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星基增强系统实验卫星性能评估

Performance Evaluation of CentiSpace Navigation Augmentation Experiment Satellites.

机构信息

The 29th Research Institute of China Electronic Technology Group Corporation, Chengdu 610036, China.

Beijing Future Navigation Tech Co., Ltd., Beijing 100081, China.

出版信息

Sensors (Basel). 2023 Jun 19;23(12):5704. doi: 10.3390/s23125704.

DOI:10.3390/s23125704
PMID:37420869
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10301026/
Abstract

This paper presents the performance analysis of CentiSpace low earth orbit (LEO) experiment satellites. Distinguishing them from other LEO navigation augmentation systems, the co-time and co-frequency (CCST) self-interference suppression technique is employed in CentiSpace to mitigate significant self-interference caused by augmentation signals. Consequently, CentiSpace exhibits the capability of receiving navigation signals from the Global Navigation Satellite System (GNSS) while simultaneously broadcasting augmentation signals within the same frequency bands, thus ensuring excellent compatibility for GNSS receivers. CentiSpace is a pioneering LEO navigation system to successfully complete in-orbit verification of this technique. Leveraging the on-board experiment data, this study analyzes the performance of space-borne GNSS receivers equipped with self-interference suppression and evaluates the quality of navigation augmentation signals. The results show that CentiSpace space-borne GNSS receivers are capable of covering more than 90% visible GNSS satellites and the precision of self-orbit determination is at the centimeter level. Furthermore, the quality of augmentation signals meets the requirements outlined in the BDS interface control documents. These findings underscore the potential of the CentiSpace LEO augmentation system for the establishment of global integrity monitoring and GNSS signal augmentation. Moreover, these results contribute to subsequent research on LEO augmentation techniques.

摘要

本文对 CentiSpace 低地球轨道（LEO）实验卫星的性能进行了分析。与其他 LEO 导航增强系统不同，CentiSpace 采用共时同频（CCST）自干扰抑制技术来减轻增强信号引起的显著自干扰。因此，CentiSpace 具备在同一频段内接收来自全球导航卫星系统（GNSS）导航信号的同时广播增强信号的能力，从而确保了对 GNSS 接收机的良好兼容性。CentiSpace 是首个成功完成该技术在轨验证的 LEO 导航系统。本研究利用星载实验数据，分析了配备自干扰抑制功能的星载 GNSS 接收机的性能，并评估了导航增强信号的质量。结果表明，CentiSpace 星载 GNSS 接收机能够覆盖超过 90%可见的 GNSS 卫星，其轨道自主确定精度达到厘米级。此外，增强信号的质量符合 BDS 接口控制文件中规定的要求。这些发现突显了 CentiSpace LEO 增强系统在建立全球完整性监测和 GNSS 信号增强方面的潜力。此外，这些结果为后续的 LEO 增强技术研究提供了参考。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bb56/10301026/dd394e77d32e/sensors-23-05704-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bb56/10301026/dd394e77d32e/sensors-23-05704-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bb56/10301026/b215cc1bb89c/sensors-23-05704-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bb56/10301026/336be86016b5/sensors-23-05704-g002.jpg
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