对流层模型评估及其在GNSS精密单点定位中的应用

发布时间：2018-03-23 13:31

本文选题：水汽辐射计　切入点：对流层模型　出处：《大地测量与地球动力学》2016年03期

【摘要】：以水汽辐射计(WVR)精确测定的天顶方向延迟值作为参考,评估Saastamoinen、GPT2、EGNOS、UNB3M四种常用对流层模型在上海地区的改正精度;并将WVR观测值及以上4种对流层模型计算的对流层延迟值作为真值应用到GNSS精密单点定位(PPP)中,评估其对定位精度的影响。比较发现,GPT2模型的对流层改正精度比其余3种要好,其天顶干延迟(ZHD)的偏差均值与中误差分别为-0.11cm、±0.75cm,天顶湿延迟(ZWD)的平均偏差与中误差分别为-2.34cm、±7.67cm;和传统的PPP结果相比,采用WVR对流层观测值的定位精度提高了16%。
[Abstract]:The accuracy of correction of four common tropospheric models Saastamoinende GPT2EGNOSUNB3M in Shanghai is evaluated with reference to the zenith direction delay value accurately measured by water vapor radiometer (WVRV). The WVR observations and the tropospheric delay calculated by the above four tropospheric models are applied as the true values to evaluate the effect of the tropospheric delay on the positioning accuracy of the GNSS precise single point positioning system. It is found that the tropospheric correction accuracy of the GPT2 model is better than that of the other three tropospheric models. The mean deviation and median error of ZHD are -0.11 cm, 卤0.75 cm, and the average deviation and median error of ZHD are -2.34 cm, 卤7.67 cm, respectively. Compared with the traditional PPP results, the positioning accuracy of the tropospheric observations using WVR is improved 16%.
【作者单位】：同济大学测绘与地理信息学院;中国科学院上海天文台;
【基金】：中国科学院百人计划国家863计划(2013AA122402,2014AA123102) 国家自然科学基金(11273046,41174024) 上海市科学技术委员会项目(12DZ2273300,13PJ1409900)~~
【分类号】：P228.4

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