TAG: rfi

ICAO requests information on unmanned traffic management systems

June 14, 2017By

During AUVSI Xponential 2017, the International Civil Aviation Organization (ICAO), a specialized agency of the United Nations, announced a Request for Information (RFI) on traffic management systems for unmanned aircraft systems (UAS). The RFI is an opportunity for industry and governments to submit ideas to define the issues so that global solutions can be proposed, debated and agreed on. As UAS... read more

DOT conducts GPS backup study

April 14, 2017By

The U.S. Department of Transportation (DOT) is studying responses to its November 2016 request for information concerning back-up systems for GPS. DoT is investigating possibilities and practicalities of using one or more positioning, navigation and timing (PNT) technologies to ensure PNT resiliency for critical infrastructure in the event of a temporary disruption in GPS availability. The filing period closed Jan.... read more

Tracking RFI: Interference localization using a CRPA

A controlled radiation-pattern antenna can preserve GNSS positioning while providing at least an azimuth angle towards an interference source. If integrated with an attitude and heading reference system, only a few lines of position pointing towards the RFI source could provide a fast indication of the probable ground location. read more

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Expert Advice: The Impact of RFI on GNSS Receivers

April 1, 2015By

By Fabio Dovis When subjected to very strong interference, a GNSS receiver can be totally blinded and stop working. This is often the scope of intentional jammers. However, in a number of cases the presence of interference is severe enough to significantly decrease receiver performance, but not so much as to make the receiver lose its lock on the satellite signals... read more