| 关增社1,2， 王 庆1， 潘树国1， 李传君1 |
（1. 东南大学 仪器科学与工程学院，江苏 南京 210096； 2.中国人民解放军95972部队，甘肃 酒泉 735018） |
 摘要：为了提高单频GPS单点定位精度，提出一种基于星间求差的GPS自差分方法。利用测站在已知点的观测数据，通过对不同卫星的观测方程进行求差，消去接收机钟差，获得星间差分改正值，代入后续历元来提高单频GPS的定位精度，从而实现类似差分的定位效果。试验结果表明：这种自差分方法在一定时间内可以实现亚米级的定位精度，能够满足中等精度测量的要求。 |
| 关键词：星间求差；自差分；DGPS |
| 中图分类号：P228.4 文献标识码：A 文章编号：1000-8829(2008)05-0052-03 |
| Self-Differential of Single Frequency GPS Based on Difference Between Satellites |
| GUAN Zeng-she1,2， WANG Qing1， PAN Shu-guo1， LI Chuan-jun1 |
| （1. School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China; 2. No.95972 Unit of PLA, Jiuquan 735018, China） |
| Abstract：In order to improve the precision of the single frequency GPS,a method to achieve self-difference based on difference between satellites is presented.With the observational data on the known position,the differential corrected value between satellites was obtained by getting the differences of different satellites’ observation equations and clearing up the clock error.By taking it into subsequent epochs,it increased the precision of single frequency GPS and realized the positioning performance of DGPS similarly.The experiment results indicate that the positioning precision of sub-meter can be attained by this means and can meet the requirement of the surveying work of middling precision. |
| Key words：difference between satellites; self-differential; DGPS |
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