卫星测定轨中两种对流层延迟估算方法的比较

Comparison of Two Methods of Estimating Tropospheric Delay for Satellite Orbit Determination

分别利用昆明观测站实测的气象数据和GPS的观测资料,用Saastamoinen模型和GAMIT软件计算天顶对流层延迟及在"鑫诺一号"等地球同步轨道卫星方向的对流层延迟,以IGS公布的距观测站数十米远的昆明IGS站天顶对流层延迟为验证依据,进行了比较分析,得出了一些对卫星精密测定轨很有意义的结论。

Two different strategies have been implemented for estimating zenith tropospheric delay and slant path delay in the direction of the Geostationary Earth Orbit(GEO) satellite 'SINOSAT 1' etc. the one is Saastamoinen model using meteorology data at kunming observation station,the other is GAMIT software using GPS observation data.and the IGS product,zenith path delay(ZPD) of KUNM site,as a validation,these rusults were compared and analysed,It showed that the methods and conclusion are of certain significance for satellite orbit determination.