Assessment method of agile imaging simulation and positioning accuracy of satellite

Abstract

The invention provides an assessment method of agile imaging simulation and positioning accuracy of a satellite. The assessment method comprises following steps: designing a load physical parameter index according to an application demand; adopting a numerical integration method to simulate the movement trajectory of the satellite in the ideal state and correcting perturbing factors according to a platform design index; calculating an attitude maneuver angle for agile imaging in the mode of constant angular velocity or constant linear velocity and performing correction of a drift angle; generating the ideal agile imaging sequence of images by simulation and corresponding coordinate files for uniform ground grid points based on the movement trajectory of the satellite, attitude data of exposure time, design parameters of a camera, DOM data and DEM data in a corresponding data range; and obtaining an imaging simulation result of synthetic movement of the satellite according to the platform design index and movement error terms so that influence of synthetic movement of the satellite upon geometric positioning accuracy is further assessed. The assessment method of agile imaging simulation and positioning accuracy of the satellite has following beneficial effects: by adoption of the method, a real motion state and an imaging process of the satellite on orbit can be simulated; and geometric positioning accuracy for agile imaging of synthetic movement of the satellite is assessed.

Description

technical field [0001] The invention relates to the technical field of image processing of remote sensing satellites, in particular to a satellite agile imaging simulation and positioning accuracy evaluation method, in particular to an agile imaging simulation and positioning accuracy evaluation method considering satellite comprehensive motion. Background technique [0002] In recent years, relevant research institutions at home and abroad have successively carried out a large number of research and development work on agile imaging remote sensing satellites, especially low-orbit video small satellites, which have become the most potentially commercially valuable remote sensing observation means in the fields of target tracking and dynamic monitoring. The agile satellite realizes rapid imaging of the target area through attitude maneuvering, acquires sequence images and composite videos of the target area in a short time, and can provide rich surface information and dynamic ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to design a set of simulation system for automatically calculating attitude maneuvers and simulating sequence image generation under the conditions of comprehensive movement of agile satellites according to the satellite platform design parameters and application requirements in the system design stage for the agile imaging mode of remote sensing satellites , and quantitatively evaluate the decrease in geometric positioning accuracy due to satellite motion, so as to guide the satellite and payload designers to propose rationalized index design for satellite platforms and payloads that meet the application requirements

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