摘要
GrafNav软件是目前国内广泛采用的GPS事后处理软件。在实际使用中,该软件对于基准站和移动站时间采样不同步数据的处理存在严重问题,处理精度严重超差甚至无法进行正常解算。为了使基准站与移动站的采样时刻对齐,根据CA码伪距特性,提出了一种有效的解决方法即阶Lagrange插值算法,并对算法进行了理论分析。为了验证整点对齐算法的可靠性,引入A、B两套自编软件,对整点对齐处理后的数据应用B软件进行了处理,将结果与A软件处理结果进行比对,同时对处理结果进行了插值外推,将外推结果与未经整点对齐处理的GrafNav软件结果进行比对,从而证明了算法的正确性。实验结果表明,插值后数据的定位精度可控制在分米级以内,满足目前各类试验的要求。
GrafNav software, as a GPS data processing software, has very serious problem in dealing with asynchronous sampling data. In order to alignment the sampling time of master station with the remote station, an effective method（Lagrange interpolation） was presented based on the characteristic of CA code, and its theoretical analysis was made. Two sets of software A and B were introduced to validate the method, and the results of synchronous data using software B were compared with the data using software A. Meanwhile, the interpolate and extrapolate results were compared with the asynchronous data using GrafNav software which prove the correctness of the method. The results of experiment show that the precision of interpolation data can be controlled in decimeter, which can satisfy the present precision requirements of various experiments.
出处
《中国惯性技术学报》
EI
CSCD
2008年第2期200-203,共4页
Journal of Chinese Inertial Technology
