Non-ergodic approximation method for intersections of airborne gravity survey network

doi:10.11947/j.AGCS.2022.20210037

Abstract

Abstract: The gravity difference at the intersections of the airborne gravity survey network is an important basis for objectively evaluating the measurement quality of the survey lines, and it is alsoan important way to adjust the level difference of the gravity field between the survey lines. With the enlargement and irregularity of the survey network, it is very important to search the intersections accurately and quickly. Existing methods all traverse one by one after narrowing the range of intersections, which cannot guarantee that all intersections can be searched quickly and accurately. The non-ergodic approximation method proposed in this paper is to perform iterative approximation through a combination of fast approximation and fine-tuning approximation, avoiding one-by-one traversal and directly approaching the intersections quickly. Experimental results show that this method is not only suitable for continuous and uniform conventional networks, but also suitable for irregular and unconventional networks. The search speed is 3~4 orders of magnitude higher than the existing methods, and it is also far superior than the famous Canadian commercial geophysical software of Oasis Montaj.

Key words: intersections, fast approximation, airborne gravity, survey network, non-ergodic

CLC Number:

P223

QU Jinhong, JIANG Zuoxi, ZHOU Xihua, LUO Feng, LI Fang. Non-ergodic approximation method for intersections of airborne gravity survey network[J]. Acta Geodaetica et Cartographica Sinica, 2022, 51(1): 71-79.

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