Signal Deformation Monitoring for Anomalous Multipath Threats

R. Eric Phelts and Todd Walter

Peer Reviewed

Abstract:	The current WAAS signal quality monitor algorithm was designed to mitigate anomalous signal distortions. This paper assesses the ability of this monitor mitigate distortions produced from satellite-induced multipath. Leveraging experience from the SVN-49 anomaly, a single-reflection signal threat model is defined and expanded to include an elevation-angle dependence, which may potentially reduce observability of distortions viewed from widely-distributed monitor receivers. Next, the range errors for both singlefrequency and dual-frequency aviation users are modeled relative to the monitor’s ability to detect them. It is shown that the existing WAAS signal deformation monitor can protect both single and dualfrequency aviation users against a wide range of SVinduced, single-reflection multipath parameters despite significant attenuation of monitor sensitivity due to elevation-angle dependence.
Published in:	Proceedings of the ION 2019 Pacific PNT Meeting April 8 - 11, 2019 Hilton Waikiki Beach Honolulu, Hawaii
Pages:	1023 - 1030
Cite this article:	Phelts, R. Eric, Walter, Todd, "Signal Deformation Monitoring for Anomalous Multipath Threats," Proceedings of the ION 2019 Pacific PNT Meeting, Honolulu, Hawaii, April 2019, pp. 1023-1030. https://doi.org/10.33012/2019.16853
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