BDS and GPS Ultra-Short Baseline Measurement Performance Comparison and Analysis

摘要

Since BeiDou satellite navigation system (BDS), which is independently developed and being implemented in China, successfully realizes the coverage in the Asia-Pacific region at the end of 2012, it has been widely used in the national economy and society, with that the whole system runs stably, and is in good condition. In order to verify the precision level of the positioning solution of the second generation BeiDou system (BD-2) in the condition of short baseline, based on the measured data, through the use of self-written baseline solving program, we get the short baseline calculating results under the condition of the static and dynamic experiments respectively based on BD-2 and GPS. Then through the comprehensive comparison of the above results, we analyze the accuracy and reliability of ultra-short baseline results based on BD-2. The experimental results show that, the reliability of the short baseline solution of BD-2 is rather equal compared with GPS. Under the static condition, the precision of ultra-short baseline solution of BDS is slightly worse than GPS; under the dynamic condition, that of BDS in E and N directions are rather equal to that of GPS, while in the U direction it is not as good as GPS.