Title: Vertical Integrity Monitoring with Direct Positioning
Author(s): Arthur Hsi-Ping Chu, Grace Xingxin Gao
Published in: Proceedings of IEEE/ION PLANS 2018
April 23 - 26, 2018
Hyatt Regency Hotel
Monterey, CA
Pages: 367 - 373
Cite this article: Chu, Arthur Hsi-Ping, Gao, Grace Xingxin, "Vertical Integrity Monitoring with Direct Positioning," Proceedings of IEEE/ION PLANS 2018, Monterey, CA, April 2018, pp. 367-373.
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Abstract: The monitoring of GPS integrity is critical for preventing Harzardously Misleading Information (HMI) in safety-oflife applications. We propose an integrity monitoring algorithm based on Direct Position Estimation (DPE), an unconventional GPS receiver architecture. Without the need for intermediate pseudorange models, which are essential under conventional schemes, we are able to account for all sources of error collectively in the position domain, enabling more thorough protection against different modes of integrity threats. Using the correlation manifold provided by a generic DPE receiver, our algorithm characterizes the deformation of the manifold with a Gaussian distribution, which reflects the trustworthiness of the DPE navigation solution. In this paper, we focus on the vertical aspect of our DPE-based integrity monitoring algorithm. This proposed algorithm was verified with live data to be able to provide indication for the presence of integrity threats, such as a degrading signal environment.