发明名称 |
Satellite camera attitude determination and image navigation by means of earth edge and landmark measurement |
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.
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申请公布号 |
US6023291(A) |
申请公布日期 |
2000.02.08 |
申请号 |
US19970939616 |
申请日期 |
1997.09.29 |
申请人 |
SPACE SYSTEMS/LORAL, INC. |
发明人 |
KAMEL, AHMED A;ONG, KWOK M |
分类号 |
G01C21/24;G01C11/02;G01S3/786;H04N5/232;H04N7/00;H04N7/18;(IPC1-7):H04N7/18 |
主分类号 |
G01C21/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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