Global Navigation Satellite Systems Engineering, Policy, and Design
NextNav announced that it has successfully demonstrated the timing precision and resilience of its terrestrial position, navigation, and timing (PNT) system, TerraPoiNT, in a recent evaluation by the Science & Technology Directorate (S&T) of the Department of Homeland Security (DHS).
By Inside GNSS
The Defense Innovation Unit (DIU) of the Department of Defense (DoD) sought in mid-August commercial solutions to counter growing GNSS spoofing operations.
By Inside GNSS
GPS + inertial + camera + LiDAR + baro-altimeter = a very precise measurement, right? Not when the respective sensor output timings lack proper synchronization. Only when each piece of data carries an accurate timetag can they together enable optimal performance in multi-sensor fusion systems.
By Inside GNSS
Spirent Federal Systems, a provider of PNT/GNSS test equipment, announced plans to fully validate the inertial interface between Spirent GNSS simulators and both Northrop Grumman legacy and modernized inertial systems under the EGI-M program.
By Inside GNSS
Honeywell unveiled a new rate sensor specifically intended to help small satellites navigate increasingly crowded orbits above the Earth’s surface.
By Inside GNSS
Deepwave Digital has release a new Artificial Intelligence Radio Transceiver (AIR-T) Edge Series model, the AIR8201.
By Inside GNSS
GeoOptics Inc. has upgraded its CICERO constellation of Earth-observation satellites to include advanced GNSS Reflectometry (GNSS-R).
By Inside GNSS
Trimble announced enhancements to its Trimble RTX correction services. Improvements in the high-accuracy correction service include convergence time reductions, more reliable and robust signals, and an easier workflow for surveyors.
By Inside GNSS
In-flight refueling requires sustained minimal separation between paired aircraft with little room for error. In or near combat zones, wide-area GPS-denial or spoofing means that an GPS-independent system must be available. Regardless of the selected sensor package, a common set of properties must be satisfied to facilitate mid-air docking: a high degree of accuracy, precision, and integrity.
UrsaNav and ADVA have conducted an enhanced long-range navigation (eLoran) field trial using UrsaNav’s eLoran receiver and ADVA’s Oscilloquartz grandmaster clock technology. The successful demo showed that eLoran offers a robust and reliable backup for GPS and other GNSS and could be used to provide an assured position, navigation, and timing (PNT) service.
By Inside GNSS
The addition of alternative sensors such as cameras, magnetometers, and small ranging radios increases the likelihood of a mismodeled and/or faulty sensor, affecting the accuracy and performance of the overall navigation solution. Unlike two-sensor systems such as GPS-inertial integration, systems of three or more sensors present the problem of ambiguity as to which sensor is adversely affecting the solution. This presents the need for a robust framework that can maintain navigation integrity despite the additional sensor modalities.
There has been much discussion of the need for resilient PNT over the past few years as dependencies have grown and an evolving threat matrix has become more active. As a nation, we need a measured and cost-effective response commensurate with the level of threats and the possible consequences.
Tallysman Wireless announced its new eXtended Filtering (XF) features to the TW3900 series of Accutenna precision antennas. The XF feature is designed to mitigate interference from all near-band signals.
By Inside GNSS
