航空重力测网交叉点的非遍历逼近方法

doi:10.11947/j.AGCS.2022.20210037

摘要/Abstract

摘要： 航空重力测网交叉点上的重力差值是客观评价测线测量质量的重要依据，也是调整测线之间重力场水平差异的重要途径。随着测网大型化和不规则化，测网交叉点精准、快速搜索变得至关重要。现有方法均采用缩小交叉点范围后进行逐一遍历，无法保证快速、准确搜索到所有的交叉点。本文提出的非遍历逼近方法，是通过快速逼近和微调逼近的组合进行迭代式逼近，避开逐一遍历直接快速逼近交叉点。试验表明，该方法搜索不仅适用于测点连续、均匀的常规测网，也适用于不规则、非常规测网，搜索速度较现有方法提升3～4个数量级，也远优于加拿大著名商业地球物理软件Oasis Montaj。

关键词: 交叉点, 快速逼近, 航空重力, 测网, 非遍历

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

中图分类号:

P223

屈进红, 姜作喜, 周锡华, 罗锋, 李芳. 航空重力测网交叉点的非遍历逼近方法[J]. 测绘学报, 2022, 51(1): 71-79.

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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