摘要
ＥＴＡＬＯＮ卫星是１９８９年发射的激光卫星，具有正球形、高质面比和轨道近圆等特点。其轨道倾角６５°，半长径为２．５万ｋｍ。其轨道不仅稳定，而且优化了覆盖欧亚大陆及太平洋地区的几何特性，适合于测定地球自转参数，更适合于全球测地和地壳运动的研究。本文研究了对Ｅ－ＴＡＬＯＮ卫星精密定轨的要求，如摄动模型的选取，数值积分中积分步长的选取等，利用１９９４年１０月ＥＴＡＬＯＮ－２的资料，对ＥＴＡＬＯＮ－２卫星进行了精密定轨，一个月（３１ｄ）弧长的定轨精度优于１０ｃｍ，１０天弧长定轨精度优于５ｃｍ。
Etalon 1 and Etalon 2 satellites were launched in 1989, they are an important laser ranging observatory purpose. Besides these properties of their spherical shape and high mass area ratio, they have other properties that their orbits are regular circular(e=0.0007) with inclination 64.9° and semimajor axes of 25500 km. Not only their orbits are stable, but also their orbits optimizes the property that they cover over Eurasia and Pacific distrist. They are suitable for parameters of Earth rotation and they are more suitable for the research of regional crustal motions and the global geodesic investigations. In order to fulfil the requirements of precise determining orbits of Etalon satellites, the researches on perturbations of Etalon satellites and on selecting integral step size of numerical integration were made. Using Etalon 2 SLR data in Oct., 1994, the precise orbit of Etalon 2 was determined. The accuracy of its orbit in 30 day's arc was less than 10 cm. And the accuracy of its orbit in 10 day's arc was less than 5 cm.
出处
《测绘学报》
EI
CSCD
北大核心
1997年第2期109-116,共8页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金
