Moon control network establishment method

Abstract

The invention discloses a moon control network establishment method, comprising the steps of: step 1, obtaining image data of the lunar surface and corresponding ephemeris data and attitude data; step 2, extracting corresponding image points from image data from different viewing angles of a same orbit and image data of adjacent orbits by using an automatic image matching technology; step 3, by employing the data and the corresponding image points, performing adjustment processing for a survey area to form the ground stereo model of the whole survey area; step 4, performing adjustment processing for the whole moon after the adjustment processing is performed for survey areas; step 5, laying control points on the whole moon according to an established regular grid, then, calculating the selenographic coordinates of the control points according to parameters of the adjustment of the survey areas and the adjustment of the whole moon. The establishment method for the moon control network focuses on specific requirements for 1: 2,500,000 or larger scale lunar mapping, solving the problems of scale change and absolute orientation of the control network and improving the absolute accuracy of the control network.

Description

technical field [0001] The invention mainly relates to the field of image processing, in particular to a method for constructing a lunar surface control network. Background technique [0002] The lunar land control network includes a horizontal control network and an elevation control network. On Earth, the geodetic control network is mainly constructed through ground geodesy. The horizontal control network is established by triangulation and traverse survey, combined with astronomical survey, gravity survey and elevation survey, and calculated on the reference ellipsoid to calculate the geodetic coordinates of various locations as the basic control of the plane position. The elevation control network is established with leveling survey, combined with astronomical survey and gravity survey, the elevation of each benchmark point is calculated as the basic control of elevation. [0003] The lunar surface control network is mainly established through ground-based observation ...

AI Technical Summary

Problems solved by technology

[0004] The existing lunar control networks mainly include the Apollo lunar surface control network, ULCN1994, CLCN1997, and ULCN2005, etc., but these control networks have many defects, mainly in the uneven distribution of control points, mainly concentrated on the front of the moon; The plane position and elevation accuracy of the control points are low and inconsistent; the control network does not provide supporting reference images, and cannot be accurately positioned on the satellite image data, which limits the application of these control networks

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