Volume 41 Issue 2
Feb.  2022
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Xiaoguo Guan, Hongzhou Chai, Guorui Xiao, Zhenqiang Du, Wenlong Qi, Xueping Wang. Signal quality analysis and quality check of BDS3 Precise Point Positioning in the Arctic Ocean[J]. Acta Oceanologica Sinica, 2022, 41(2): 166-179. doi: 10.1007/s13131-021-1704-7
Citation: Xiaoguo Guan, Hongzhou Chai, Guorui Xiao, Zhenqiang Du, Wenlong Qi, Xueping Wang. Signal quality analysis and quality check of BDS3 Precise Point Positioning in the Arctic Ocean[J]. Acta Oceanologica Sinica, 2022, 41(2): 166-179. doi: 10.1007/s13131-021-1704-7

Signal quality analysis and quality check of BDS3 Precise Point Positioning in the Arctic Ocean

doi: 10.1007/s13131-021-1704-7
Funds:  The Science and Technology of Henan Province under contract No. 212102310029; the National Natural Science Founation Cultivation Project of Xuchang University under contract No. 2022GJPY007; the Educational Teaching Research and Practice Project of Xuchang University under contract No. XCU2021-YB-024.
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  • Corresponding author: E-mail: guanguo666@163.com
  • Received Date: 2019-06-25
  • Accepted Date: 2019-11-08
  • Available Online: 2021-12-24
  • Publish Date: 2022-02-01
  • This study analyzes the signal quality and the accuracy of BeiDou 3rd generation Satellite Navigation System (BDS3) Precise Point Positioning (PPP) in the Arctic Ocean. Assessment of signal quality of BDS3 includes signal to noise ratio (SNR), multipath (MP), dilution of precision (DOP), and code-minus-carrier combination (CC). The results show that, 5 to 13 satellites are visible at any time in the Arctic Ocean area as of September 2018, which are sufficient for positioning. In the mid-latitude oceanic region and in the Arctic Ocean, the SNR is 25–52 dB Hz and the MP ranges from −2 m to 2 m. As the latitude increases, the DOP values show large variation, which may be related to the distribution of BDS satellites. The CC values of signals B1I and BIC range from −5 m to 5 m in the mid-latitude sea area and the Arctic Ocean, which means the effect of pseudorange noise is small. Moreover, as to obtain the external precise reference value for GNSS positioning in the Arctic Ocean region is difficult, it is hard to evaluate the accuracy of positioning results. An improved isotropy-based protection level method based on Receiver Autonomous Integrity Monitoring is proposed in the paper, which adopts median filter to smooth the gross errors to assess the precision and reliability of PPP in the Arctic Ocean. At first, the improved algorithm is verified with the data from the International GNSS Service Station Tixi. Then the accuracy of BDS3 PPP in the Arctic Ocean is calculated based on the improved algorithm. Which shows that the kinematic accuracy of PPP can reach the decimeter level in both the horizontal and vertical directions, and it meets the precision requirements of maritime navigation.
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