摘要
GPS卫星星历是影响GPS定位精度和实时性的主要因素之一。通过比较现有GPS卫星星历的时延性,得出只有广播星历和IGS提供的预报星历才能满足GPS定位的实时性要求,并利用实际数据分析了这两种星历对实时定位的精度影响,为今后的GPS实时定位工作提供了帮助。
Ephemeris ot GPS satelhte is one of the mainly factors effectlng on the accuracy and latency ot positioning. Comparing the latency of ephemeris available, we find only broadcast ephemeris and forecasting ephemeris provided by International GPS Service （IGS） can meet the need of real- time baseline solution. The accuracy of the baseline solution with the two ephemeris are analyzed by the test using actual data. It can be useful to realtime positioning.
出处
《城市勘测》
2007年第1期13-14,31,共3页
Urban Geotechnical Investigation & Surveying
关键词
GPS
卫星星历
实时定位
GPS
ephemeris of satellite
realtime positioning
