Small ceramic patch elements offer nearly perfect single-frequency receive characteristics and have become the standard for GPS L1 antennas. However, the new generation of GNSS receivers now being introduced track many satellites in multiple constellations. Are these narrow-band devices up to the...More>>

Disruption created by intentional generation of fake GPS signals could have serious economic consequences. This article discusses how typical civil GPS receivers respond to an advanced civil GPS spoofing attack, and four techniques to counter such attacks: spread-spectrum security codes, navigation...More>>

ITT Exelis and Chronos Technology Ltd. have agreed to jointly pursue and develop product offerings for the GNSS interference, detection and mitigation (IDM) market. Satellite-based positioning, navigation and timing (PNT) systems are vulnerable to many factors, such as signals jamming, resulting in...More>>

Most anti-spoofing techniques are computationally complicated or limited to a specific spoofing scenario. A new approach uses a two-antenna array to steer a null toward the direction of the spoofing signals, taking advantage of the spatial filtering and the periodicity of the authentic and spoofing...More>>

A one-chip multiconstellation GNSS receiver, now in volume production, has been tested in severe urban environments to demonstrate the benefits of multiconstellation operation in a consumer receiver. Bringing combined GPS/GLONASS from a few tens of thousands of surveying receivers to many millions...More>>

The fifth European workshop on GNSS signals and signal processing, GNSS Signals 2011, is seeking papers. The workshop will be held December 8-9, 2011, at L'Ecole Nationale de l'Aviation Civile (ENAC), in Toulouse, France. The focus of the workshop is on GNSS signal design and signal processing....More>>

Using signal-to-noise measurements from a single commercial-grade L1 GPS receiver, it is possible to detect interference or jamming that is above the thermal noise floor and below a power that causes loss of position.More>>

NPEF LightSquared ReportMore>>

The National PNT Engineering Forum (NPEF) LightSquared Working Group report on GPS testing states, "At the conclusion of this effort, significant concerns remain that operation of an ATC integrated service as originally envisioned by the FCC cannot successfully coexist with GPS." The report calls...More>>

Spectracom, a global provider of time and frequency test and measurement solutions, will make available its new 16-channel GPS constellation simulator, the Pendulum GSG-55, in March. The GSG-55 is the latest in the Pendulum line of GPS receiver test instruments and part of its solution set for...More>>