GNSS (all systems)

March 8, 2022

Precise Point Positioning in Urban Environments

With a Low-cost Single-frequency Multi-GNSS Receiver

Although precise point positioning (PPP) has been largely limited to applications in open environments using high-end GNSS receivers, recent test results demonstrate that a new PPP system with a mass-market receiver can significantly improve positioning accuracy in urban environments.

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By Inside GNSS
March 7, 2022

Q: How could GNSS users determine in real time that their received navigation signals are correct? What methods are recommended, and when might they go into operation?

Cryptographic techniques can optimize the trade-off between authentication integrity (minimizing the probability of authenticating a modified message), ease of modification of existing signals (for operator and user acceptance), and minimal impact on existing users who will form the vast majority of the GNSS user population for some time to come.

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By Sam Pullen
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Washington View: 5G, PNT, and Air Safety

A  deadlock over 5G implementation, and the potential hazards the technology would create for air traffic safety, has been at least temporarily resolved. Not all questions have been answered nor problems eliminated, however. And while radio altimeters do not use GPS or GNSS technology, they are definitely PNT devices, and this situation could create precedents for ongoing and future conflicts between telecom and PNT use of the finite radio spectrum.

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By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
March 1, 2022

Real-Life Testing: Part 2 – Operational Test Phase

Skin in the Game – Engineers Subject Themselves to Sensor Fusion

Two Hexagon I NovAtel employees and a reporter sacrificed their bodies in the name of science by riding in the jump seat of an Aero Albatros fighter training jet during the L-39 demonstrations. Here, we get the perspectives of those brave souls and the mastermind behind the unique human aspect of this experiment.

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By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
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February 24, 2022

Software-Defined GNSS Receiver Goes Open Source

The Finnish Geodetic Institute (FGI) of the National Land Survey of Finland announced the release of its software-defined receiver as open source for the international GNSS community. The GSRx software receiver has been extensively used as a research platform for the last decade in different national and international R&D projects to develop, test and validate novel receiver processing algorithms for robust, resilient and precise position, navigation and timing (PNT).

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By Inside GNSS
February 17, 2022

Military GPS Equipment Delays Prompt Army, Marines to Buy Direct, Says Latest Pentagon Report

U.S. military efforts to field jam-resistant GPS weaponry not only run behind schedule, they continue to fall back, according to the annual report from the Department of Defense (DoD) Director, Operational Test and Evaluation (DOT&E) Nickolas Guertin. Because “the lack of M-code capable receivers limits the M-code use by U.S. and allied warfighters,” branches of the Armed Forces are now sourcing directly from commercial suppliers.

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By Inside GNSS
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