Optimization method of measurement noise for detection and identification of SV clock anomaly

Abstract

This paper addresses a method for optimizing the measurement noise of reference receivers, in order to detect and identify the GPS clock anomaly in the DGPS reference station and integrity monitor environment. It estimates the real measurement noise that removes the uncommon error source from pseudorange measurement, to minimize the measurement noise. Based on the output of two reference receivers, it first removes the uncommon errors, and then optimizes the measurement noise by applying the correction data. Finally, it detects and identifies the satellite clock anomaly, using the optimized measurement noise.