CN102494872B - Method for measuring pointing error of astronomical telescope in real time - Google Patents
Method for measuring pointing error of astronomical telescope in real time Download PDFInfo
- Publication number
- CN102494872B CN102494872B CN201110361031.6A CN201110361031A CN102494872B CN 102494872 B CN102494872 B CN 102494872B CN 201110361031 A CN201110361031 A CN 201110361031A CN 102494872 B CN102494872 B CN 102494872B
- Authority
- CN
- China
- Prior art keywords
- pointing
- astronomical telescope
- error
- image
- star chart
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Image Processing (AREA)
- Telescopes (AREA)
Abstract
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
The present invention is a kind of method of measuring pointing error of astronomical telescope in real time, it can be according to given astronomical telescope ccd image, and gather corresponding moment of image and sensing, and the astrology on image are detected, thus the method for the error in pointing of the real time measure astronomical telescope.
Background technology
In many fields such as scientific researches, all need space junk to monitor.Astronomical telescope is one of means of space junk observation.Due to astronomical telescope manufacture, debug and the process such as installation in there is a series of error, so must carry out error in pointing correction before using, so just can provide space junk angle measurement value comparatively accurately in the time of the observation moment.By a series of angle measurement value of space junk, obtain locus and the variation thereof of space junk, determine the orbit of space junk, thereby obtain the accurate information of space junk.
In order to improve the angle measurement accuracy of astronomical telescope to space junk, common means are to analyze on the basis of astronomical telescope error source, provide astronomical telescope VEC, by observing tens fixed stars, according to the theoretical value of fixed star and measured value, calculate the coefficient of astronomical telescope VEC, thereby the error in pointing of astronomical telescope is revised.This method has certain requirement to telescopical sensing: too large (being less than 2 jiaos points) of the error in pointing before correction.Otherwise bring very large inconvenience to observer.
Summary of the invention
For the space junk measuring system that uses CCD, the invention provides a kind of method of the real time measure pointing of the telescope error, it can be according to the ccd image gathering, and corresponding moment and the sensing of image, calculate in real time telescopical error in pointing, revised pointing of the telescope precision is better than the half of ccd image pixel resolution.
The technical scheme that completes foregoing invention task is: a kind of method of measuring pointing error of astronomical telescope in real time, comprises following job step:
(1). theoretical star map generalization;
(2). image background is estimated;
(3). the full frame scanning of image;
(4). the coupling of theoretical star chart and actual measurement star chart;
(5). the calculating of astronomical telescope error in pointing;
(6). according to step result of calculation (5), revise the angle measurement value of space junk, improve the angle measurement accuracy of space junk.
Method of the present invention is in the computer system of control astronomical telescope, the image of input single frames CCD, adopts above-mentioned five steps successively, has finally obtained telescopical error in pointing amount, thereby revise the angle measurement value of space junk, improve the angle measurement accuracy of space junk.
" controlling the computer system of astronomical telescope " involved in the present invention can adopt the computer system of control astronomical telescope of the prior art.
More optimize with more specifically the above each step of description is as follows:
(1). theoretical star map generalization:
Control the computer system of astronomical telescope according to the constraint condition of the sensing of astronomical telescope, observation moment, telescopical relevant information, theoretical star chart, the coupling storehouse of generative theory star chart, during for theoretical system and actual measurement star pattern matching.
(2). image background is estimated:
According to the background of ccd image, details in a play not acted out on stage, but told through dialogues, flat field image, and the ccd image of input comprehensively analyzes, and sets up the mathematical model of input ccd image background estimating, for the background estimating of input ccd image.
(3). the full frame scanning of image:
According to the estimated result of input ccd image background, according to given image segmentation threshold, ccd image is carried out to full frame scanning, provide the scanning result of upper all astrology of ccd image, set up the coupling storehouse of actual measurement star chart according to this scanning result.
(4). the coupling of theoretical star chart and actual measurement star chart:
According to given coupling thresholding, characteristic matching is carried out in theoretical star chart storehouse and actual measurement star chart, the fixed star that the match is successful is used for calculating the correction of astronomical telescope error in pointing.
(5). the calculating of astronomical telescope error in pointing:
According to the result of the coupling of theoretical star chart and actual measurement star chart, according to given error correction formula, calculate the coefficient of pointing of the telescope error correction formula, thereby obtain the correction of pointing of the telescope error.
(6). in the time requiring the Angle Measured Data of output region fragment, the result of calculation of the astronomical telescope error in pointing (5) obtaining according to step, revises the Angle Measured Data of space junk, thereby obtains the high-precision Angle Measured Data of space junk.
Control the computer system of astronomical telescope according to above-mentioned input data, provided in real time the correction of telescope error in pointing.The tracker that result of calculation can offer measuring system is used, can ensure under the less prerequisite of space junk forecast precision error, space junk appears at observation field of view center region, result of calculation also can show by display system, and be stored in the storage medium of computer system.
The invention provides a kind of method of the real time measure pointing of the telescope error, he can be according to the ccd image gathering, and corresponding moment and the sensing of image, calculating in real time telescopical error in pointing, revised pointing of the telescope precision is at least better than the half of ccd image pixel resolution.The actual processing effect of the method is good, can be widely applied in scientific research and engineering field, is especially beneficial to the sensing correction of portable scope.
Brief description of the drawings
Fig. 1 is the schematic diagram that each device is combined into system of the present invention.
Embodiment
Embodiment 1, the method of measuring pointing error of astronomical telescope in real time, with reference to Fig. 1: (1). control the computer system of astronomical telescope according to the constraint condition of the sensing of astronomical telescope, observation moment, telescopical relevant information, theoretical star chart, the coupling storehouse of generative theory star chart, during for theoretical system and actual measurement star pattern matching.(2). according to the background of ccd image, details in a play not acted out on stage, but told through dialogues, flat field image, and the ccd image of input comprehensively analyzes, and sets up the mathematical model of input ccd image background estimating, for the background estimating of input ccd image.(3). according to the estimated result of input ccd image background, according to given image segmentation threshold, ccd image is carried out to full frame scanning, provide the scanning result of upper all astrology of ccd image, set up the coupling storehouse of actual measurement star chart according to this scanning result.(4). according to given coupling thresholding, characteristic matching is carried out in theoretical star chart storehouse and actual measurement star chart, the fixed star that the match is successful is used for calculating the correction of astronomical telescope error in pointing.(5). according to the result of the coupling of theoretical star chart and actual measurement star chart, according to given error correction formula, calculate the coefficient of pointing of the telescope error correction formula, thereby obtain the correction of pointing of the telescope error.(6). in the time requiring the Angle Measured Data of output region fragment, adopt the result of calculation of pointing of the telescope error, the Angle Measured Data of space junk is revised, thus the high-precision Angle Measured Data of acquisition space junk.
Control the computer system of astronomical telescope according to above-mentioned input data, provided in real time the correction of telescope error in pointing.The tracker that result of calculation can offer measuring system is used, can ensure under the less prerequisite of space junk forecast precision error, space junk appears at observation field of view center region, result of calculation also can show by display system, and be stored in the storage medium of computer system.
Claims (1)
1. a method for measuring pointing error of astronomical telescope in real time, is characterized in that, comprises following job step:
(1). theoretical star map generalization;
(2). image background is estimated;
(3). the full frame scanning of image;
(4). the coupling of theoretical star chart and actual measurement star chart;
(5). the calculating of astronomical telescope error in pointing;
(6). according to step result of calculation (5), revise the angle measurement value of space junk, improve the angle measurement accuracy of space junk;
The step (1) concrete operations of described theoretical star map generalization is: control the computer system of astronomical telescope according to the constraint condition of the sensing of astronomical telescope, observation moment, telescopical relevant information, theoretical star chart, the coupling storehouse of generative theory star chart, during for theoretical system and actual measurement star pattern matching;
The step (2) concrete operations of described image background estimation is: according to the background of ccd image, details in a play not acted out on stage, but told through dialogues, flat field image, and the ccd image of input is comprehensively analyzed, set up the mathematical model of input ccd image background estimating, for the background estimating of input ccd image;
The step (3) concrete operations of the full frame scanning of described image is: according to the estimated result of input ccd image background, according to given image segmentation threshold, ccd image is carried out to full frame scanning, provide the scanning result of upper all astrology of ccd image, set up the coupling storehouse of actual measurement star chart according to this scanning result;
The step (4) concrete operations of the coupling of described theoretical star chart and actual measurement star chart is: according to given coupling thresholding, characteristic matching is carried out in theoretical star chart storehouse and actual measurement star chart, the fixed star that the match is successful is used for calculating the correction of astronomical telescope error in pointing;
The step (5) concrete operations of the calculating of described astronomical telescope error in pointing is: according to the result of the coupling of theoretical star chart and actual measurement star chart, according to given error correction formula, calculate the coefficient of pointing of the telescope error correction formula, thereby obtain the correction of pointing of the telescope error;
The step (6) concrete operations of the angle measurement value of described correction space junk is: in the time requiring the Angle Measured Data of output region fragment, the result of calculation of the astronomical telescope error in pointing (5) obtaining according to step, Angle Measured Data to space junk is revised, thereby obtains the high-precision Angle Measured Data of space junk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110361031.6A CN102494872B (en) | 2011-11-15 | 2011-11-15 | Method for measuring pointing error of astronomical telescope in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110361031.6A CN102494872B (en) | 2011-11-15 | 2011-11-15 | Method for measuring pointing error of astronomical telescope in real time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102494872A CN102494872A (en) | 2012-06-13 |
| CN102494872B true CN102494872B (en) | 2014-08-06 |
Family
ID=46186714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110361031.6A Expired - Fee Related CN102494872B (en) | 2011-11-15 | 2011-11-15 | Method for measuring pointing error of astronomical telescope in real time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102494872B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106200697B (en) * | 2016-09-06 | 2018-12-07 | 中国科学院上海天文台 | A kind of radio telescope direction real-time correcting method |
| CN107272181B (en) * | 2017-07-20 | 2019-08-27 | 中国科学院光电技术研究所 | Method for improving pointing accuracy of small area of telescope |
| CN110580060B (en) * | 2019-09-30 | 2022-07-26 | 中国科学院国家天文台南京天文光学技术研究所 | Method for correcting pointing error of biaxial rotation system based on spherical cap function |
| CN110926501B (en) * | 2019-11-08 | 2022-03-22 | 中国科学院长春光学精密机械与物理研究所 | Automatic calibration method and system for optical measurement equipment and terminal equipment |
| CN111121822B (en) * | 2019-12-25 | 2021-07-20 | 南京先进激光技术研究院 | Method for solving automatic correction pointing of star sensor camera by utilizing image recognition |
| CN111156988B (en) * | 2019-12-31 | 2021-03-16 | 中国科学院紫金山天文台 | Space debris astronomical positioning and photometry method based on automatic pointing error determination |
| CN113066021B (en) * | 2021-03-15 | 2022-03-15 | 中国科学院长春光学精密机械与物理研究所 | Image feature matching-based on-orbit aberration compensation method for space telescope |
| CN113532810B (en) * | 2021-09-17 | 2021-12-14 | 武汉锐科光纤激光技术股份有限公司 | QBH pointing error testing device and method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3635689A1 (en) * | 1986-10-21 | 1988-05-05 | Messerschmitt Boelkow Blohm | METHOD FOR MEASURING THE OPTICAL AXIS OF A GUIDE PROJECTOR AND DEVICE FOR IMPLEMENTING THE METHOD |
| IL112395A (en) * | 1995-01-19 | 1998-09-24 | Rotlex 1994 Ltd | Optical device and a method of utilizing such device for optically examining objects |
| FR2776068B1 (en) * | 1998-03-16 | 2000-06-23 | Commissariat Energie Atomique | METHOD FOR ALIGNING AN OBJECT WITH AN IMAGE ACQUISITION DEVICE AND A COUPLING OPTIC |
| CN1693846A (en) * | 2005-06-20 | 2005-11-09 | 中国科学院紫金山天文台 | Precision measuring system for space target |
| CN100504300C (en) * | 2007-01-22 | 2009-06-24 | 北京航空航天大学 | Method for recognizing non-gauged star map |
| CN101846511B (en) * | 2010-04-29 | 2012-02-22 | 中国科学院紫金山天文台 | Detection system of space debris |
-
2011
- 2011-11-15 CN CN201110361031.6A patent/CN102494872B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102494872A (en) | 2012-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102494872B (en) | Method for measuring pointing error of astronomical telescope in real time | |
| CN102374856B (en) | Measuring method for real-time accurate direction of astronomical telescope | |
| CN102506829B (en) | Rapid star map matching method | |
| US8654193B2 (en) | Method for registering model data for optical recognition processing and optical sensor | |
| CN108012143B (en) | Binocular camera calibration method and device | |
| CN105486312B (en) | A kind of star sensor and high frequency angular displacement sensor integrated attitude determination method and system | |
| CN107044852B (en) | Total station survey method under out-of-flatness state | |
| CN110570449A (en) | positioning and mapping method based on millimeter wave radar and visual SLAM | |
| EP2518663A3 (en) | Object recognition method and recognition apparatus | |
| WO2012177740A3 (en) | Thermal imager that analyzes temperature measurement calculation accuracy | |
| JP2014518123A5 (en) | ||
| CN110595479B (en) | SLAM track evaluation method based on ICP algorithm | |
| CN109465830B (en) | Robot monocular stereoscopic vision calibration system and method | |
| CN109579956A (en) | A kind of intelligent limit method for measuring weight, device, electronic equipment and storage medium of raising pigs | |
| CN101865656B (en) | Method for accurately positioning position of multi-camera system by using small number of coplanar points | |
| CN106671081B (en) | A kind of lower-mobility robot kinematics calibration method based on monocular vision | |
| Babapour et al. | A novel post-calibration method for digital cameras using image linear features | |
| CN107843259B (en) | Multi-robot collaborative navigation positioning method based on VCKF | |
| CN102410844A (en) | Method and device for correcting non-uniformity of image of high-dynamic star sensor | |
| CN103092814A (en) | Universal least square adjustment method used for measuring data | |
| CN203657805U (en) | Laser centering module for total station | |
| CN113932765B (en) | High-precision static level based on temperature compensation and temperature compensation method thereof | |
| CN102494674A (en) | High precision positioning method of dark space debris | |
| CN110515884B (en) | Construction site reinforcing bar range unit based on image analysis | |
| CN114391822A (en) | Data correction method, data correction device, electronic device, and readable storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20141115 |
|
| EXPY | Termination of patent right or utility model |