Analysis of PPP Performance Based on BDS Comprehensive Zone Corrections

ZHANG Yize; CHEN Junping; YANG Sainan; CHEN Qian

doi:10.13203/j.whugis20170044

Volume 44 Issue 2

Feb. 2019

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Geomatics and Information Science of Wuhan University > 2019 > 44(2): 159-165. > DOI: 10.13203/j.whugis20170044

ZHANG Yize, CHEN Junping, YANG Sainan, CHEN Qian. Analysis of PPP Performance Based on BDS Comprehensive Zone Corrections[J]. Geomatics and Information Science of Wuhan University, 2019, 44(2): 159-165. DOI: 10.13203/j.whugis20170044

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Analysis of PPP Performance Based on BDS Comprehensive Zone Corrections

ZHANG Yize^{1, 2, 3,},
CHEN Junping^{1, 2, 4, ,},
YANG Sainan¹,
CHEN Qian^{1, 2, 4}

1.
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
2.
Shanghai Key Laboratory of Space Navigation and Positioning Techniques, Shanghai 200030, China
3.
College of Surveying and Geo-informatics, Tongji University, Shanghai 200092, China
4.
Chinese University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

The National Natural Science Foundation of China 11403112

The National Natural Science Foundation of China 11673050

the Opening Project of Shanghai Key Laboratory of Space Navigation and Positioning Techniques KFKT_201706

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Author Bio:
ZHANG Yize, PhD, specializes in the GNSS precise positioning and GNSS augmentation.E-mail: zhyize@163.com
Corresponding author:
CHEN Junping, PhD, professor. E-mail:junping@shao.ac.cn
Received Date: December 04, 2017
Published Date: February 04, 2019

Graphical Abstract

Abstract

Abstract

Comprehensive zone correction is a new type of differential corrections for BeiDou wide area augmentation system. As broadcasted together with the equivalent satellite clock and orbit corrections by BDS satellites, they enable user decimeter-level real-time positioning capability using the carrier-phase observations. In this paper, we give a brief introduction of comprehensive zone corrections, and the function model of precise point positioning (PPP) for dual-and single-frequency users using the comprehensive zone corrections. Tracking data of 30 stations in mainland China are used to evaluate the PPP performance, including convergence time, positioning accuracy and its relation with the user's distance from the zone center. Results show that the dual-frequency PPP convergences to 0.5 m in 25 minutes and the positioning accuracy are 0.15 m in horizontal and 0.2 m in vertical, respectively. As for single frequency PPP, the positioning accuracy convergences to 0.8 m in 20 minutes, while the positioning accuracy is 0.3 m in horizontal and 0.5 m in vertical. We conclude that the BDS PPP accuracy using the broadcasted wide area differential corrections reaches decimeter level within the distance of 1 000 km around zone center, and the accuracy becomes slightly worse with the user's distance from the zone center increasing.
- BDS,
- comprehensive zone correction,
- equivalent satellite clock,
- orbit correction,
- convergence time,
- precise point positioning

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References

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