GNSS (all systems) Archives - Page 30 of 153 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

GNSS (all systems)

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March 28, 2022

Job Opportunity: (SES) Director, Center for Communications, Navigation, Surveillance Systems and Engineering

US Department of Transportation, Cambridge, MA

This position is one of the Technical Centers at Volpe whose function is to undertake transportation analysis, research and system development that contributes to a compelling vision of the 21st Century transportation enterprise and supports decision making in the development, management, operation, and financing or an integrated multimodal national transportation system that meets 21st Century mobility needs for goods and people.

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By Inside GNSS
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Multiple Imaging Radars Integrate with INS/GNSS via AUTO Software Reliable and Accurate Positioning for Autonomous Vehicles and Robots

Difficult GNSS environments and adverse weather conditions require a fusion of many sensors to maintain lane-level accuracy for autonomous platforms, without incurring high costs that would inhibit widespread adoption. Radars are an attractive option in a multi-sensor integration scheme due to being robust to adverse weather and insensitive to lighting variations.

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By Inside GNSS
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Moon
March 10, 2022

Taking PNT to the Moon

The 2022 edition of the Munich Satellite Navigation Summit drew speakers (virtually) from around the world, providing a broad overview of the latest developments in the field of GNSS. A highlight was the out-of-this-world session on PNT for lunar navigation, featuring long-time collaborators ESA and NASA.

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By Peter Gutierrez
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Signal Authentication, 5G and a Whole Lot of SatNav Trouble

The following is a partial transcript of a talk given to the National PNT Advisory Board Executive Committee (PNTAB ExCom) on December 9, 2021. It connects GNSS signal authentication, by both Galileo’s OSNMA and the proposed GPS Chimera signal, with developing PNT capabilities in 5G telecom technology, and further, with software-defined radio (SDR) capabilities aboard some GNSS satellites that could place GPS in the second tier.

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By Inside GNSS
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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
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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.)
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