CAJ | 학술논문

设计了利用对流层散射通信进行双向时间比对方法，对比分析了NMF、VMF1和GMF共3种映射函数特征和参数选取方法，简化并假设对流层大气层，提出了基于映射函数进行对流层双向时间比对斜延迟分析的方法，选取东北亚中纬度地区的4个代表性GPS测站进行了对比分析。根据所选测站的地理位置情况和探空数据分析表明，所选测站间的斜延迟呈现年周期余弦函数分布特征，且大致呈夏季最大冬季最小分布，且3种映射函数下斜延迟大致相同，GMF有实时获得的优势。研究了高度角变化条件下的斜延迟误差分布，运算结果表明斜延迟误差也近似呈余弦函数分布，且夏季最小冬季最大，在误差角为0.01°时，最大延迟误差对应的时延约为0.2 ns。
설계료이용대류층산사통신진행쌍향시간비대방법，대비분석료NMF、VMF1화GMF공3충영사함수특정화삼수선취방법，간화병가설대류층대기층，제출료기우영사함수진행대류층쌍향시간비대사연지분석적방법，선취동북아중위도지구적4개대표성GPS측참진행료대비분석。근거소선측참적지리위치정황화탐공수거분석표명，소선측참간적사연지정현년주기여현함수분포특정，차대치정하계최대동계최소분포，차3충영사함수하사연지대치상동，GMF유실시획득적우세。연구료고도각변화조건하적사연지오차분포，운산결과표명사연지오차야근사정여현함수분포，차하계최소동계최대，재오차각위0.01°시，최대연지오차대응적시연약위0.2 ns。
The characters and parameter selection of NMF (Niell mapping function), VMF1 (Vienna mapping functions 1) and GMF (global mapping function) are compared and analyzed. By simplfying troposphere atmosphere into stratified atmosphere, a method for analyzing slant propagation delay (SPD) in two way time troposphere transfer (TWT3) is proposed based mapping functions. The geographical conditions and radiosonde data of four representative stations in the mid latitude areas of northeast Asian analyzed and compared. The results reveal that the SPD is approximately subject to the distribution of cosine function with a yearly period and maximum in summer & minimum in winter, and the three mapping functions (NMF, VMF1, and GMF) in the chosen stations shows roughly the same SPD but GMF shows the superiority of real-time obtaining parameters. The SPD errors distribution in the condition that elevation angle changes is studied. The results show that the maximum delay error of SPD is 0.2 ns while the error angle is 0.01 degree.