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首页> 外文期刊>Journal of Spacecraft and Rockets >Precise Orbit Determination During Transfer Orbit Phase of GSAT-1
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Precise Orbit Determination During Transfer Orbit Phase of GSAT-1

机译：GSAT-1转移轨道阶段的精确轨道确定

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摘要

Orbit determination results are obtained for the GSAT-1 spacecraft launched by the Indian Space Research Organization using the first of its indigenously developed geosynchronous satellite launch vehicles. A description is given of the processes by which the mission operational ground-based orbit determination software estimated the satellite's achieved transfer orbit state. A comparison has been made between the determined transfer orbit elements and the injection parameters calculated immediately after launch by the inertial navigation system. A Monte Carlo simulation method that was used to estimate the errors in the orbit computed using the inertial navigation system data has been assessed. After injection, a major portion of the satellite's transfer orbit could not be tracked. To come to a definite conclusion of the achieved transfer orbit, investigations have been made using simulated tracking data and the actual tracking data of earlier, comparable, geostationary satellite missions. The orbit determination program used for the analyses is based on Cowell's formulation, the Gauss-Jackson numerical integration algorithm, and the batch weighted least-squares estimation technique. The performance of the tracking systems employed for the mission at Lake Cowichan, Canada; Fucino, Italy; Hassan, India; and Perth, Australia, has also been evaluated.
机译：印度空间研究组织使用其第一批本地开发的地球同步卫星运载火箭获得了GSAT-1航天器的轨道确定结果。给出了任务的描述，通过这些过程，任务运行地基轨道确定软件估计了卫星的已实现转移轨道状态。在确定的传递轨道元素与惯性导航系统发射后立即计算出的喷射参数之间进行了比较。评估了用于估计使用惯性导航系统数据计算出的轨道误差的蒙特卡洛模拟方法。注入后，无法跟踪卫星传输轨道的大部分。为了得出已确定的转移轨道的明确结论，已经使用模拟的跟踪数据和较早的，可比较的对地静止卫星飞行任务的实际跟踪数据进行了调查。用于分析的轨道确定程序基于Cowell的公式，Gauss-Jackson数值积分算法和批次加权最小二乘估计技术。在加拿大科威根湖执行任务所使用的跟踪系统的性能；意大利富奇诺;印度哈桑；澳大利亚的珀斯也受到了评估。

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