Finding Source of Electromagnetic Interference (EMI) to GPS Using a Network Sensors

Shau-Shiun Jan and Per Enge

Abstract:	Any electromagnetic interference (EMI) to GPS must invoke a fast location and removal response, because of the high military and civilian reliance on GPS. In this report, we present an approach, which is based on deploying a network of sensors to estimate the location of EMI source. We believe that this approach provides some unique advantages. First, it includes the possibility of using a terrestrial and/or airborne network for finding interference to airborne receivers. Since a terrestrial network could surround an airport with a continuous interference finding capability, such a network would be much less expensive than monitoring with a continuously airborne fleet of even unmanned air vehicles. It would also provide a quicker response than a strategy based on dispatching aircraft after the onset of interference. Such a terrestrial network need not be expensive since it could be based on an abundance of cheap sensors rather than a few sensors at hardened sites. Second, the combination of different sensors may improve the positioning performance. In particular, our approach is likely to outperform the proposal to estimate interference location by measuring power received by a top-mounted antenna on a banking aircraft.
Published in:	Proceedings of the 2001 National Technical Meeting of The Institute of Navigation January 22 - 24, 2001 Westin Long Beach Hotel Long Beach, CA
Pages:	533 - 540
Cite this article:	Jan, Shau-Shiun, Enge, Per, "Finding Source of Electromagnetic Interference (EMI) to GPS Using a Network Sensors," Proceedings of the 2001 National Technical Meeting of The Institute of Navigation, Long Beach, CA, January 2001, pp. 533-540.
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