The Accuracy Evaluation and Analysis of Airborne Gravimetry in Coastal Area

doi:10.11947/j.AGCS.2015.20130783

Abstract

Abstract: The two methods including Poisson integral and point masses are used to evaluate the accuracy of airborne gravimetry data in Australia West Arnhem Land. The results show that the accuracy of Australia airborne gravimetry data are respectively 2.81×10^-5 m/s² and 2.95×10^-5 m/s² according to the 2'resolution, and the accuracy of 5'resolution is better than 3×10^-5 m/s². The Bohai airborne gravimetry using CHAGS system is evaluated by using the crossover point adjustment and Poisson integral method, the analysis results show that the two estimation modes has different accuracy value. Based on the external land and sea gravity data, the Bohai airborne gravimetry has the accuracy better than 3.5×10^-5 m/s² according to the 5'resolution although the data has the 3×10^-5 m/s² systematic error. In the coastal area, the accuracy of airborne gravimetry is affected by the performance of surveying system, and the general accuracy of airborne gravimetry is about or better than 3×10^-5 m/s² according to the 5'resolution.

Key words: airborne gravimetry, Pisson integral, point masses model, accuracy evaluation

CLC Number:

P228.3

ZHAI Zhenhe, SUN Zhongmiao, LI Yingchun, XIAO Yun. The Accuracy Evaluation and Analysis of Airborne Gravimetry in Coastal Area[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(1): 1-5.

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