发明授权
- 专利标题: Satellite camera attitude determination and image navigation by means of earth edge and landmark measurement
- 专利标题(中): 卫星摄像机姿态确定和图像导航通过地球边界和地标测量
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申请号: US939616申请日: 1997-09-29
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公开(公告)号: US6023291A公开(公告)日: 2000-02-08
- 发明人: Ahmed A Kamel , Kwok M Ong
- 申请人: Ahmed A Kamel , Kwok M Ong
- 申请人地址: CA Palo Alto
- 专利权人: Space Systems/Loral, Inc.
- 当前专利权人: Space Systems/Loral, Inc.
- 当前专利权人地址: CA Palo Alto
- 主分类号: G01C21/24
- IPC分类号: G01C21/24 ; G01C11/02 ; G01S3/786 ; H04N5/232 ; H04N7/00 ; H04N7/18
摘要:
A method and system is disclosed for imaging a celestial object, typically the Earth, with a spacecraft orbiting the celestial object. The method includes steps of (a) operating an imager instrument aboard the spacecraft to generate data representing an image of the celestial object; (b) processing the image data to derive the location of at least one predetermined landmark in the image and a location of edges of the celestial object in the image; and (c) further processing the detected locations to obtain the attitude of the imager instrument. The method includes a further step of outputting the image and the imager instrument attitude to at least one end-user of the image, and/or using the imager instrument attitude to revise the image before outputting the image to the at least one end-user of the image. The generated data preferably represents a one half frame image, and the steps of processing and further processing thus occur at a one half frame rate. The step of processing includes a step of applying the a priori knowledge of the attitude coefficients in processing new observations to determine the imager current attitude.
公开/授权文献
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