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《Chinese Journal of Geophysics》 2013-01
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Systematic error compensation for airborne gravimetry

SUN Zhong-Miao1,2,ZHAI Zhen-He1,2,XIAO Yun1,2,LI Ying-Chun1,2 1 Xi′an Research Institute of Surveying and Mapping,Xi′an 710054,China 2 State Key Laboratory of Geo-information Engineering,Xi′an 710054,China  
Sources of systematic errors in airborne gravity measurements are analyzed in detail using the basic mathematical model.They can be classed into three types.One is the observation error in the apron gravity and the base reading of the airborne gravimeter,the second is the calibration error of cross-coupling correction,beam scale factor and the scale value,and the third is the modeling error for the horizontal acceleration correction.The magnitudes of the various systematic errors are discussed and the related compensation methods are proposed.It is indicated that the modeling error of the horizontal acceleration correction is one of the largest errors.Analysis of real data demonstrates that after compensating the various systematic errors especially the modeling error of the horizontal acceleration correction,the systematic bias between airborne gravity and the ground(or sea) reference value in the Datong and Harbin areas and Bohai Bay are all less than 1×10-5m·s-2.
【Fund】: 国家自然科学基金项目(41174017)资助
【CateGory Index】: P223
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