Method for measuring pointing error of astronomical telescope in real time
An astronomical telescope, pointing error technology, applied in the direction of testing optical performance, etc., can solve problems such as inconvenience for observers, and achieve the effect of good actual processing effect and the effect of pointing correction.
Inactive Publication Date: 2014-08-06
ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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Otherwise, it will cause great inconvenience to the observer
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Embodiment 1
[0029] Embodiment 1, the method for measuring astronomical telescope pointing error in real time, with reference to figure 1 : ⑴. The computer system controlling the astronomical telescope generates a matching library of the theoretical star map according to the direction of the astronomical telescope, the observation time, the relevant information of the telescope, and the constraints of the theoretical star map, for use when the theoretical system and the measured star map are matched. ⑵. Based on the background, dark field, flat field images of the CCD image, and the input CCD image, a comprehensive analysis is carried out to establish a mathematical model for the background estimation of the input CCD image, which is used for the background estimation of the input CCD image. ⑶. According to the estimated result of the background of the input CCD image, according to the given image segmentation threshold, scan the whole frame of the CCD image, give the scanning result of all...
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The invention provides a method for measuring a pointing error of an astronomical telescope in real time. The method comprises the following steps: (1) generating a theoretical star atlas; (2) carrying out image background estimation; (3) carrying out full frame scanning of an image; (4) coupling the theoretical star atlas and an actual measurement star atlas; (5) calculating the pointing error of the astronomical telescope; (6) according to a calculation result of the step (5), correcting an angle measurement value of a space fragment, and raising angle measurement precision of the space fragment. In the invention, according to an acquired CCD image and a time and a direction which are corresponding to the image, the pointing error of the astronomical telescope is calculated in real time, and pointing precision of a corrected telescope is at least better than half of a CCD image pixel resolution. An actual processing effect of the method is good, the method can be widely applied to the scientific research and engineering fields, and pointing correction of a mobile observation device is facilitated especially.
Description
technical field [0001] The invention is a method for measuring the pointing error of an astronomical telescope in real time. It can detect the star image on the image according to the given CCD image of the astronomical telescope and the time and pointing corresponding to the collected image, so as to measure the pointing of the astronomical telescope in real time. error method. Background technique [0002] Surveillance of space debris is required in many fields, including scientific research. Astronomical telescopes are one of the means of observing space debris. Since there are a series of errors in the process of manufacturing, adjusting and installing astronomical telescopes, pointing error corrections must be made before use, so as to give more accurate angle measurements of space debris at the time of observation. Through a series of angle measurement values of space debris, the spatial position and change of space debris can be obtained, and the orbit of space de...
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IPC IPC(8): G01M11/02
Inventor 张晓祥高昕
Owner ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI