B: Applications Archives - Page 2 of 117 - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

B: Applications

February 4, 2021

Supercorrelation Plus 3D Mapping-Aided GNSS

Inertially-aided extended coherent integration makes a GNSS receiver more sensitive to directly received signals than to reflected signals whenever the receiver is moving. 3D-mapping-aided GNSS uses predictions of which signals are NLOS to enhance the positioning algorithms. Both techniques can improve positioning accuracy in dense urban areas by more than a factor of two. This article investigates the benefits of combining them.

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By Inside GNSS
January 26, 2021

LEO PNT Performance Report: STL

Alternative PNT from low-Earth orbit (LEO) satellites is being developed or proposed by various entities. Satelles delivers a fully operational Satellite Time and Location (STL) service to back up or augment GNSS, strengthening the resilience of critical infrastructure. This article details STL’s timing synchronization performance with different types of user equipment.

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By Inside GNSS

DOT Report on Backup PNT Technologies Finds NextNav Performs Best, Calls for Synthesis and Synergy

The Department of Transportation (DOT) submitted its “National Timing Resilience and Security Act: Roadmap to Implementation” report to Congress in mid-January. Following a competitive application process, demonstrations and review of 11 candidate technologies to back up GPS capabilities, the DOT concluded that “none of the systems can universally backup the positioning and navigations capabilities provided byGPS and its augmentations.” However, “all vendors demonstrated some PNT performance of value, but only one vendor, NextNav, demonstrated in all applicable use case scenarios.”

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By Inside GNSS

Updated Galileo ICD Previews New Features for Faster TTFF in 2023

The European GNSS Agency (GSA) released a new Galileo Open Service Signal in Space Interface Control Document (OS SIS ICD), the second issue of this document geared towards GNSS receiver manufacturers. Although the modified signals are not yet broadcast by Galileo satellites, the ICD will allow GNSS receiver manufacturers to prepare for the improved signals, set for debut in 2023.

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By Inside GNSS