Conjoint Analysis of GPS Based Orbit Determination among Traditional Methods

İbrahim ÖZ, Cevat ÖZARPA
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引用次数: 0

Abstract

Satellite orbits are subject to change due to external forces. Various data gathering and processing methods exist to determine a perturbed orbit. The operators need to estimate satellite orbits for safe orbital operations. Single station azimuth elevation and range, and range-to-range methods are two flight-proven commonly utilized methods among satellite operators. GPS signals in orbit determination of GEO communication satellite have become more popular recently. Much work validates GPS-based GEO orbit determination in different aspects. The validation of GPS-based orbit determination with flight-proven methods encourage the operator about fast switching utilization of the GPS method. This research evaluates performance of the GPS-based method by comparing it with flight-proven methods. The orbits of three communication satellites at different orbital slots were calculated using GPS-based, RNG-based, and AZEL-based methods. GPS-based determined orbit and RNG-based determined orbit RMSE of 3D differences are 75.887 m, 372.420m, and 768,223 m for Sat A, Sat B, and Sat C, respectively. Similarly, AZEL-based determşden orbit and GPS-based determined orbit RMSE of 3D position differences are 133.287 m, 242.076 m, and 764.866 m for Sat A, Sat B, and Sat C, respectively. The current study confirmed the finding's apparent support for GPS-based orbit determination. Flight-proven RNG and AZEL methods results in which satellite operators' well recognized, demonstrated evidence of the GPS-based orbit determination method. The results are in line with flight-proven AZEL and RNG method's orbit parameters. Finally, the result of our comparison of AZEL vs. GPS and RNG vs. GPS methods encourages the operators to utilize GPS-based navigation to determine communication satellite orbit precisely.
基于GPS的传统定轨方法的综合分析
由于外力的作用,卫星轨道会发生变化。存在各种数据收集和处理方法来确定摄动轨道。操作者需要估算卫星轨道以保证轨道运行的安全。单站方位角高程法和距离对距离法是卫星运营商常用的两种经过飞行验证的方法。近年来,GPS信号在地球同步轨道通信卫星定轨中的应用越来越广泛。许多工作从不同方面验证了基于gps的GEO定轨。利用飞行验证的GPS定轨方法的验证,鼓励了运营商快速切换利用GPS方法。本研究通过将基于gps的方法与经过飞行验证的方法进行比较来评估其性能。采用基于gps、基于rng和基于azel的方法计算了三颗通信卫星在不同轨道槽的轨道。Sat A、Sat B和Sat C基于gps确定轨道和rng确定轨道的三维差值RMSE分别为75.887 m、372.420m和768223 m。同样,卫星A、卫星B和卫星C基于azel确定轨道和gps确定轨道的三维位置差RMSE分别为133.287 m、242.076 m和764.866 m。目前的研究证实了这一发现对基于gps的轨道确定的明显支持。经过飞行验证的RNG和AZEL方法的结果是,卫星运营商很好地认可了基于gps的轨道确定方法。结果与飞行验证的AZEL和RNG方法的轨道参数一致。最后,我们对AZEL与GPS、RNG与GPS方法的比较结果鼓励运营商利用基于GPS的导航来精确确定通信卫星轨道。
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