GPS卫星精密钟差的加密方法研究

Research on Densification Methods for Precise Clock Bias of GPS Satellites

分别用四种插值拟合的算法将IGS提供的间隔15 min的精密卫星钟差加密到5min和30s,并用德国GFZ(Geo Forschungs Zentrum)数据中心提供的30s的精密卫星钟差作为真值与之比较,分析了四种算法对变化趋势不同的卫星钟差的加密效果,以适合不同特点卫星钟差的算法。

Four interpolation methods are used to densify the precise 15 minutes interval clock bias of GPS satellites, which supplied by IGS, to the ones of 5 minutes interval and 30 seconds interval. The data, which supplied by the data center of German GFZ（GeoForsehungsZentrum）, regarded as the true value, compares with the interpolation value. With analyzing the effect of four methods of satellite clock bias, which have different tendency, the suit method is chosen for satellite clock bias having different character.