A Modified GNSS/VRS Algorithm Related Only to the Master Reference Station

doi:10.13474/j.cnki.11-2246.2018.0357

Abstract

Abstract: In kinematic network RTK (NRTK) positioning, when users move rapidly, the virtual reference station (VRS) also need to be changed frequently. This will lead to the frequent initialization and damage the continuity of RTK positioning. In this paper, we proposed a modified algorithm which can overcome this shortcoming. Firstly, a fixed VRS was selected in the network cell where the user was located. Then, the virtual observations was generated at this virtual station. Lastly, the differential atmospheric delay between user's actual position and this virtual station was corrected. The performance was tested with Tianjin CORS. The results showed that the positioning accuracy and initialization time using the proposed algorithm was comparable to the traditional VRS algorithm. However, the proposed algorithm had two obviously advantages. The first one was that users do not need to reinitialize as long as the main reference station was not changed. The second one was that only the software in NRTK center needed to be upgrade, instead of any improvement in the RTK terminals.

Key words: fixed VRS, network RTK, reinitialization

CLC Number:

P228

WANG Yanheng, PAN Shuguo, NI Xin, YU Guorong, GAO Wang. A Modified GNSS/VRS Algorithm Related Only to the Master Reference Station[J]. 测绘通报, 2018, 0(11): 90-92,98.

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