Ground elevation model generation method based on different orbit satellites

By using two different orbit satellites for cross-observation and geometric calculations, combined with the algorithm unit in the data processing calculation module, the problem of unstable stereogram satellite acquisition cycle is solved, and rapid generation of elevation models and high-precision data acquisition is achieved under extreme weather conditions.

CN119693576AInactive Publication Date: 2025-03-25CHINA HIGHWAY ENG CONSULTING GRP CO LTD +2
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Patent Information

Application Number
CN202411856831.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2025-03-25
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

When the existing elevation model acquires the elevation values ​​of multiple observation points in the observation area, due to the strict technical requirements of stereoscopic satellites for weather and satellite inclination, the acquisition cycle is unstable, affecting the progress of the project.

Method used

Two different orbit satellites Sa1 and Sa2 are used to replace the traditional single stereogram satellites, and two independent distance and angle information are obtained through cross observation, and the three-dimensional position and elevation values ​​of the observation point are determined in combination with geometric calculations, and the final elevation values ​​are calculated through three sets of algorithm units in the data processing calculation module.

Benefits of technology

In extreme weather conditions, the impact can be bypassed, the rapid generation of elevation models can be ensured, and the accuracy and reliability of elevation data can be improved. It is suitable for emergency disaster relief and emergency engineering projects.

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Abstract

The invention discloses a ground elevation model generation method based on different orbit satellites, and relates to the technical field of elevation models.Two different orbit satellites are selected to replace a single stereomapping satellite to obtain observation point data, and a plurality of observation points Pi on the ground are observed in a crossed mode from two different angles; the three-dimensional position of the point Pi is determined through geometric calculation, the three-dimensional position of the observation point Pi and the elevation value can be obtained in extreme weather, the extreme weather is prevented from influencing the generation time of the elevation model in the observation area or project, and the elevation model of the required area is rapidly generated in emergency relief or engineering projects with tight time; through mutual cooperation of the three groups of algorithm units, factors such as the observation angle of a satellite, the orbit inclination angle of the satellite, the echo intensity of radar and the atmospheric refractivity are comprehensively considered, the final elevation values Hf of a plurality of observation points Pi are calculated, the obtained elevation data are more accurate, and scientific and reliable data support is provided for subsequent elevation modeling.
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