关键词: GAMIT/GLOBK, 冻土, IGS, 时间序列, 噪声

Abstract:

The GPS station of the Arctic Yellow River scientific research station is located in Svalbard, Norway, and plays an important role in the surveying and mapping of the Arctic research of China. Further research is needed on its stability because the station is built on permafrost limited to polar conditions. In this paper, observations from the Arctic Yellow River GPS satellite observation station, combined with observations from surrounding 14 IGS (International GNSS Service) stations for the same time period, were processed using GAMIT/GLOBK high-precision GPS data processing software. The noise level, the parameters of the time series, and its uncertainty were estimated based on different noise models, and the relationship of the movement trend between the Yellow River GPS station and the IGS stations was analyzed. The results show that the Yellow River Station and the surrounding GPS stations’ time series has white noise and a larger magnitude of flicker noise. Some components of certain stations also have random walk noise. Furthermore, the total noise and parameter uncertainty were underestimated when only white noise was considered. The horizontal and vertical motion trends of the the Yellow River GPS station are consistent with the NYAL station. Only the vertical direction has a difference of 2.15 mm·a^–1.

Key words: GAMIT/GLOBK, permafrost, IGS, time series, noise