CAJ | 학술논문

利用北京房山地区9个全球定位系统观测站组成的实验站网，研究GPS水汽层析网格的划分方法，采用垂直均匀和垂直非均匀两种分层方法，分析GPS层析网格垂直分层对水汽层析结果的影响。结果表明：均匀和非均匀垂直分层方法得到的GPS水汽层析结果均是可靠的，均可以与探空水汽结果进行比较。但垂直非均匀分层更符合大气水汽的实际分布特征，层析解算精度更高，尤其对测站高度差较小的GPS站网，尽量选择垂直非均匀分层方法。垂直均匀和垂直非均匀分层方法均可以为北京地区GPS层析网格垂直划分提供参考。
이용북경방산지구9개전구정위계통관측참조성적실험참망，연구GPS수기층석망격적화분방법，채용수직균균화수직비균균량충분층방법，분석GPS층석망격수직분층대수기층석결과적영향。결과표명：균균화비균균수직분층방법득도적GPS수기층석결과균시가고적，균가이여탐공수기결과진행비교。단수직비균균분층경부합대기수기적실제분포특정，층석해산정도경고，우기대측참고도차교소적GPS참망，진량선택수직비균균분층방법。수직균균화수직비균균분층방법균가이위북경지구GPS층석망격수직화분제공삼고。
A Global Positioning System (GPS)experimental station network including nine GPS stations in Fangs-han district of Beijing was used for a study on GPS tomography grid.Effects of vertical stratification on the water vapor tomography results were analyzed in terms of methods of a vertically uniform and a non-uniform stratifica-tion.The results show that GPS water vapor tomography results obtained by two vertical stratification methods are reliable,and they are consistent with observed water vapor from radiosonde stations.However,tomography grid of vertically non-uniform stratification is more accurate compared with the observed atmospheric water vapor distribu-tion,and the results are more precise compared with that of vertically non-uniform stratification,especially for GPS stations with less altitude differences.Thus,the vertically non-uniform stratification method should be chosen for these stations,although two methods both can provide references for the GPS tomography grid in Beijing.