摘要
在考虑地面站资源受限的基础上,提出了基于地标信息对静止轨道遥感卫星进行测定轨的基本原理,给出了根据地标图像和地面站测距结果进行定轨的计算模型。分析了卫星姿态确定误差、卫星及相机结构变形误差、相机空间分辨率、大气折射、地面站测距误差对该方法测定轨精度的影响。对地标和地面站个数多种组合以及无地面站情况进行了定轨仿真,并与自主轨道递推结果比较,结果表明:用基于地标的测定轨方法对静止轨道遥感卫星的定轨精度可达400m,并不受地面站资源限制和时间约束,多天自主定轨精度高于星上自主轨道模型递推结果。
Based on the observation station's limiting factor,the method that using landmark's(LM)image information to determinate remote sensing geostationary(GEO)satellites' orbit was put forward in this paper.The model to determination the orbit by LM's image and observation station's range measure value was presented.The influence by satellite's attitude determination error,satellite and camera's structure distortion,camera's resolving power,atmosphere refraction,range measure data was analyzed.The orbit determination results by multi combination of LM and observation station,and compare with freedom orbit account were simulated.It was showed that the orbit determination precision could achieve 400 mbased on the LM information,and the method proposed was freedom of observation station's limited and time restrict,which the precision was higher than the satellite's freedom orbit determination.
引文
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