|A research team led by Pro. LU Xiaochun from the National Time Service Center of Chinese Academy of Sciences, studied the origin of BDS pseudorange biases for the first time, and proposed several effective methods for mitigating the biases. The result was published in Satellite Navigation in January of 2020 with the title of “Initial Analysis for Characterizing and Mitigating the Pseudorange Biases of BeiDou Navigation Satellite System”.
It is known that pseudorange bias has become a practical obstacle in the field of high-precision global navigation satellite system (GNSS) applications, which greatly restricts the further development of high-precision applications. Unfortunately, no studies have been conducted on the pseudorange biases of the Beidou navigation satellite system (BDS).
Owing to the limitations regarding the parameter re-settings for hardware receivers, software receiver technology was used to achieve the ergodicity of the receiver parameters. Based on the high-fidelity signal observations collected by a 40-m high gain dish antenna at Haoping Observatory, the pseudorange biases of the BDS B1I and B3I signals and their dependency on different correlator spacings and front-end bandwidths were adequately provided in this studies. Finally, to mitigate the effects of pseudorange biases on the BDS performance to the greatest extent possible, three kinds of effective mitigation methods were proposes for the first time.
This study could contribute to special attention to GNSS pseudorange biases, and will be a significant promotion to a clear definition of the appropriate receiver parameter settings in the interface control documents (ICDs) for BDS and other individual satellite system.
The journal of Satellite Navigation, sponsored by the Aerospace Information Research Institute of Chinese Academy of Science, is a brand new and the first international peer-reviewed journal of China in the field of satellite navigation. This paper is one of the overall five important articles firstly published in the journal.