| Space technology of understanding and transforming of nature developed rapidly in the 21st century, it has a significant impact on human life. Satellite sensor, as various types of spatial information, is one of the main platforms with its development and application of space has been the focus of concern.Ground Coverage of the satellite is one of its important properties, building a common and efficient method of calculating coverage and performing visualization of the coverage area in the field of satellite tasks'evaluation, direction and decision-making in campaign,and satellite control has significant application.This article presents a coverage calculation model applied in different field of view sensor. The characteristic of the model is its high universality, computing speed, high accuracy, and it can accurately describe the instantaneous satellite coverage area. The organizational form pyramid-based image data dispatch image data of its calculating covered region to two-dimensional visualization of the expression of the form.The main results are as follows:1. The study of instantaneous coverage area of satellite to the earth.Based on satellite orbit and posture information, study the calculation model of the instantaneous coverage of the regional of the satellite in order to determine longitude and latitude covering the border region.2. The data organization and management and scheduling of instantaneous coverage area of satellite. Study the organizational structure based on image data and the hierarchical principle of pyramid data model; establish the level of model detail (LOD); explore possible rapid indexing and image data display method and analyze the experiment.3. The images cutting of instantaneous coverage area of satellite.Explore the image display method of two-dimensional topography, in view of the special nature of the specific shape of the region covered by the graphics come out with a workable rotation and cut algorithm to obtain the actual coverage area. |
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