BDS/GPS组合中长基线解算性能分析

Performance Analysis of Medium-long Baseline Based on Integrated BDS/GPS

分别阐述了BDS/GPS组合定位函数模型和随机模型的相关理论,并进行了相应的公式推导;在此基础上,编写了BDS/GPS组合定位程序处理实测BDS/GPS组合中长基线数据。最后从空间位置精度因子、整周模糊度固定以及定位精度等多方面分析BDS/GPS组合定位性能。结果表明:BDS/GPS组合的PDOP值要小于单个系统的值,且稳定性较好;新升起的低高度角卫星,能够更加快速有效的固定模糊度;BDS/GPS系统定位精度较单个系统有所提高,且中长基线定位精度在毫米级精度,长基线在厘米级精度。

Expounding the BDS/GPS integrated positioning functional model and stochastic model,there fundamental theories and corresponding formulas were illustrated.On the basis of these,a BDS/GPS integrated positioning program was written to process the measured BDS/GPS medium-long baseline data.Ultimately,BDS/GPS integrated positioning performance synthetically had been analyzed from the space position dilution of precision（PDOP）,the fixation of integer ambiguity and positioning accuracy and many other aspects.The results showed that the value of BDS/GPS combination of PDOP is less than the value of a single system and had better stability and the observation precision of dual system is better than a single system.New rising low altitude angle satellites,can fix ambiguity more quickly and efficiently.The accuracy of BDS/GPS combination positioning is better than a single system,and the positioning accuracy of medium-long baseline in mm-level accuracy and the positioning accuracy of long baseline in cm-level accuracy.