A lunar surface safe landing area selection method and system

Abstract

The invention discloses a lunar surface safe landing area selection method and system, and the method comprises the steps: carrying out the recognition of the positive and negative microtopographies of the lunar surface through employing a dual-threshold image segmentation method for the high-resolution remote sensing image data in a grid format; Calculating the percentage of a flat area of each grid in the pre-selected landing area, and generating a percentage grid image of the flat area of the pre-selected landing area; Counting the average percentage value of the flat area of the landing area of the lunar landing task to serve as an evaluation threshold value of the lunar landing area safety; And comparing the calculated percentage of the flat area of each grid in the pre-selected landing area with an evaluation threshold value, and generating a grid image of the safety evaluation result of the pre-selected landing area when the percentage is smaller than the evaluation threshold value, namely the unsafe grid and larger than or equal to the evaluation threshold value, namely the safety grid. A landing area is divided into safe and unsafe grids, and accurate selection of the safelanding area is achieved.

Description

technical field [0001] The present disclosure relates to the technical field of planetary remote sensing digital image processing and planetary surface digital terrain analysis, in particular to a method and system for selecting a safe landing area on the lunar surface. Background technique [0002] As the natural satellite of the earth, the moon is the first choice for human deep space exploration. The exploration and research of the moon is of great strategic significance to my country's technological, economic and social development. [0003] From the 1960s to the present, countries such as the United States and the former Soviet Union have successively launched multiple series of lunar landing probes. Limited by engineering technology and scientific level, early lunar landing probes (such as Luna and Surveyor series) did not have the ability to identify obstacles and select a safe landing area, so their landing success rate was very low. In the later stage of the Apollo...

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Problems solved by technology

However, the accuracy of DEM data on the lunar surface is low (ten-meter level), and there are a large number of meter-level or even decimeter-level negative terrain (craters, grooves) and positive terrain (ridges, steep slopes, and rocks) on the surface of the lunar landing area. etc.) objects, which are potential threats to lander landing and rover path planning

The low resolution of DEM data makes it difficult to conduct a comprehensive and detailed study of the morphology and meter-level threats of the pre-selected landing area

[0006] (2) In the prior art, there is no systematic and accurate description of the safety evaluation threshold of the lunar surface terrain factors, and it is difficult to comprehensively evaluate and select the safety of the lunar surface landing area quantitatively

Taking the slope as an example, there is no evaluation method for describing the safety slope threshold of the landing area, nor is it verified that the slope is within the threshold area and is suitable for landing

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