Research on GNSS Anomaly Data Detection Method Based on Different Control Chart
Control charts are a mature method for detecting mutation points and have been widely used in the detection of anomalous data of coordinate sequences in the Global Navigation Satellite System(GNSS).The article adopts three kinds of widely used control charts,namely cumulative sum control charts,Shewhart control charts,and exponential weighted moving average control charts.Mainly by adding different multiples of standard deviation offsets to GNSS anomaly data for experimentation and comparative analysis,the results show that the CUSUM control charts have higher accuracy for standard deviation offsets of less than 3 times,followed by the EWMA control charts,but the CUSUM control charts can only detect an offset of 0.5 times at minimum.For stand-ard deviation offsets above 3 times,Shewhart and EWMA control charts have similar results,while CUSUM control charts lead to an increase in false positives with increasing offsets.
GNSSabnormal dataCUSUM control chartsShewhart control chartsEWMA control charts
国家科技期刊平台
NSTL
万方数据
维普
