Improved effectiveness of GPS RAIM through ridge regression signal processingA measurement processing method has been developed which markedly improves the GPS Receiver Autonomous Integrity Monitoring (RAIM) software-based algorithm system's effectiveness in detecting satellite signal failures. Detection is via the consistency of a redundant set of pseudorange measurements. When five satellites are in view, five different subsolutions can be calculated; the integrity alarm is triggered on the basis of subsolution comparisons. Because a poor distribution of the satellites also causes RAIM subsolution scattering, a methodology for selecting the covariance matrix is presented which incorporates ridge regression into a Kalman filter.
Document ID
19900056657
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kelly, Robert J. (Allied-Signal Aerospace Co. Baltimore, MD, United States)
Van Graas, Frank (Ohio Univ. Athens, OH, United States)
Kuhl, Mark R. (Ohio University Athens, United States)