AEROSPACE CHINA

中国航天科技集团有限公司主管

中国航天系统科学与工程研究院主办

ISSN 1671-0940

CN 11-4673/V

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AEROSPACE CHINA ›› 2025, Vol. 26 ›› Issue (1): 40-47.doi: 10.3969/j.issn.1671-0940.2025.01.006

• 专刊:空间信息技术专刊:空间信息技术 • 上一篇    下一篇

The Influence of Antenna Phase Center Error on Precise Orbit Determination

  

  • 发布日期:2025-08-27

The Influence of Antenna Phase Center Error on Precise Orbit Determination

WANG Lu, CHANG Xinuo, ZHONG Zhaofeng   

  1. Institute of Telecommunication and Navigation Satellites, CAST, Beijing 100094
  • Published:2025-08-27

Abstract: Navigation satellites generally use satellite-ground and inter-satellite observation data for precise orbit determination. In orbit determination, the satellite position is often referenced to the satellite’s centroid, while the observational measurements are referenced to the satellite’s antenna phase center. The deviation between the satellite’s centroid and the antenna phase center forms the satellite antenna phase center error, which affects the precision of orbit determination. This paper takes a global navigation satellite system (GNSS) MEO satellite as an example and analyzes the actual situation of the satellite antenna phase center deviation and phase center variation based on the ground calibration data of the in-orbit satellite antenna phase center and the satellite’s in-orbit working status. The analysis shows that the antenna phase center variation caused by the satellite’s in-orbit operation is only at the centimeter level, which has a limited impact on orbit determination accuracy. The main source of precise orbit determination error is the satellite antenna phase center deviation, which can be corrected using ground calibration data.

Key words: navigation satellite, antenna phase center deviation, antenna phase center variation, precise orbit determination