Global Navigation Satellite Systems Engineering, Policy, and Design
In September, the U.S. Department of Transportation (DOT) issued a Request for Information (RFI) to seek industry input on Complementary Positioning, Navigation, and Timing (CPNT) technologies.
By Dawn M.K. Zoldi (Colonel, USAF, Ret.)
For years, the U.S. Department of Transportation (DOT) has been exploring the technologies and systems necessary to provide positioning, navigation, and timing (PNT) services to complement the Global Positioning System (GPS) so that these critical services remain available even when GPS signals are disrupted. In the past few months, the department has ramped up these Complementary PNT (CPNT) efforts, from its issuance of a CPNT Action Plan in September to a related Request for Information (RFI) seeking industry input on CPNT technologies. What are these efforts, how are they going and why the sense of urgency now?
By Dawn M.K. Zoldi (Colonel, USAF, Ret.)![IonoGuard PR Image[32]](https://insidegnss.com/wp-content/uploads/2023/10/IonoGuard-PR-Image32-150x150.jpg)
WESTMINSTER, Colo., Oct. 10, 2023 — Trimble (NASDAQ: TRMB) introduced today Trimble IonoGuard™, a next-generation technology designed to mitigate ionospheric disruptions in positioning and navigation by minimizing performance impacts caused by scintillation or signal noise.
By Inside GNSS
GBAS corrections are typically only used for precision approaches of large aircraft. This study tests using GBAS corrections and integrity parameters for UAVs.
By Inside GNSS
A look at NTCM-G, a new Ionospheric model fully compatible with the Galileo Open Service.
By Inside GNSS
The recent spotlighting of alternative positioning, navigation and timing technologies by weighty bodies such as the European Commission and the European Space Agency is causing more than a stir among the concerned communities, with both public and private interests now readying themselves to move beyond conventional GNSS for critical applications.
By Peter Gutierrez
In the past decade, there has been a sharp increase in GNSS outages due to deliberate GNSS jamming. Receivers in LEO are uniquely situated to detect, classify and geolocate terrestrial GNSS jammers. This article explores two-step and direct geolocation of terrestrial GNSS jammers from LEO.
By Inside GNSS
This research analyzes the wide-area 2022 Texas GPS jamming incident using data from airborne receivers through Automatic Dependent Surveillance – Broadcast (ADS-B) and ground receivers at Continuous Operating Reference Stations (CORS).
By Inside GNSS
The new blockchain-based, decentralized CORS reference network provides low-cost access to triple-frequency full-constellation correction signals for centimeter accuracy, while also allowing users to earn financial rewards for contributing qualified CORS data back to GEODNET.
By Renee Knight
Experimental and simulation results from Starlink, OneWeb, Orbcomm and Iridium LEO satellite constellations are presented, demonstrating the efficacy and tremendous promise of the proposed LEO-agnostic blind opportunistic navigation frameworks.
By Inside GNSS
The Joint Research Centre of the European Commission tested seven advanced alternative sources of positioning navigation and timing (A-PNT) platforms through a performance assessment campaign, proving there are viable alternatives to GNSS available in the commercial market today.
By Inside GNSS
Using atmospheric polarization for GPS-denied navigation
By Inside GNSS
In today’s world of GNSS-contested environments and the emergence of multi-sensor fusion capabilities, there is a demand for filters that can navigate without the aid of GNSS. This article evaluates a complementary navigation filter designed to steer a sUAS autopilot in GNSS-contested environments.
By Inside GNSS
