摘要
利用国际GPS地球动力学服务(International GPS service(IGS)for geodynamics)提供的广播星历和精密星历数据,分析GPS广播星历的轨道精度及变化规律。广播星历的轨道精度一般在5 m左右,且明显表现出周期性变化规律。另外,从单点定位的原理出发分析了GPS广播星历误差对单点定位精度的影响。
Using the broadcast ephemeris and precise ephemeris provided by the international GPS service for geodynamics （IGS）, the precision and change law of the orbit computed by GPS broadcast ephemeris are analyzed. The orbit precision of broadcast ephemeris is about 5 meters and the orbit errors have the change law of periodicity. In addition, based on the principle of point positioning the effect of broadcast ephemeris error on point positioning is analyzed.
出处
《测绘工程》
CSCD
2007年第6期16-18,共3页
Engineering of Surveying and Mapping
基金
国家教育部博士点基金(20040290503)
关键词
广播星历误差
精密星历
单点定位
broadcast ephemeris error
precise ephemeris
point positioning
