基于北斗卫星的水汽探测性能分析

本文利用北斗试验网的数据,结合探空观测,对北斗系统与GPS系统,北斗、GPS与探空系统之间进行详细的比较分析,对北斗水汽探测性能及精度给出初步分析结果。北斗系统与GPS系统及探空系统大气可降水量的探测结果较一致,很好地反映了大气可降水量的变化情况;北斗系统解算出的大气可降水量大于GPS系统,两个系统间存在2~3.3 mm的系统误差,水汽含量较低时,一致性更好;北斗系统与探空的系统误差和标准偏差较大,定位定轨模型有待优化,系统稳定性有待提高。

Analysis on Performance of Water Vapor Detection Based on BeiDou Satellite

The ground-based GNSS remote sensing water vapor detection got high spatial and temporal resolution atmospheric water vapor data by acquisition signal of satellite navigation system, made up the shortage of conventional sounding in space and time, which had important application value to the weather forecasting, climate research and artificial influence on weather.This paper used BeiDou experimental network data, combined with the radiosonde observation, made detailed comparative analysis among BeiDou, GPS and sounding system, gave the preliminary results of performance and accuracy of BeiDou vapor detection.The result of PWV were consistent detected by BeiDou, GPS and radiosonde, which well reflected the change regularity of PWV. PWV detected by BeiDou was more than that of GPS, there was a system error of 2-3.3 mm between the two systems. The two systems were more consistent when the PWV relatively lower. There were systematic errors and standard deviation between the water vapor detection by BeiDou and radiosonde. Positioning and orbit determination model need to be optimized. The stability of the system need to be improved.