有限范围的重力层间改正算法

发布时间：2018-06-25 22:29

  本文选题：传统层间改正 + 有限范围层间改正　； 参考：《测绘学报》2017年01期

【摘要】：层间改正是重力归算的一项重要内容,传统的平面层层间改正、球面层层间改正与地形改正的范围不一致,因此均存在远区虚拟地形引入的近似误差,且计算点高度越高,此误差越大。本文提出使用有限范围的层间改正进行重力归算的方法,使其区域范围与地形改正的范围一致。然后给出了有限范围层间改正的简便计算方法,该算法与通过地形改正严密积分法演化来的算法具有较好的一致性。内插试验说明当计算点地形高于1000m时,内插应使用基于有限范围层间改正的重力归算方法。
[Abstract]:Interlayer correction is an important part of gravity reduction. The traditional interlayer correction is inconsistent with the range of topographic correction. Therefore, there is an approximate error caused by the virtual terrain in the far region, and the height of the calculated point is higher. The greater the error. In this paper, a method of gravity reduction by using a finite range of interlayer corrections is proposed, which makes the regional range consistent with the range of topographic correction. Then, a simple calculation method of interlayer correction in finite range is presented, which is in good agreement with the algorithm evolved by the strict integration method of terrain correction. The interpolation test shows that when the terrain of the calculated point is higher than 1000m, the gravity reduction method based on the correction between the finite range layers should be used in the interpolation.
【作者单位】： 信息工程大学地理空间信息学院;地理信息工程国家重点实验室;西安测绘研究所;信息工程大学导航与空天目标工程学院;长安大学地质工程与测绘学院;
【基金】：国家自然科学基金(41674025;41674082) 地理信息工程国家重点实验室开放研究基金(SKLGIE2016-M-1-5)~~
【分类号】：P223
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本文编号：2067778