Correction of Camera Interior Orientation Elements Based on Multi-Frame Star Map

Abstract

Optical remote sensing satellite usually adopts the method of photographing calibration field to achieve calibration of internal and external orientation elements of optical camera. However, as time goes on, or as the latitude changes, the accuracy of satellite positioning after calibration will decline. The traditional calibration method requires satellite passes calibration field and is difficult to achieve globally, so it's hard to be realized that keeping the global positioning accuracy high. The purpose of this study is to explore a more feasibility calibration method of interior orientation elements in optical satellites. That is, by photographing stars, the stars are used as control points to calibrate the camera's internal orientation elements. In this study, a camera calibration method based on multi-frame star map was proposed. The star maps were captured by the star camera of Ziyuan-3 02 (ZY-3 02). Final result proved to be efficient to offer sufficient information for interior orientation elements calibration purpose.