TAG: RAIM

GNSS Lies, GNSS Truth

November 6, 2014By
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A new method detects spoofing attacks that are resistant to standard RAIM technique and can sense an attack in a fraction of a second without external aiding. The signal-in-space properties used to detect spoofing are the relationships of the signal arrival directions to the vector that points from one antenna to the other. A real-time implementation succeeded against live-signal spoofing attacks aboard a superyacht cruising in international waters. read more

Pratap Misra Honored with ION Kepler Award 

September 15, 2014By
Pratap Misra, 2014 Kepler Award recipient.

The Institute of Navigation’s (ION) Satellite Division awarded Pratap Misra its Johannes Kepler Award on September 12 at the ION GNSS+ Conference in Tampa, Florida, for his contributions to satellite navigation education, the understanding of GLONASS, and receiver autonomous integrity monitoring. Misra is credited with tracking GLONASS satellites using the AF Deep Space Tracking Network to determine their orbits in the... read more

Altus Positioning Systems Pinpoints Cause for GLONASS Default

April 4, 2014By

Regarding the April 1–2 11-hour downtime for the full GLONASS constellation, president and CEO Neil Vancans of Altus Positioning Systems provides this additional information: “From the reports on GLONASS problems, we have an explanation that may be used in our technical support replies: “Our analysis reveals the GLONASS integration algorithms skipped an interval of around 1.5 minutes at the control... read more

Expert Advice: Which Is the Best GNSS Receiver?

October 1, 2013By
Jaynata Ray

By Jayanta Ray Aerospace GNSS receivers constitute a class apart, compared to their more popular relatives used in automotive, cell phone, or survey applications. Automotive and cell-phone receivers can sometimes provide position information even in indoor environments. The survey class of receivers provides centimeter-level accuracies. However, neither group can guarantee the reliability and integrity of the position solution, and users... read more