenses, the camera offers detail across 10 spectral bands and an infrared band, making it ideal for solar plant inspection and dam management.
The enhanced Topodrone post-processing software complements the hardware by streamlining remote sensing tasks, ensuring surveyors and researchers can achieve high levels of efficiency.
Topodrone, topodrone.com

OEM

Dual-band GNSS receiver
Achieves 50cm position accuracy without correction data

eRideOPUS 9 is a dual-band GNSS receiver chip that achieves 50cm position accuracy without correction data. eRideOPUS 9 is designed to provide absolute position information and can be used as a reference for lane identification, which is essential for services such as autonomous driving. It also serves as a reference for determining the final self-position through cameras, lidar, and HD maps.

The eRideOPUS 9 supports all navigation satellite systems currently in operation, including GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC. It can also receive L1 and L5 signals. The L5 band signals are transmitted at a chipping rate 10 times higher than L1 signals, which improves positioning accuracy in environments where radio waves are reflected or diffracted by structures, such as in urban areas — a phenomenon known as multipath.
A dual-band GNSS module incorporating eRideOPUS 9 is being jointly developed with Alps Alpine Co. and is scheduled for future release as the UMSZ6 series.
Furuno Electric Co., Furunousa.com

Lidar scanning module
Designed for OEM integration

The VQ-680 compact airborne lidar scanner OEM is designed to be integrated with large-format cameras or other sensors in complex hybrid system solutions.
It can be mounted inside a camera system connected to the IMU/GNSS system and various camera modules through a sturdy mechanical interface. The VQ-680 has laser pulse repetition rates of up to 2.4 MHz and 2 million measurements per second.
The VQ-680 is ideal for large-scale applications in urban mapping, forestry, and power line surveying. With a field view of 60º and RIEGL’s nadir/forward/backward (NFB) scanning, the system offers five scan directions up to ± 20º.
RIEGL, riegl.com

INS
A product for avionic applications

The ADC inertial navigation system (INS) is designed to calculate and provide air data parameters, including altitude, air speed, air density, outside air temperature, and windspeed for avionic applications.
ADC’s compact form simplifies integration into existing UAV systems with strict size and weight requirements. The INS calculates the air data parameters using information received from the integrated pitot and static pressure sensors, along with an outside air temperature probe.
This compact device consumes less than one watt of power. It is designed for demanding environments, has an IP67 rating, and integrates total and static pressure sensors to calculate indicated airspeed accurately. ADC supports aiding data from external GNSS receivers and ambient air data, enhancing its precision in a variety of flight conditions.
Inertial Labs, inertiallabs.com

Two tactical-grade IMU
With L5 capabilities

The VN-210-S GNSS/INS combines a tactical-grade inertial measurement unit (IMU) comprised of a 3-axis gyroscope, accelerometer, and magnetometer with a triple-frequency GNSS receiver. The integrated 448-channel GNSS receiver from Septentrio adds several capabilities, including L5 frequencies, moving baseline real-time kinematics with centimeter-level accuracy, support for Galileo OSNMA, and robust interference mitigation.

These capabilities and high-quality hardware offer improved positioning performance in radio frequency-congested and GNSS-denied environments.
The VN-310-S dual GNSS/INS leverages VectorNav’s tactical-grade IMU and integrates two 448-channel GNSS receivers to enable GNSS-compassing for accurate heading estimations in stationary and low-dynamic operations. The VN-310-S also gains support for OSNMA and robust interference mitigation, offering reliable position data across a variety of applications and environments.

The VN-210-S and VN-310-S are packaged in a precision-milled, anodized aluminum enclosure designed to MIL standards and are IP68-rated. For ultra-low SWaP applications, VectorNav has introduced L5 capabilities to the VN-210E (embedded) when using an externally integrated L5-band GNSS receiver.
VectorNav, vectornav.com

Real-time INS
Used in large fleets

The Atlas inertial navigation system (INS) is designed for autonomous vehicles, mapping, and other applications. Atlas provides users with ground-truth level accuracy in real-time, which can streamline engineering workflows, significantly reduce project costs, and improve operational efficiency.
Atlas is designed to be used in large fleets. It integrates a highly accurate, low-cost GNSS receiver and IMU with the Polaris RTK corrections network and sensor fusion algorithms. The company aims to make it easier for businesses to equip their entire autonomous fleets with high-accuracy INS.
The system features a user-friendly interface, on-device data storage, and both ethernet and Wi-Fi connectivity. Field engineers can easily configure and operate Atlas using smartphones, tablets, and in-car displays.

Atlas can be used in a variety of sectors, including autonomous vehicles, robotics, mapping, and photogrammetry. Its real-time capabilities and affordability can enhance the widespread deployment of ground truth-level location in fleet operations.
Point One Navigation, pointonenav.com

UAV

USV
For autonomous bathymetric surveys

The Apache 3 Pro is an advanced compact hydrographic unmanned surface vehicle (USV) designed for autonomous bathymetric surveys in shallow waters. With its lightweight carbon fiber hull, IP67 rating, and semi-recessed motor, the Apache 3 Pro offers exceptional durability and maneuverability.

The Apache 3 Pro uses CHCNAV’s proprietary GNSS RTK + inertial navigation sensor to provide consistent, high-precision positioning and heading data even when navigating under bridges or in areas with obstructed satellite signals. The built-in CHCNAV D270 echosounder enables reliable depth measurement from 0.2 m to 40 m.
The USV is equipped with a millimeter-wave radar system that detects obstacles within a 110° field of view. When an obstacle is encountered, the USV autonomously charts a new course to safely navigate around it. The vessel uses both 4G and 2.4GHz networks to facilitate effective data transfer.

Even with a fully integrated payload, the USV can be easily deployed and controlled by a single operator in a variety of environmental conditions.
The Apache 3 Pro ensures reliable communications through its integrated SIM and network bridge with automatic switching. It also features seamless cloud-based remote monitoring that offers real-time status updates to enhance control and security. Its semi-recessed brushless internal rotor motors minimize drafts, which can improve the USV’s maneuverability in varying water depths.
CHC Navigation, chcnav.com

Anti-jamming receiver
Provides stable navigation in three frequency bands

KV-AJ3-A provides a stable navigation signal in three frequency bands, including S-band, even in the presence of jamming and other harsh conditions. The technology is MIL-STD compliant and meets the EMI/EMC requirements for avionics.

The direction of interfering signals is determined using a phased array antenna, which can then remove jamming signals from up to three directions. The original signal is either restored and delivered to external GNSS receivers or processed by the internal receiver to obtain position data.
The key components of this anti-jamming device are based on custom ASICs that allow users to achieve high jamming suppression and SWaP. KV-AJ3-A can be used for fixed installations and land, sea, and air platforms, including UAVs.
Kosminis Vytis, kosminis-vytis.lt

Development kit
With anti-jamming and anti-spoofing capabilities

This eight-channel, CRPA, anti-jamming development kit is a set of instruments designed to help users add anti-jamming and anti-spoofing capabilities to their receivers.
The main development tool is NT1069x8_FMC — an eight-channel receiver board. The eight coherent channels are based on NT1069, the RF application-specific integrated circuit (ASIC) that supports a high dynamic range of input signals.

Each channel performs amplification, down-conversion of GNSS signal to intermediate frequency (IF) and subsequent filtering and digitization by 14-bit ADC at 100 MSPS.

The board is compatible with GPS, GLONASS, Galileo, BeiDou, NavIC, and QZSS signals in the L1, L2, L3, L5 and S bands. Each RF channel has an individual RF input with the option to feed power to an active antenna.

The board also has an embedded GNSS receiver and an up-converter, or modulator, which can provide connection to an external GNSS receiver.
Kosminis Vytis, kosminis-vytis.lt

<p>The post Launchpad: Lidar scanners, OEMs and anti-jamming receivers first appeared on GPS World.</p>

IN THE ARCTIC

Wave Buoys Help Study Arctic Climate Change

Where the edge of Arctic ice transitions to open water, towering seas are smashing sea ice into melting pieces, with far-flung effects on climate and nature. Over recent decades, the Arctic has warmed more than any other region, leading to a significant reduction in sea ice volume. The combination of increased ice-free area and more mobile ice cover has led to the emergence of a seasonal marginal ice zone (MIZ) in the Beaufort Sea, north of Prudhoe Bay, Alaska.

The United States Office of Naval Research conducted a five-year study of the MIZ, which included intense field work in the freezing Arctic sea. Here, the ice is vulnerable to ocean surface waves that form in the open water, resulting from strong winds and frequent storms. Also studied were in-ice waves, where ice and water clash. The goal was to understand how both factors impact the ice floe melting.

Autonomous ocean flux buoys integrate SBG Systems’ miniature inertial sensors. (Photo: SBG Systems)

The MIZ lies in the subarctic seas in winter and transitions into the interior of the Arctic Basin in summer. To investigate the MIZ’s dynamics, ONR engaged an international program of observations and simulations using several autonomous systems, including wave buoys. The wave buoys — officially designated the autonomous ocean flux buoys — integrate SBG Systems’ miniature inertial sensors.

The MIZ study comprised an international team of scientists from more than a dozen organizations.

Buoys for All Seasons. The program included 20 buoys deployed in the summer, and five in the winter, to quantify open ocean and in-ice wave characteristics and evolution. “We needed a very rapid and cost-effective solution to measuring directional wave spectra in the ocean,” said Martin Doble, oceanographer at the French UPMC School and member of the research program. “Time to deployment was very short, so an integrated solution, giving us good heave numbers straight out of the box, was essential. Delivery time of the units was also critical.”

Drilled into the ice, the summer buoys were powered with solar panels and equipped with SBG Systems’ IG-500A miniature attitude and heading reference system to detect both distant and near-wave effects on the local ice floe. Once the ice melted, the summer buoys continued to measure open ocean characteristics.

Five winter buoys were installed on the ice. These buoys were made of aluminum for better resistance and contained enough battery power to keep them going through the dark winter months. Every buoy also contained processing and control electronics, an SD card, a GPS receiver and an Iridium satellite modem and antennas to transmit the recorded data to its base station. Both summer and winter data from the buoys were used to quantify the wave attenuation rate.

Winter buoy installed on an ice floe. (Photo: SBG Systems)

By measuring the waves and ice, the buoys help scientists understand how waves are approaching and breaking up the sea ice. When winter approaches and ice begins to refreeze, the buoys help show how the waves interact with the ice as the temperatures change.

Calibration. The IG-500A inertial sensors were used for wave height and direction. IG-500A measures in real time the roll, pitch, heading (accurate to 0.35°) and heave (accurate to 10 centimeters). Every sensor is calibrated for bias, linearity, gain, misalignment, cross-axis and gyro-g from –40° to +85°C. The calibration is key to enabling the sensors to provide reliable data in the harsh environment.

Doble said the units were reliable, with no failures in the harsh Arctic conditions. They ran continuously for more than a year without requiring power cycling, and “the numbers look good, giving clear results.”

The data is helping researchers understand the physics that control sea ice breakup and melt in and around the ice edge. “We have this amazing picture of the ocean, atmosphere, and ice going from the fully frozen period in March to meltdown and breakup right through to freeze-up,” said Craig Lee of the University of Washington’s Applied Physics Laboratory.

The IG-500A sensors also delivered heave measurement, important for instrumented ocean buoys. During the project, SBG Systems released the Ellipse Series, and the new line replaced the IG-500 series. More accurate in attitude and more reliable (with an IP68 rating) for the same budget, the new miniature inertial sensors now provide a heave measurement that automatically adjusts to the wave period, resulting in higher performance.

Clear differences were measured between surface wave activity outside of the ice, and then moving into the ice, with huge attenuation as the waves enter the ice and die back quickly.

Current Arctic Program. Following the close of the MIZ project in 2015, the ONR launched a new project for 2016–2020, the Stratified Ocean Dynamics in the Arctic (SODA). SODA is also taking place in the Beaufort Sea, and is using the autonomous ocean flux buoys. The buoys are now equipped with SBG’s Ellipse-A sensors.

Why the Arctic Matters

“There’s no question that the Arctic sea ice extent is decreasing,” said Martin Jeffries, program officer for the ONR Arctic and Global Prediction Program. “Multiple sources of data — autonomous underwater gliders, ice-measuring buoys and satellite images of the marginal ice zone — were used to help understand why the ice is retreating.”

The implications for the U.S. Navy, and the world, are significant. If there were no sea ice in the Arctic at the end of summer, that would mean that the Arctic Ocean would, until the winter ice came in, be completely open — something unprecedented in living memory, Jeffries noted.

Naval leaders have made it clear that understanding a changing Arctic is essential for the Navy to be prepared to respond effectively to future needs.

“[T]he opening of the Arctic Ocean has important national security implications as well as significant impacts on the U.S. Navy’s required future capabilities,” said then Chief of Naval Operations Admiral Jonathan Greenert, in his introduction to the U.S. Navy Arctic Roadmap, 2014–2030, published in 2014. “The United States has a history of maritime homeland security and homeland defense concerns in the Arctic Region […] .”

In the period between 2007 and 2014, satellites recorded the eight lowest sea ice levels ever. A key goal of the MIZ and SODA programs is to use the new data collected to make better predictive computer models — ensuring safer operations for not only naval vessels, but also anticipated increased sea traffic by shipping and fishing industries; oil, gas and mining companies; and tourism operations.
Much of the data coming in to Arctic scientists is now from improved sensors, with greater ability to survive the harsh weather and ocean conditions.

Inside the Ellipse

Alexis Guinamard, chief technology officer of SBG Systems, described to GPS World the company’s most advanced sensor for extreme environments.
“Of course we have more precise sensors like Ekinox, Apogee or even Horizon, for ‘extreme’ precision. But for extreme environments, the more appropriate sensor line is the Ellipse series,” Guinamard said. “There are several key parameters that make them better for this kind of environment.”

Those features include a high-temperature calibration range, from –40°C to +85°C, which enables the sensors to operate at the same performance level in the most extreme temperature environments.

“While typical entry-level or industrial-grade sensors only provide a room temperature or basic temperature calibration, we have developed a calibration procedure used for both survey-grade and industrial-grade sensors using a precision two-axis rotary table with temperature chamber,” Guinamard said. “An advanced thermal modeling minimizes the calibration error over the full temperature range.”

Ellipse-D dual-antenna mini INS/GNSS. (Photo: SBG Systems)

The sensors work in highly dynamic and vibrating environments because their gyros operate well, changing position up to 900° per second. Similarly, their accelerometers can reach up to 40 g, with excellent behavior in vibrating environments. “We can typically install our sensors directly on the chassis of the vehicle, while lower grade sensors may require specific dampers that are complex to design and make it difficult to precisely align the sensor,” Guinamard said.

A GNSS interference-mitigation capability enables the sensors to perform in challenging GNSS environments.

With the Ellipse-D, high latitude operation is possible because it provides a dual-antenna heading that is insensitive to higher latitudes, Guinamard explained.

Saltwater-Proof. SBG Systems sensors typically have waterproof (IP68) enclosures that can deal with harsh conditions and sustain exposure to saltwater for a limited period of time. For long exposure to salt water, the company offers specific titanium enclosures. For instance, its Navsight series has a saltwater-proof inertial measurement unit.

Navsight marine solution. (Photo: SBG Systems)

The Navsight Marine Solution is a motion and navigation solution for hydrographers available as a motion reference unit (MRU), as an inertial navigation solution (INS) with embedded GNSS, and as an INS using a third-party GNSS receiver.

Navsight can be outfitted for demanding shallow- or deep-water environments to survey highly dense areas (bridges and buildings), as well as applications where only a single antenna can be used.

With the addition of the Horizon inertial measurement unit (IMU) to the Navsight line in January, which joined the Ekinox and Apogee IMUs, the line is suitable for large hydrographic vessels surveying harsh environments. The Horizon IMU is based on a closed-loop fiber-optic gyro (FOG) technology that enables ultra-low bias and noise levels, allowing robust and consistent performance.

Dust, noxious gas and loose rock near the summit makes volcanic surveying especially challenging. (Photo: Trimble)

AT VOLCANO’S EDGE

GNSS Tracks Magma on Mount Etna

Scientists seeking to better understand volcanoes are using GNSS to investigate one of the most active in the world.

Mount Etna, in eastern Sicily, Italy, has been erupting for hundreds of thousands of years. The constant activity makes it a popular tourist attraction — smoke often billows from the mountain and fiery lava spews down its sides.

Researchers flock to Mount Etna, too, to study the movement of magma — the hot fluid beneath the Earth’s surface from which rocks are formed when cooled.

To measure the vertical gradients of gravity on Mount Etna’s slopes and summit craters, geophysicists from Slovakia and Italy teamed up on a field campaign during which they used high-accuracy GNSS positioning with emphasis on accurate height measurements to collect gravimetry and topographic information.

The extreme environment and spotty cellular coverage on Mount Etna made using GNSS with real-time kinematic (RTK) or virtual reference station (VRS) a challenge. The geophysicists used the Trimble CenterPoint RTX correction service and Trimble R10 GNSS receivers to ensure reliable GNSS performance.

“On many points, especially the higher part of the volcano, Internet signals were poor or [there were] none at all,” said Juraj Papčo, a geodesist with the Earth Science Institute of the Slovak Academy of Sciences. “Only by using RTX were we able to collect real-time data. It performed well in higher elevations and difficult conditions.”

The project teams also used Trimble RTX to navigate to locations where they needed measurements. At each station, they collected static and real-time positions and later compared post-processed results with the real-time positions.

Dust, noxious gas and loose rock made approaching the summit especially challenging. Trimble RTX helped the Slovak-Italian team of geophysicists better understand volcanoes and anticipate volcanic events.

Researchers used high-accuracy GNSS positioning to collect gravimetry and topographic information. (Photo: Trimble)

Prisms affixed to the track enable measurement of change and structural movement. (Photo: Topcon)

UNDER A METROPOLIS

Harsh Construction Environment Monitored

Deep beneath Paris, work is underway to expand the Metro, the city’s rapid transit system. The Grand Paris Express project encompasses a 200-kilometer-long network of railway lines — mostly underground — that will link the suburbs to the city.

The contractor responsible for monitoring construction of the first stage of the project’s infrastructure, Cementys, is using more than 100 instruments from Topcon’s MS series of robotic total stations because they can withstand the harsh construction environment.

Monitoring structural movement across the network is critical; the goal is to protect the surrounding Parisian structures and the people who live and work in them. Use of the monitors also ensures that the expensive equipment used on the project is not stolen.

Topcon’s MS Series robotic total stations continuously measure the angles and distances of prisms fixed to structures. As a result, site engineers know immediately when measurement change and structural movement occurs. The technology also includes Matrix Detection software to help increase the measurement system’s speed and accuracy. The company’s TSshield integrated security software, standard on all its total stations, provides remote locking and location positioning data to within 100 meters, depending on GPS and cellular coverage.

“We have been able to integrate this open technology perfectly into our global data management system, which also includes optical fibers sensors, vibrating wire sensors, and others,” said Cementys CEO Vincent Lamour.

Construction of the Grand Paris Express project is taking places in stages and is expected to be complete in 2030.

Photo:Position tracks from two laps of the race show that when the plane inverts and starts to track the reflected signal, the VN-300 GNSS/INS (blue trace) reverts to free inertial navigation and propagates the position based on inertial data. The trace follows a smooth trajectory through the next air gate until the GNSS data converges with the INS position. (Image: Google Earth with VectorNav Data)

ABOVE THE SEA

Flying High with Augmented Reality

The 2018 Red Bull Air Race World Championship in Cannes, France, made it easier for fans to follow along. Though pilots race one at a time, the new “Ghost Plane” augmented reality imagery provided fans with a real-time representation of each pilot’s flight, which challenges their speed, precision and skill maneuvering lightweight racing planes.

The Ghost Plane is driven by onboard telemetry data gathered during flight. For a pilot’s run to be accurately represented, the onboard telemetry system has to track position, velocity and attitude (yaw, pitch and roll) through high-dynamic maneuvers and in challenging environmental conditions.

While every Red Bull Air Race track layout is different, they all include a difficult vertical turning maneuver (VTM), where pilots pass through a gate and turn 180 degrees to reverse course quickly without exceeding the g limit.
Each plane is fitted with several GNSS receivers to track the plane, but dynamic maneuvers made during the race rapidly changes which satellites the GNSS receiver can track, which typically results in a loss of position fix.

To further increase the challenge for the telemetry systems, races are commonly held over water, which can reflect GNSS signals and create significant multipath errors at low altitudes. During the VTM, the plane can experience 300°/second angular rates and 12-g accelerations, during which GNSS tracking is typically lost because the antennas no longer point to the sky.

To make the Ghost Planes possible, a VectorNav VN-300 dual-antenna GNSS/INS (inertial navigation system) couples gyroscope and accelerometer data to propagate position and velocity estimates during loss of GNSS measurements through maneuvers such as the VTM.

The VN-300 combines two GNSS receivers with a 9-axis inertial measurement unit (IMU). It couples acceleration and angular rates from the IMU with position and velocity data from the receiver using a quaternion based Extended Kalman Filter (EKF). VectorNav algorithms work in conjunction with the state estimation filter, making the VN-300 more robust and intelligent, and enabling it to reject poor GNSS data and perform accurately in high-dynamic maneuvers and challenging operating conditions.

NEW EQUIPMENT

Antenna Designed for Challenging Environments

CHC Navigation’s latest GNSS antenna is an example of a product designed specifically for harsh environments.

AT311T antenna. (Photo: CHC Navigation)

The heavy-duty CHCNAV AT311T is designed for demanding applications subject to shocks and vibrations. With advanced filtering and robust signal tracking, it provides survey-grade GNSS signals to enhance position reliability for marine applications, machine control, precision agriculture and industrial automation.

Features include multi-constellation GNSS tracking using GPS, GLONASS, BeiDou, Galileo, QZSS, IRNSS and SBAS. Its IP68 water-resistant design makes it safe to use in extreme conditions with a wide temperature range (–40°C to +85°C). Its internal stacked structure enhances performance in high-interference environments, and the 40-dB signal gains, advanced signal filtering and multipath rejection design provide superior and robust GNSS signal tracking in challenging surroundings.

One of the two solar arrays on the InSight lander dominates this view of the plain of Elysium Planum, taken Dec. 4, 2018. (Image: NASA/JPL-Caltech)

IN OUTER SPACE

Exploring Beyond Earth

While GNSS isn’t useful on the surface of Mars, inertial navigation is a key technology for exploration of the red planet. For instance, the Northrop Grumman LN-200S sensor guided the Mars Opportunity rover, which explored Mars for 15 years until a storm struck in June 2018.

The LN 200S sensed acceleration and angular motion, with its data output used by the rover’s control systems for guidance.

The hermetically sealed unit, suitable for planetary and asteroid probes, helped position the rover’s antennae to relay photos and data to satellites. Opportunity beamed back 187,000 raw images, according to NASA.

Because IMUs don’t depend on satellites, they work well for deep space missions, Honeywell explained in a press release.

In November 2018, NASA’s InSight spacecraft landed on Mars to study the interior with a heat probe and listen for marsquakes with a seismometer. Aboard was Honeywell’s Miniature Inertial Measurement Unit (MIMU), an IMU that has been a part of Lockheed Martin’s Mars satellites and landers since 1998.

The MIMU is a three-axis strapdown device specifically designed for the satellite and deep-space-probe market (more than 500 MIMUs have been deployed throughout the solar system). It uses ring laser gyros to help control and stabilize a spacecraft during entry, descent and landing, as well as maintain orbit and payload orientation. The radiation-hardened design supports 15-year missions.

<p>The post Hot, cold, high, low: GNSS and INS perform under pressure first appeared on GPS World.</p>

Completion of the MIL-STD and DO-160 qualification tests proves the robustness of the tactical series to a range of temperature, shock, vibration and other environments, as well as conformance to numerous electrical interface and EMI standards.

The testing demonstrates an advantage of the tactical series for defense and aerospace applications. Other advantages are the modules’ SWAP-C (size, weight, power and cost) and performance characteristics.

“There is high demand for dependable, tactical-grade navigation solutions that perform in challenging environmental and operating conditions,” stated VectorNav Director of Sales and Marketing Jakub Maslikowski.

VectorNav’s tactical series includes the VN-110 IMU/AHRS, the VN-210 GNSS/INS and the VN-310 GNSS-compass aided GNSS/INS.

VectorNav’s new Tactical Series includes the VN-110 IMU/AHRS, the VN-210 GPS/INS and the VN-310 dual-antenna GPS/INS. (Photo: GPS World)

The products include an onboard tactical-grade IMU (<1˚/hr in-run gyro bias stability), along with VectorNav’s proprietary filtering, INS and GNSS-compass algorithms.

The products offer 1 to 2 mrad attitude performance in compact, rugged enclosures and include a 10-pin auxiliary port for integration with external real-time kinematic and SAASM-based GNSS receivers, as well as higher-performance IMUs.

Testing for the MIL-STD and DO-160 standards was performed by independent, certified testing companies in Plano, Texas, and Huntsville, Alabama.

<p>The post VectorNav tactical series earns MIL-STD and DO-160 certifications first appeared on GPS World.</p>

VectorNav designs and manufactures three different product types:

• Inertial measurement unit / altitude heading reference System (IMU/AHRS)
• GPS-aided inertial navigation system (GPS/INS)
• GPS/INS with built-in GPS-compass (dual GNSS/INS).

Each product type is offered in two performance categories, Industrial and Tactical Grade, which is an indication of the quality of the IMU core.

Product Models

VectorNav product models

Key Product Features

The VectorNav VN-300

Industrial Series:

• High-performance in SWaP-C optimized packaging
• 5˚/hr typical in-run gyro bias stability
• 0.3˚ RMS heading, 0.1˚ pitch & roll
• Miniaturized surface mount (OEM) and rugged packaging
• Serial TTL, SPI and USB communication interfaces
• < 30 grams

Tactical Series:

• 

  The VectorNav VN-310.

  Tactical-grade performance in ruggedized enclosures

• < 1˚/hr in-run gyro bias stability
• < 2 mrad attitude performance
• IP68-rated enclosure designed to meet DO-160G
• Support for external GPS/GNSS or IMUs
• < 200 grams

All VectorNav products:

• incorporate VectorNav’s robust inertial navigation algorithms
• are individually calibrated across full temperature range (–40 C to +85 C)
• share a common communication protocol across all products
• offer sync-in and sync-out functionality and GPS PPS
• ship worldwide on short lead times (1–2 business days)
• are supported directly by VectorNav’s team of applications engineers, business and production teams, and domestic and international representatives
• are produced at VectorNav’s AS9100 certified facility
• are made in the U.S. and ITAR-free.

www.vectornav.com
sales@vectornav.com
10501 Markison Road
Dallas, TX 75218 USA

NovAtel

PwrPak7D-E1

The PwrPak7D-E1.

The PwrPak7D-E1 is a robust, high-precision receiver that has multi-frequency, dual-antenna inputs and provides GNSS multi-constellation heading and position data. These capabilities make the PwrPak7D-E1 suitable for ground vehicle, marine or aircraft-based systems. NovAtel’s Synchronous Position, Attitude and Navigation (SPAN) technology brings together GNSS positioning and inertial navigation to provide an exceptional 3D navigation solution that is stable and continuously available. The PwrPak7D-E1 has a powerful OEM7 GNSS engine, integrated Epson G320N micro electromechanical (MEMS) inertial measurement unit (IMU), built-in Wi-Fi and 16 GB of internal storage.

Key Product Features

• SPAN-enabled enclosure featuring NovAtel’s tightly coupled GNSS+INS engine
• Enhanced connection options including serial, USB, CAN and Ethernet
• 555-channel, all-constellation, multi-frequency positioning solution
• Multi-channel L-band supports TerraStar correction services
• Onboard NTRIP client and server support
• Multiple communication interfaces for easy integration and installation
• Built-in Wi-Fi support
• 16 GB of internal storage
• ALIGN heading solution

Signal Tracking

Primary RF

• GPS (L1 C/A, L1C, L2C, L2P, L5)
• GLONASS (L1 C/A, L2 C/A, L2P, L3, L5)
• BeiDou (B1, B2)
• Galileo (E1, E5 AltBOC, E5a, E5b)
• NavIC/IRNSS (L5)
• SBAS (L1, L5)
• QZSS (L1 C/A, L1C, L2C, L5)
• L-Band (up to 5 channels)

Secondary RF

• GPS (L1 C/A, L1C, L2C, L2P, L5)
• GLONASS (L1 C/A, L2 C/A, L2P, L3, L5
• BeiDou (B1, B2)
• Galileo (E1, E5 AltBOC, E5a, E5b)
• NavIC/IRNSS (L5)
• QZSS (L1 C/A, L1C, L2C, L5)

www.novatel.com
sales@novatel.com

<p>The post 2018 Inertial Buyers Guide first appeared on GPS World.</p>

Phoenix Lidar’s Scout System features NovAtel SPAN GNSS/IMU equipment and a pinwheel antenna. Combined with Phoenix’s hardware and software, this lightweight UAV lidar system serves in agriculture, construction and other general mapping applications. Here the Scout is integrated with the DJI M600 Pro UAV. (Photo: Phoenix Lidar Systems)

As a UAV flies, it is subject to roll, pitch and yaw movements, adversely affecting the high-definition imagery that industrial-grade UAVs are designed to collect. Three measures combat unwanted movement: a stabilizing gimbal, a high-quality GPS/inertial measurement unit (IMU) integration, and orthorectification of the data during post-processing.

Imaging applications are driving all sectors of the booming UAV market. The increasing availability and variety of compact, robust, lightweight sensors, employing a range of super-resolution and often multi-spectral and hyperspectral technologies, continuously expand and improve UAV applications.

Three companies exhibiting at the Association for Unmanned Vehicle Systems International’s (AUVSI’s) massive Xponential show May 1-3 will showcase recent advances in this arena.

Challenges of Airborne Imaging. Size and weight govern UAV deployment.Imaging sensors must fit compact payload bays. An integrated UAV solution will typically include an imaging sensor, a high-performance GPS/inertial measurement unit (IMU), and a data storage hub to collate streams of data from all connected instruments.

Software geared specifically to flight supplies image orthorectification and manages sensor operation during the mission, enabling users to input GPS coordinates for sensor operation. Outside of defined coordinates, the sensor will not collect data, reducing the amount of data to store or transmit.

Immediate or real-time processing and georeferencing of imaging products has always been key to defense and security applications; it becomes critical for precision agriculture, cartography, civil engineering, remote monitoring and surveillance, intelligent inspection, disaster preparedness and risk study, newsgathering, cinematography, tourism and even commercial advertising. A multisensor landscape view can improve a UAV’s ability to react intelligently without operator input.

Integrated GPS/INS exhibitors at the Xponential show include:

NovAtel (Booth 3219). The company uses a flexible technology platform and diverse OEM products, which include SPAN technology: tightly coupled GNSS receivers with IMUs for reliable, continuously available, position, velocity and attitude, to deliver its vision of assured positioning — anywhere.

NovAtel offers TerraStar Correction Services to provide accurate real-time sub-meter or decimeter positioning around the world, anytime. Its Waypoint Inertial Explorer Xpress post-processing software provides the same core processing and utilities as Inertial Explorer along with simplified functions and workflows tailored for UAV markets and small project areas.

VectorNav (Booth 2214). Engineers at Octopus ISR integrated the VectorNav VN-200 GPS/INS directly into the optical bench of a gimbal to deliver positioning accuracy under flight conditions such as high vibrations, accelerations and temperature fluctuations. The device flies aboard the UAV Factory’s miniature Epsilon series of gyro-stabilized gimbals, enabling the Precision Geo-Lock feature, which combines a GPS-aided inertial navigation system with dedicated software algorithms and payload operator software.

The VN-200 features 16g accelerometers and 2000°/sec gyros in a postage-stamp-sized surface-mount device and a rugged package. Epsilon gyro-stabilized turrets are available with both VectorNav’s VN-200 single GPS-based INS solution and the VN-300 dual GPS-based INS.

SBG Systems (Booth 2535). The company developed specific calibration procedures to provide reliable heading even when UAVs tilt. Magnetometer calibration can be processed in 2D on the ground, or in 3D in flight. Qinertia software enhances inertial navigation systems performance by post processing inertial data with raw GNSS observables.

SBG Systems’ Ellipse 2 Micro high-performance inertial sensors reduces size and costs and for volume projects. It is available as an inertial measurement unit (IMU), or as an attitude and heading reference system (AHRS) or inertial navigation system (INS) running an extended Kalman filter, connected to an external GNSS receiver.

<p>The post AUVSI Xponential preview: IMUs key to UAV imaging advances first appeared on GPS World.</p>

Weighing less than 30 grams, the VectorNav VN-300 is a tiny dual-antenna GNSS-aided INS. It is used in applications ranging from autonomous vehicles to antenna pointing for satellite communication and aerial surveillance applications.

The inaugural event of the 2018 season in Abu Dhabi saw the VN-300, manufactured by VectorNav Technologies, used for the first time in all 14 aircraft to provide real-time telemetry data used for judging, in-race simulation and virtual reality applications.

Created in 2003, the world championship has held more than 80 races around the globe. The motorsport competition combines speed, precision and skill.

U.S. pilot Michael Goulian performs during the finals at the first round of the Red Bull Air Race World Championship in Abu Dhabi on Feb. 3.(Photo: Andreas Langreiter, Red Bull Content Pool)

Using the fastest, most agile, lightweight racing planes, pilots hit speeds of 370 km/h while enduring forces of up to 10 G as they navigate a low-level slalom track marked by 25-meter-high, air-filled pylons. Pilots incur time penalties for hitting pylons, incorrectly passing through air gates or only exceeding 10 G for more than 0.6 seconds, among others.

Being an individual sport, spectators need a reference to see the difference between the pilots’ lines and speed through the racetrack. Red Bull Air Race Live TV uses an augmented reality (AR) solution known as the Ghost Plane to display the trajectory of the pilots’ runs for real-time comparison in the head-to-head rounds and the Final 4 that decides the winner of the race by time.

The Ghost Plane is driven by the position, velocity and attitude data gathered during flight from the onboard INS.

Critical to the success of the Ghost Plane is the accuracy of the telemetry data, which, given the high dynamics experienced during flight, is extremely difficult to obtain.

For example, as a plane races through a chicane and into a vertical turn maneuver, GPS signals are lost and the INS needs to rely solely on the inertial sensors to accurately estimate the position and velocity until GPS is fixed again in level flight.

The VectorNav VN-300. (Photo: VectorNav)

“We evaluated several different inertial navigation systems and struggled to find one that was able to perform in our dynamics,” said Alvaro Navas, sport technical manager for the Red Bull Air Race. “VectorNav’s VN-300 was the only product able to deliver the attitude, position and velocity data accuracy we require, and it did this out of the box, no customization was required. The sensor is really amazing.”

“We are really excited to be working with Red Bull Air Race,” said Gordon Hain, VectorNav product manager. “Not only are we able to provide accurate data for the race judges and spectators, but we are also able to provide valuable information to pilots and tacticians. With the VectorNav data in hand, they are able to compare actual flight trajectories with their simulations to find areas for improvement. We are looking forward to continued work with Red Bull Air Race in the 2018 season and beyond.”

<p>The post Red Bull Air Race selects VectorNav VN-300 for onboard telemetry first appeared on GPS World.</p>

As another holiday season passes us by, it is customary to look back at the year and recall the trends, new products and services, and breakthroughs we experienced with the GNSS environment and its effect on the professional surveyor. While 2017 was not filled with groundbreaking instruments and programming, it did provide a good look at what are going to be trends and gamechangers for the near future. From new innovations on GNSS receivers, new UAV platforms, and geospatial advances, it was also a year that saw location spoofing of shipping vessels, trade relations among super powers being tested, and more opportunities to put satellites into orbit from the private sector. Let us look back at what the surveying community experienced with the GNSS industry:

The constellation scorecard

GNSS continued to expand to all reaches of the globe with enlargement of existing constellations along with introductions of several new ones, (see GPS World magazine “The Almanac,” December 2017). The European satellite system, Galileo, has led the expansion with four (4) new vehicles. This joint venture of the European Commission and the European Space Agency was declared operational at the end of 2016 and looks to keep increasing its coverage in the coming years. For surveyors, this means additional redundancy for our positional data. More confirming redundancy translates into increased confidence in our work product.

Next in numbers of vehicles being sent to space is the Japanese effort named Quasi-Zenith Satellite System (QZSS) and operated by the Japan Aerospace Exploration Agency (JAXA). While their first bird was sent up in 2010, this was the breakout year with three (3) more satellites installed this past year. It is anticipated that the constellation will be operation in 2018 and we can expect most of the GNSS manufacturers to include the positional data from QZSS if they haven’t already built in this capability.

Coming in next are the Chinese with their regional-based system called BeiDou with two (2) more satellites installed in 2017. Their current program is scheduled to have several more vehicles included in the constellation and provide worldwide positional coverage by 2020. With the rapid expansion of China as a world leader, we can anticipate more GNSS developers to work closely with BeiDou as the system becomes more effective on the global stage.

The other world leader, Russia, continues their expansion of GLONASS with the installation of one (1) new satellite in 2017 with plans to upgrade several existing vehicles in the coming years. The inclusion of GLONASS signal reception by survey-grade GNSS receivers has greatly increased the redundancy of data collection, (as mentioned with Galileo). It has also expanded our timeframes in which we can work with reliable positional solutions, thus keeping our downtime to a minimum.

The United States is by no means bringing up the rear in GNSS constellation development but 2017 was a transitional year for the program. A new government administration has led to revisiting our national budget, with the Department of Defense looking to prosper under preliminary plans. While the schedule for constellation expansion have been in place for several years, the installation of Block III satellites has become a higher priority. These satellites will provide higher positional accuracy than previously experienced without any correction signal utilized. This will help the surveyor with better positional accuracies in shorter timeframes and looking forward to its expanded capability.

Once these constellations are operational (with more to come), the ability to record positional locations and attribute data will be greater than ever. A potential challenge to these satellite constellations, however, is the ever-growing fear of potential conflicts between the United States and several countries, including North Korea, Syria, Iran, and Russia. The threat of nuclear war with North Korea could result in our GPS network being shut down to civilians or blocked by an electromagnetic pulse weapon. Cold War tactics with Russia could lead to spoofing or blocking of GLONASS signals that many of our GNSS receivers have become reliant upon. There are alternatives being developed in case our GPS goes away (see “The Day GPS Went Away,” September 2017) but we are several years from having a true secondary option. We will need to keep our fingers crossed we can maintain peace across the globe but do not look forward when something happens and takes our GNSS ability away.

Data mining and the surveyor

One thing that has emerged from 2017 has been the importance of data; where it is housed, how we use it, and what it can tell us about our future endeavors. GNSS has revolutionized the data mining industry with the surveying industry being right in the middle of the fray. Prior articles were published about geolocation (see Geolocation and the surveyor: Looking back to the future) so the rapid expansion of the data collection into most business environments shouldn’t surprise most readers, especially if one reads technical sources like GPS World magazine. The surveying community has watched and experienced the astronomical growth of this data collection in various arenas, none of which was more obvious than the “Geospatial 4.0” initiative at Intergeo 2017 in Berlin, Germany. While summarizing to readers on a trip through the annual conference in the last article (Intergeo 2017: A surveyor’s perspective), it was also here that a bigger picture was coming into focus regarding data and its effect on our world.

While doing homework for this article, the term “Geospatial 4.0” was coined for the 2015 Intergeo conference in Stuttgart, Germany. This term was developed by the conference team regarding the advancing developments in the data world that incorporate geolocation, time, and unlimited information attributes, all while stored in a central location “in the cloud.” This environmental condition exists for most us already, as it is estimated there are three to four billion smartphone users worldwide. The data that is being collected every day is a small part of how our lives and relative actions have become digital snapshots to assist those charged with forecasting and planning of our future cities and environments. Much of this data is being used to advance the places where we live through an initiative called “Smart Cities.” Installation of data collection sensors and control systems in various applications monitor and store information to help make necessary changes to the existing systems. The organizations and municipalities behind this effort are attempting to create better work and home environments with increased efficiency and sustainability.

The professional surveying community plays a big part in the continuing development of geospatial world around us. Our job is not only to collect data for a boundary survey, topographical information for an engineering design, or provide layout assistance for construction; we are also historians in establishing the current positions of required information at a specific point in time. The world around us can move quickly, so providing the precise moment in time when data is collected is sometimes just as important as the location itself. Our role as surveyors becomes even more important as the increased development and implementation of geographical information systems (GIS) emerges within more public and private entities. Where the surveyor previously shunned being included within the collection process and framework of GIS, our profession has become quite efficient at the data acquisition and database maintenance necessary for geospatial success.

The surveyor’s friend in the technical world of geodesy, the geodesist, has not always been an accepted member of the GIS world, either. Once seen as mathematicians stuck in laboratories calculating “perfect world geometric solutions,” the geodesist carries a significant amount of beneficial information to the realm of geospatial data. It has been through their data collection and research that has brought our shifting continents to light and the simple fact our land-based coordinate systems must be modified to change positions as time rolls along. The common theme here is that spatial data comes down to several distinct factors: position, navigation, and time.

PNT (not just another dull government acronym…)

Another big step forward taken in 2017 was the continued implementation of positioning, navigation, and timing, otherwise known as PNT. These three bits of information provide the geographic basis of collected data for any GIS or other environmental study. According to the U.S. Department of Transportation website, here is the definition of PNT:

“…a combination of three distinct, constituent capabilities:

Positioning, the ability to accurately and precisely determine one’s location and orientation two-dimensionally (or three-dimensionally when required) referenced to a standard geodetic system (such as World Geodetic System 1984, or WGS84);

Navigation, the ability to determine current and desired position (relative or absolute) and apply corrections to course, orientation, and speed to attain a desired position anywhere around the world, from sub-surface to surface and from surface to space; and

Timing, the ability to acquire and maintain accurate and precise time from a standard (Coordinated Universal Time, or UTC), anywhere in the world and within user-defined timeliness parameters. Timing also includes time transfer.”

(Source: https://www.transportation.gov/pnt/what-positioning-navigation-and-timing-pnt)

The basis for PNT can be used for any data collection. From fixed monuments utilized by surveyors to any municipal utility installation, the use of PNT now becomes an important part of the GIS database, if not for anything more than simple tracking. By establishing the location of any entity at any given time and comparing its position to an earlier collection, we can determine the navigation of that entity. A good example of PNT and our daily interaction is the satellite navigation systems installed in our phones and vehicles. When we utilize our favorite mapping program on our phone or in our car, we are implementing a PNT system to show us where we are, how fast we are going and help determine how soon we will be getting where we are going. This wonderful practice is being made possible by GNSS data collection and computer processors turning the positional data into useful information.

Surveyors are doing the same thing by the data collection they are performing every day. Any data that is collected by a modern survey instrument is being tagged with two of the main components of PNT; position and time. When the same entity is collected again later, its navigational information can be determined if needed as well. This type of data collection is becoming more apparent with laser scanning and lidar point clouds, as this data can be revisited to determine how much entities within the project area has changed. I foresee a time in the not-to-distant future where much of the Earth is scanned for historical purposes and can be analyzed by future generations for changes. A surveyor could benefit greatly by knowing where a water feature (rivers, creeks, streams, and lake and ocean shores) existed at a specific point in time and how much it has changed over time. Many land boundaries are based upon these water features as natural delineators, so knowing how much title area has changed with the natural movement of a waterway would be very beneficial to the surveyor and how land boundary disputes are handles. Same could be said of buildings and other improvements within developed areas, too. By establishing geospatial data on physical improvements, it could greatly help the surveyor determine historical and future land boundaries by their known location.

The simple fact is that our ability to collect, analyze and retain geospatial information has never been greater than now and only gets better over time. The surveyor now has similar tools to other sciences and technologies, so now is an appropriate time as any to truly embrace geospatial data collection.

UAV’s continuing growth

One market that continues growing at rapid pace is the unmanned aerial vehicle (UAV) sector. 2017 brought more aircraft innovations and expansion of sensors available for a multitude of data collection purposes. This greatly expanding segment of specialized equipment was quite evident at Intergeo 2017, where over 150 UAV vendors were provided their own space solely for the exhibiting as well as an outside arena for demonstrations. While there are other UAV trade shows that rival in the size, the Intergeo show brings the best vehicles, software and ideas for geospatial data collection and imagery directly to the surveyor’s hands.

Other innovations that are taking shape in the UAV world include larger multi-rotor aircraft with increased payloads, vertical takeoff and landing (VTOL) platforms, and a plethora of sensors designed specifically for UAV use. These modules include various methods of lidar for high accuracy scanning, hyperspectral cameras for analyzing plant characteristics, infrared scanners for heat detection, along with camera possibilities that are endless. The main reason to highlight these high-tech applications is simple; these technologies consist of location-based data collection. The surveyor, known professionally as the expert measurer, should make themselves more aware of the rapidly expanding ability to collect data of varying types new to the land surveying field but still relies heavily on accurate and precise measurement methods. The UAV, while still new to many surveyors, is becoming a standard measuring tool in our world. These latest sensors are a result of applying emerging technology for non-traditional surveying clients directly into our wheelhouse. The professional surveyor successfully adapted to new methods and instruments when electronic distance meters, GNSS receivers and laser scanners were introduced, so our profession needs to step up again and take note of what data collection methods and challenges are out there.

Wingtra One in the air. (Photo: Wingtra)

Staying on the subject of surveyors and the UAV, one of the next breakthroughs will be the introduction of affordable aircraft with RTK capability. There are currently several manufacturers of survey-grade UAV aircraft but these are sold at higher price point that is considered out of reach for the typical surveyor. Many have relied on less expensive models in conjunction with their existing RTK receivers to collect physical points or features for use with post-processing software. While not resulting in immediate data for project review, the end product of the post-processed method is quite good and at much lower cost of entry. However, there are times and places where ground control is not available or accessible so flights with photos or scans are not possible. The mainstream UAV manufacturers are taking note of the need for RTK capability and beginning to introduce models with this positional feature, so maybe the tide is turning to lowering the price point for this technology as well. Here is another place the surveyor will need to enter the UAV arena as the long-time RTK expert and utilize the latest technology for expanded data collection purposes. To my fellow surveyors: you’ve been warned, so be ready to get your checkbook out in order to stay competitive.

Survey-grade GNSS receivers

While 2017 wasn’t a breakout year for radically new GNSS technology, it did see its share of minor yet significant improvements. Along with the expansion of existing constellations and preparation for new ones, the technology behind the microprocessor within the GNSS receiver continues to allow for miniaturization and increased speed and accuracy. Several manufacturers are producing survey-grade receivers capable of acquiring hundreds of GNSS signals yet fit in the palm of your hand. Batteries, like most technologies using it, continues to decrease in size yet gain in power-up time. This rapidly shrinking footprint of the GNSS receiver is allowing for placement in more devices and places so the surveyor will need to take advantage of these gains to assist with providing positional and data collection expertise.

A sector of the positioning market that will see rapid increases is the smartphone division. Coupled with the growing GNSS constellations with increasing accuracy signals and more sophisticated computing power programmed specifically for positioning, we will see more smartphones being used for data collection purposes. Google has made significant strides in the customization of the Android operating system to allow for the processing of raw GNSS data to provide positional accuracies beyond the normal smartphone capability. It is safe to say that Apple is likely working on the same type of application for the iOS operating system, so we could see another battle for smartphone supremacy be waged on a highly technical front that surveyors can readily use for their profession.

Another advancement in GNSS technology that will see more in 2018 and beyond will be the use of the inertial measurement unit (IMU) in conjunction with receivers and sensors. Several manufacturers have incorporated IMU’s into their measuring devices to augment the data being collected. The application that has surveyor’s attention is a GNSS receiver with an IMU to record the measurement correlation of the pole tip to the center of the antenna. The IMU has also been configured on various vehicles built for mobile data collection to measure velocities and acceleration to assist with reducing errors within the GNSS measurements by environmental factors. As GNSS receivers continue to evolve and reduce in size, it will also allow for further inclusion of an IMU to help with reduce data errors. Surveyors should take note of these advancements and be prepared to upgrade their equipment and knowledge to stay current with emerging technology and data collection accuracies.

VectorNav’s new Tactical Series includes the VN-110 IMU/AHRS, the VN-210 GPS/INS and the VN-310 dual-antenna GPS/INS.

Into 2018 and beyond…

Some of the items worth watching in the immediate future include:

Autonomous travel

From Elon Musk’s Tesla projects to the Uber/Volvo collaboration with driverless vehicles, autonomous travel will dominate tech news for the next few years. Because these vehicles rely heavily on GNSS positioning in conjunction with road-reading sensors, the focus on the GNSS constellations will stay very much in front of the tech and political worlds. Another portion of the driverless equation is the effective mapping of the roadway system, which come right back into the realm of the surveyor. While we see various mapping vehicles (Google, Apple, and others) out and about digitizing our roadways, the surveyor is the professional entity that is relied upon for the location establishment for existing and future rights-of-way. Our inclusion in mapping these byways is critical to minimizing harm to the public for potential accidents and disasters.

Lightsquared 2.0

The battle over bandwidth several years ago seemed to end with the FCC denying the implementation of ground-based signal amplification by an upstart firm known as Lightsquared. Now with the new administration at the FCC and an atmosphere of deregulation, the firm has rebranded itself as Ligado and is back to try again. Hopefully the same coalition that helped defeat the prior attempt will be back, but with the new ideology running the FCC, all bets are off. The surveyor without GNSS capability (as previous discussed) will mostly be rendered lifeless without it.

Internet of Things (IoT)

Also fighting for bandwidth is a new generation of sensors and monitors being used for a multitude of products and procedures. This movement toward automation is proving to be useful in many environments but is beginning to tax an already overworked data stream. These components are more appropriate in mostly urban areas where broadband coverage is most effective but their implementation in rural America is starting to drive a greater need for more data availability in harder to get places. This push to get more broadband into rural areas will be a wonderful opportunity for those surveyors to complete their projects with similar effectiveness their counterparts in the urban areas already utilize. But the move by the FCC to repeal net neutrality poses a significant threat to that opportunity and equality, so we must wait and see how this plays out as well.

Final thoughts…

While covering a lot of ground here, the main thread is to emphasize the important link between the professional surveyor and the use of GNSS equipment and procedures. Prior to most of the emerging technology, the surveyor was relied solely for boundary determination and not much else. As engineering design became more reliant on detailed topographic surveys, the surveyor increased their responsibility to provide that vital information. As measuring and positional determination has become more complex, the surveyor has adapted to technology and provided that expertise in their duty to protect the public’s interest. Our world is getting more complex every day and we rely on specialized professions for a multitude of tasks. The surveyor can and should be relied upon for tasks discussed herein but making sure both the surveyor and the public knows that is a big key to success. Accurate positioning and reliable measurements requires someone with the knowledge of the subject and technology and the professional surveyor is that someone. To my fellow practitioners; stay involved, advance your education, and continue to be professional.

<p>The post GNSS & Surveying 2017: The year in review first appeared on GPS World.</p>