Abstract
Abstract. The high resolution satellite with the longer focal length and the larger aperture has been widely used in georeferencing of the observed scene in recent years. The consistent end to end model of high resolution remote sensing satellite geometric chain is presented, which consists of the scene, the three line array camera, the platform including attitude and position information, the time system and the processing algorithm. The integrated design of the camera and the star tracker is considered and the simulation method of the geolocation accuracy is put forward by introduce the new index of the angle between the camera and the star tracker. The model is validated by the geolocation accuracy simulation according to the test method of the ZY-3 satellite imagery rigorously. The simulation results show that the geolocation accuracy is within 25m, which is highly consistent with the test results. The geolocation accuracy can be improved about 7 m by the integrated design. The model combined with the simulation method is applicable to the geolocation accuracy estimate before the satellite launching.
Highlights
INTRODUCTIONThe high resolution optical remote sensing satellite has achieved a great progress
In recent years, the high resolution optical remote sensing satellite has achieved a great progress
The high resolution satellite with the camera of the longer focal length and the larger aperture has been widely used in obtaining the three dimensional coordinate information of the observed scene recently (Huang et al, 2007), which means the higher requirements of the on-orbit geometric stability of the whole imaging system
Summary
The high resolution optical remote sensing satellite has achieved a great progress. The level of the design, the manufacture and the application of the satellite has been improved continuously. The simulation of these processes is becoming more and more important (Poli et al, 2015). In this area, the imaging chain of the satellite system is in common use (Fiete et al, 1999), which contains two aspects of the radiation and the geometry generally. The high resolution satellite with the camera of the longer focal length and the larger aperture has been widely used in obtaining the three dimensional coordinate information of the observed scene recently (Huang et al, 2007), which means the higher requirements of the on-orbit geometric stability of the whole imaging system. To improve the geolocation accuracy, the on-orbit stability index assignment must be reasonable, which can be decided in the simulation based on the geometric chain
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