A Method to Improve the Utilization of Observation for Water Vapor Tomography by Adding Assisted Tomographic Area

作者：Zhao Qingzhi; Yao Yibin; Luo Yiyong

来源：Geomatics and Information Science of Wuhan University, 2017, 42(9): 1203-1208 and 1222.

DOI：10.13203/j.whugis20150592

• CORS
• Geometric distribution
• Global Navigation Satellite Systems
• Root mean square errors
• Satellite constellations
• Signal information
• Tomographic techniques
• Water vapor tomographies

In existing Global Navigation Satellite System (GNSS) water vapor tomographic techniques, only signals which penetrate the entire research area are used. Due to the specific geometric distribution of satellite constellations and receivers as well as the specificity of tomography area, many signals penetrating from the side of a research area are excluded as ineffective information, which undermines the tomographic result. To solve this issue, a method is proposed for improving the utilization of signal rays by adding an assisted tomographic area, which allows the signal information crossed from the side of a research area to be utilized as well. An experiment using data from the Continuously Operation Reference Stations (CORS) network of Texas in UAS, is compared with radiosonde data of 72 249. The results show that the proposed method can enhance the accuracy of tomographic results, the improvement rate of Root Mean Square Error (RMS) was14.6%.

• 出版日期2017