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Space Debris Observation Method Based on Alternate Exposure Time of CCD Camera

A space debris and exposure time technology, which is used in measurement devices, computer parts, and material analysis by optical means, etc., can solve the failure of low-orbit space debris detection, the decline of astronomical positioning accuracy, and the elongation of low-orbit space debris stars. question

Active Publication Date: 2021-03-16
ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) The short exposure of the CCD camera is beneficial to the detection of space debris in low orbits and ensures the accuracy of astronomical positioning, but it causes the detection of space debris in dim and high orbits to fail
[0008] (2) The long exposure of the CCD camera in the tracking mode is conducive to the detection of space debris from low, medium and high orbits, but it will lead to a decrease in the astronomical positioning accuracy of space debris in low, medium and high orbits or failure of astronomical positioning
[0009] (3) The long exposure of the CCD camera in the constant motion search mode is conducive to the detection of space debris in the dark, middle and high orbits and ensures the accuracy of astronomical positioning. However, due to the serious elongation of the star image of the space debris in low orbits, the detection of space debris in low orbits fails.

Method used

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  • Space Debris Observation Method Based on Alternate Exposure Time of CCD Camera
  • Space Debris Observation Method Based on Alternate Exposure Time of CCD Camera

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Experimental program
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specific Embodiment 1

[0061] For the convenience of description, the observation method mentioned in the present invention will be described below by taking the long and short light exposure durations as examples.

[0062] combine figure 1 , the present invention refers to a space debris observation method based on the alternation of different exposure times of a CCD camera, the observation method comprising the following steps:

[0063] S1: Use the CCD camera to alternately collect (2n+1) frames of images including space debris and background stars in the designated area according to the preset first exposure time and second exposure time, where the first exposure time is used to collect odd-numbered frames of images, using The second exposure duration collects images of even frames, and the first exposure duration is shorter than the second exposure duration; the n is a positive integer greater than or equal to 3.

[0064] S2: Estimate the image background.

[0065] S3: According to the estimat...

specific Embodiment 2

[0120] When the CCD camera adopts long and short exposure alternate exposure, the first frame image can be discarded, so that the new first frame image is still a short exposure image, and the space debris observation method based on the alternate exposure time of the CCD camera as mentioned above is used to detect The acquired images are processed. Except for the discarded first frame of images, it is better to acquire more than 7 other images.

specific Embodiment 3

[0122] Under the premise of high camera frame rate, short-medium-long alternating or long-medium-short alternating exposure can also be used. At this time, there are three image frame groups with different exposure times, and the three groups of image frames have different effects on space debris in different orbits. Observation efficiency, using the aforementioned space debris observation method based on alternating exposure time of the CCD camera to observe the three sets of image frames acquired, in order to obtain more accurate observation results.

[0123] In other examples, it can be further extended to obtain multiple image frame groups by setting more than three exposure durations, and analyze them one by one to obtain more accurate observation results.

[0124] Aspects of the invention are described in this disclosure with reference to the accompanying drawings, which show a number of illustrated embodiments. Embodiments of the present disclosure are not necessarily d...

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Abstract

The invention discloses a space debris observation method based on the alternation of different exposure times of a CCD camera. By controlling the CCD camera according to a given exposure time, the alternate collection of short-exposure and long-exposure images is continuously performed; by processing odd-numbered frames of short-exposure images, Realize the detection and astronomical positioning of space debris in low, medium and high orbits; realize the detection of space debris in medium and high orbits by processing even-numbered long-exposure images, and at the same time use the film model coefficients of adjacent odd-numbered frame images to realize the astronomical positioning of medium and high orbit debris detected in the current frame Positioning; and in the search observation mode, through the method of multipoint adjustment and the film model coefficients of adjacent odd frames, the precise astronomical positioning of space debris in low, middle and high orbits is realized. The present invention can realize the simultaneous detection and accurate positioning of space debris in all orbits. Astronomical positioning improves the observation efficiency of observation equipment and ensures the measurement accuracy of observation equipment for space debris in all orbits.

Description

technical field [0001] The invention relates to the technical field of space debris observation, in particular to a space debris observation method based on the alternation of different exposure times of a CCD camera. Background technique [0002] In many fields such as scientific research and military affairs, it is necessary to monitor space debris, give the position and changes of space debris in the sky at every moment, determine the orbit of space debris, and obtain accurate information about space debris. [0003] No matter in the tracking mode or the search mode, the traditional observation method is that the CCD camera basically collects images according to a fixed exposure time within a certain period of time. [0004] In the tracking mode, in order to improve the detection success rate of space debris in dim low-medium-high orbits, the only way to increase the exposure time is to cause the background stars to be too long, making it impossible to achieve astronomica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06T7/70G01N21/84
CPCG06T7/70G01N21/84G06V20/13H04N23/73G06T2207/10032G06T2207/10144G06T2207/10016G06T7/194G06T7/11G06V10/28G06V10/10
Inventor 张晓祥高昕李希宇
Owner ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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