Analyses of the sensitivity of multi-constellation advanced receiver autonomous integrity monitoring vertical protection level availability to error parameters and a failure model over China

摘要

The availability of advanced receiver autonomous integrity monitoring for vertical guidance down to altitudes of 200 ft(LPV-200) is discussed using real satellite orbit/ephemeris data collected at eight international global navigation satellitesystem service stations across China. Analyses were conducted for the availability of multi-constellation advanced receiver autonomous integrity monitoring and multi-fault advanced receiver autonomous integrity monitoring, and the sensitivity of availability in response to changes in error model parameters (i.e. user range accuracy, user range error, BiasNom and Bias-Max) was used to compute the vertical protection level. The results demonstrated that advanced receiverautonomous integrity monitoring availability based on multiple constellations met the requirements of LPV-200 despitemultiple-fault detections that reduced the availability of the advanced receiver autonomous integrity monitoring algorithm; the advanced receiver autonomous integrity monitoring availability thresholds of the user range error and BiasNom used for accuracy were more relevant to geographic information than the user range accuracy and Bias-Max usedfor integrity at the eight international global navigation satellite system service stations. Finally, the possibility of using theadvanced receiver autonomous integrity monitoring algorithm for a Category III navigation standard is discussed usingtwo sets of predicted errors, revealing that the algorithm could be used in 79% of China.