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Method for calculation and regulation of integral time of star-loading TDICCD camera

A technology of integration time and adjustment method, which is applied in the direction of camera devices, etc., can solve the problems of TDICCD cameras that cannot obtain real-time integration time, image blur, and image quality degradation, so as to improve reliability and image quality, high real-time performance, and improve calculation The effect of precision

Active Publication Date: 2008-07-23
AEROSPACE DONGFANGHONG SATELLITE
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Problems solved by technology

This adjustment method will cause the TDICCD camera to fail to obtain real-time integration time when the function fails or the data is abnormal, resulting in blurred images and reduced image quality

Method used

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  • Method for calculation and regulation of integral time of star-loading TDICCD camera
  • Method for calculation and regulation of integral time of star-loading TDICCD camera
  • Method for calculation and regulation of integral time of star-loading TDICCD camera

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Embodiment Construction

[0056] The flow chart of TDICCD camera integration time calculation method is shown in Fig. 4, including four processes of high-precision orbit simulation, calculation of photographic point position vector data, radial velocity elimination, and solution of integration time.

[0057] (1) High-precision track simulation

[0058] First, vector simulation is performed using high-precision track simulation software, and the software used in this embodiment is STK. Input the number of satellite orbit elements in STK, build a remote sensor in the satellite, set the installation angle of the remote sensor to simulate TDICCD camera imaging, because the remote sensor itself can only provide the longitude, latitude, oblique distance data and remote sensing of the intersection point of the boresight and the earth The position vector data of the intersection curve (pattern intersection) between the sensor envelope and the earth, so a remote sensor with a field of view of 0 degrees is used ...

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Abstract

The invention relates to a space borne TDICCD camera integral timing and adjusting method, which comprises the following steps: (1) the orbit is simulated with high precision in which positions parameters of photographed spots of the satellite under drift angle control or at different swinging angles are outputted such as vector coordinates and oblique distances of the photographed spots as well as vector simulation data for the satellite position; (2) the vector simulation data for the satellite position are analyzed to come out with the shift speeds of the photographed spots; (3) eliminate the radial-directional speeds from the shift speeds of the photographed spots to become the image motion speeds; (4) utilize the image motion speeds and the oblique distances of the photographed spots to obtain the integral times. The invention also provides a design method for TDICCD related parameters as well as a real-time adjusting method for integral times on the satellite under control of ground commands. The space borne TDICCD camera integral timing and adjusting method realizes an organic combination of simulation modeling with high precision and positional vector differential method, which eliminates errors introduced into the deduction process in traditional geometric analysis and calculation and controls error delivery to improve calculation precision; the arrival real-time adjusting method for integral times on the satellite ensures a reliable integral synchronous control.

Description

technical field [0001] The invention relates to a method for calculating and adjusting the integral time of a spaceborne TDICCD camera, in particular to a method for calculating the integral time based on the differential algorithm of the photographic point position vector and a method for adjusting the integral time on the star for the automatic control of the ground command control auxiliary system. Background technique [0002] With the development of imaging technology, TDICCD devices have been widely used in aerospace remote sensors. TDI (Time Delay and Integration)-CCD means Time Delay Integral Charge Coupled Device in Chinese. It is a new type of photoelectric sensor developed in recent years. Features, using the TDICCD device as the focal plane detector of the remote sensor can reduce the relative aperture of the optical system, thereby reducing the weight and volume of the remote sensor. [0003] For spaceborne optical remote sensors using TDICCD devices, the imagi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/02
Inventor 陆春玲朱兴鸿赵志明李琳琳崔玉福
Owner AEROSPACE DONGFANGHONG SATELLITE
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