Performance evaluation of triple-frequency GPS/Galileo/BDS single-epoch medium baseline RTK positioning

Abstract

Single-epoch real-time kinematics (RTK) has drawn attention for its benefits in managing cycle slips, yet research is mostly confined to short baselines. In this contribution, the triple-frequency GPS/Galileo/BDS single-epoch medium baseline RTK model is presented. Based on nine medium baselines, the positioning performance of triple-frequency single-epoch RTK is demonstrated and compared with the corresponding results of traditional dual-frequency scheme. It is shown that the triple-frequency scheme has a correctly fixing rate of 97.6%, which is roughly 5.6% higher than that of the dual-frequency scheme. For all solutions, including fixed and float epochs, the triple-frequency scheme achieves positioning accuracy of approximately 2.2, 1.8, and 5.3 cm in the east, north, and up directions, respectively, which is half the accuracy of the dual-frequency scheme. These results suggest triple-frequency observations enhance single-epoch medium RTK ambiguity resolution, potentially achieving centimetre-level accuracy in sparse reference station environments like offshore and desert regions.

Keywords:

• Medium baseline RTK
• Single-epoch
• Ambiguity resolution
• Fixing rate
• Positioning accuracy

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Yingchun You

Yingchun You, Shenyang City, Liaoning Province, worked in the School of Transportation and Geomatics Engineering, Shenyang Jianzhu University as a lecturer and application of mainly engaged in the research of GNSS high-precision positioning algorithm.

Maohua liu

Maohua Liu, is a doctor and an associate professor, who mainly focuses on the application of surveying and mapping science and technology, Shenyang, 110168, China.

Yan Wang

Yan Wang, is a master and an associate professor, who mainly focuses on precise engineering surveys, Shenyang, 110168, China.