Comparison of Beidou autonomous navigation performance using the SRP model and onboard accelerometers

Jing Qiao, Guochang Xu, Wanke Liu, Peng Fang, Wu Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review


The Autonomous Navigation (AutoNav) mode of a Global Navigation Satellite System (GNSS) utilizes Inter-Satellite Links (ISLs) to maintain satellite operations without the service from the ground control segment. The newly launched Beidou satellites are capable of conducting ISLs for orbit determination to improve their autonomy, integrity, reliability, and robustness. However, the satellite orbit errors can increase over time due to various force model errors, particularly that of Solar Radiation Pressure (SRP). Accelerometers aboard satellites can measure non-conservative forces directly and have been successfully used in satellite missions for gravity recovery and atmosphere study (i.e., GRACE, CHAMP, and GOCE). This study investigates the feasibility to use accelerometers aboard Beidou satellites to improve AutoNav accuracy and service span. The results show that in a simulated 180-day AutoNav period, the orbit accuracy with the aid of accelerometers is two times better than that of using ISL data only.

Original languageEnglish
Pages (from-to)183-194
Number of pages12
JournalActa Astronautica
Publication statusPublished - Aug 2020


  • Accelerometer
  • Autonomous navigation
  • Beidou navigation satellite system
  • Solar radiation pressure

ASJC Scopus subject areas

  • Aerospace Engineering


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