Establishment of High Precision DEM in Antarctic Dome A Area with Taking the Waveform Retracking,Slope Correction and the Data Fusion into Account

doi:10.11947/j.AGCS.2017.20160486

Abstract

Abstract: This paper introduces three kinds of waveform retracking algorithm: OCOG, CFI and LIRT in the CryoSat-2 LRM mode. The accuracy of satellite data is evaluated by comparing the results of three waveform retracking algorithm, based on the measured GPS data in the Dome A area of Antarctica. The results show that the accuracy of the optimal OCOG waveform retracking algorithm is the best, the average difference between the results and GPS is about -0.07 m, the standard deviation is about 0.60 m, which is obviously better than the other two algorithms. By comparing the relationship between the slope and the precision of the satellite data, we find the influence of slope factors on the precision of the satellite altimetry data can't be ignored, the verification results show that the slope correction can improve the accuracy of satellite altimetry by about 38% in the Dome A area. Finally we establish the Antarctic Dome A region DEM by combining the GPS and CryoSat-2 data, which resolution is 300 m.the accuracy of fused DEM is about 0.24 m.

Key words: CryoSat-2, Dome-A, GPS, waveform retracking, slope correction, DEM

CLC Number:

P228.3

LI Fei, SONG Guoyun, YANG Yuande, HAO Weifeng, YANG Quanming. Establishment of High Precision DEM in Antarctic Dome A Area with Taking the Waveform Retracking,Slope Correction and the Data Fusion into Account[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(4): 403-410.

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