Ocean real-time precise point positioning with the BeiDou short-message service

Kaifei He, Duojie Weng, Shengyue Ji, Zhenjie Wang, Wu Chen, Yangwei Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


Real-time precise point positioning (RTPPP) is a popular positioning method that uses a real-time service (RTS) product to mitigate various Global Navigation Satellite Systems (GNSS) errors. However, communication links are not available in the ocean. The use of a communication satellite for data transmission is so expensive that normal users could not afford it. The BeiDou short-message service provides an efficient option for data transmission at sea, with an annual fee of approximately 160 USD. To perform RTPPP using BeiDou short messages, the following two challenges should be appropriately addressed: the maximum size of each BeiDou message is 78 bytes, and the communication frequency is limited to once a minute. We simplify the content of RTS data to minimize the required bandwidth. Moreover, the orbit and clock corrections are predicted based on minute-interval RTS orbital and clock corrections. An experiment was conducted to test the performance of the proposed method. The numerical results show that the three-dimensional positioning precision can reach approximately 0.4 m with combined GPS + GLONASS and approximately 0.2 m with combined GPS + GLONASS + Galileo + BeiDou.

Original languageEnglish
Article number4167
Pages (from-to)1-17
Number of pages17
JournalRemote Sensing
Issue number24
Publication statusPublished - 2 Dec 2020


  • BeiDou short-message service
  • Ocean
  • Real-time PPP
  • RTS

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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