| Aerospace Technology |
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| Performance assessment of BeiDou B3-based real-time orbit determination for LEO satellites |
Xin YU( ),Xiao-jun JIN*(),Shi-ming MO,Wei ZHANG,Zhao-bin XU,Zhong-he JIN |
| Micro-satellite Research Center, Zhejiang University, Hangzhou 310027, China |
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Abstract Real-time orbit determination simulations were conducted using the space-borne GPS/BDS (BeiDou navigation satellite system) receiver developed for the ZDPS-3 mission. The orbit determination performance based on BDS, especially the B3 frequency, was evaluated. As results, with the higher chip rate, the anti-noise performance of pseudo-noise code of B3 was obviously better than that of B1, which can be utilized to achieve a better orbit determination accuracy. Based on the establishment of the observation model and the orbit determination algorithm model, a hardware-in-loop simulation experimental platform was established after the quality of the receiver’s field observation data was evaluated. The simulation results show that, under the same conditions, the real-time orbit determination accuracy of the B3 frequency is better than that of B1, and comparable to that of GPS in full operation.
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Received: 28 January 2019
Published: 05 March 2020
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Corresponding Authors:
Xiao-jun JIN
E-mail: 21724023@zju.edu.cn;axemaster@zju.edu.cn
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基于北斗B3频点的低轨卫星实时定轨性能评估
基于自主研制的搭载于浙江大学皮星三号（ZDPS-3）任务的星载GPS/北斗双模接收机，在北斗B3频点上开展低轨卫星实时定轨仿真试验，对基于北斗（特别是B3频点）的实时定轨性能进行评估. 结果表明：B3频点的测距伪码码速率高，其抗噪声性能优于B1频点，有利于提升北斗导航系统下的低轨卫星定轨精度. 在建立观测模型和定轨算法模型并检验接收机实测数据质量的基础上，利用导航信号模拟器建立半物理仿真实验平台. 实验结果表明，在仅使用北斗二号14颗导航卫星的条件下，利用B3频点能获得明显优于B1频点的实时定轨精度，并且与基于处于完全运行状态的GPS的定轨精度相当.
关键词：
星载GNSS接收机,
北斗B3频点,
低轨卫星实时定轨,
半物理仿真,
皮纳卫星
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