附加辅助层析区域提高射线利用率的水汽反演方法

发布时间：2018-06-05 05:44

本文选题：水汽反演 + CORS　；参考：《武汉大学学报(信息科学版)》2017年09期

【摘要】：在已有的全球导航卫星系统水汽反演技术中,能够利用的观测值是完整穿过整个层析区域的卫星射线。由于卫星、接收机几何位置分布以及层析区域选择的特定性,许多卫星射线是从层析区域侧面穿出,这些射线通常当作无效信息被剔除,降低了层析结果的精度。针对该缺点,提出并实现了一种附加辅助层析区域提高射线利用率的水汽反演方法,使从研究区域侧面穿出的信号信息也可以被利用。基于美国得克萨斯州(Texas)地区的连续运行参考站(Continuously Operation Reference Stations,CORS)网的实测数据,结合层析区域内的无线电探空仪数据进行实验,结果表明,该方法能够提高水汽反演结果的精度,其均方根误差的改善率为14.6%。
[Abstract]:In the existing global navigation satellite system (GNSS) water vapor inversion techniques, the observed values can be used as satellite rays that pass through the entire tomography region. Because of the geometric position distribution of the satellite receiver and the specificity of the selection of the tomography region many satellite rays are perforated from the side of the tomography region and these rays are usually removed as invalid information which reduces the accuracy of the tomography results. In order to solve this problem, a water vapor inversion method is proposed and implemented to improve the ray utilization rate of the study area, so that the signal information from the side of the study area can also be used. Based on the measured data of continuously Operation Reference stations in Texas, Texas, United States of America, combined with radiosonde data in chromatographic region, the results show that the method can improve the accuracy of water vapor inversion. The improvement rate of root mean square error is 14. 6%.
【作者单位】：武汉大学测绘学院;西安科技大学测绘科学与技术学院;
【基金】：国家自然科学基金(41174012,41274022) 江西省自然科学基金(20151BAB213031)~~
【分类号】：P228.4;P412.27

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