CN102494674B - High precision positioning method of dark space debris - Google Patents
High precision positioning method of dark space debris Download PDFInfo
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- CN102494674B CN102494674B CN 201110368826 CN201110368826A CN102494674B CN 102494674 B CN102494674 B CN 102494674B CN 201110368826 CN201110368826 CN 201110368826 CN 201110368826 A CN201110368826 A CN 201110368826A CN 102494674 B CN102494674 B CN 102494674B
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Abstract
A high precision positioning method of dark space debris comprises the following working steps: (1) acquiring three continuous frames of CCD images; (2) calculating negative models of a first frame image and a third frame image; (3) calculating a negative model of a second frame image; (4) positioning a dark space debris; (5) carrying out the above four steps to finally obtain a positioning result of the dark space debris on the second frame CCD image; and (6) storing and displaying the positioning result. The method of the invention can realize high precision positioning on the dark space debris, when the CCD image has a long exposure time, and is quite a good method for positioning the dark space debris. The method has good actual treatment and can be widely applied to monitoring of space debris.
Description
Technical field
The present invention relates to a kind of real-time dark weak space junk localization method, and it can realize dark weak space junk hi-Fix in the situation that the ccd image time shutter is long, be a kind of extraordinary dark a little less than the localization method of space junk.
Background technology
In many fields such as scientific research, military affairs, all need space junk is monitored, thereby position and the variation thereof of each moment that provides space junk on high, determine the orbit of space junk, thereby obtain the accurate information of space junk, thereby the relevant information that provides at the rail spacecraft is provided.
The invention of CCD has substituted traditional camera observation, becomes one of effective means of space junk supervision, especially the space junk of centering high orbit.In the process to space junk observation, in order to improve the bearing accuracy of space junk, usually the exposure of ccd image there is certain requirement, usually require when following the tracks of space junk, the length breadth ratio of the astrology of background fixed star is less than 3, and the bearing accuracy that so just can guarantee space junk is better than half of CCD Pixel domain resolution.Due to integral time in short-term, dark weak space junk on ccd image become the signal to noise ratio (S/N ratio) of the astrology lower, or cause and its astrology to be detected or astrology bearing accuracy is low, so in order to improve the astrology signal to noise ratio (S/N ratio) of dark weak space junk, namely improve the bearing accuracy of dark weak space junk, just must increase the time shutter of ccd image.If yet the time shutter of ccd image is longer, on ccd image, the astrology track of background fixed star becomes very long, and the length breadth ratio that is exactly its astrology becomes large, thereby has reduced the signal to noise ratio (S/N ratio) of the background fixed star astrology, reduce the bearing accuracy of the fixed star astrology, therefore affected the bearing accuracy of dark weak space junk.So this method just is based under this background and puts forward, it can in the situation that the ccd image time shutter is long, realize the hi-Fix of dark weak space junk.
Summary of the invention
The invention provides a kind of dark weak space junk high-precision locating method, (time shutter of the 1st and 3 two field pictures is short for three two field pictures that can be by continuous acquisition, the time shutter of the 2nd two field picture is long), by calculating the egative film transaction module of the 1st and 3 two field pictures, provide high-precision egative film transaction module, thereby provide the positioning result of the dark weak space junk on the second frame.
The technical scheme of completing the foregoing invention task is: a kind of dark weak space junk high-precision locating method comprises following job step:
⑴. gather continuous three frame ccd images;
⑵. the calculating of the egative film model of the 1st frame and the 3rd two field picture;
⑶. the calculating of the egative film model of the 2nd two field picture;
⑷. the location of dark weak space junk;
⑸. adopt successively above-mentioned four steps, obtain at last the positioning result of the dark weak space junk on the 2nd frame ccd image;
⑹. the storage of positioning result and demonstration.
More optimize with more specifically above each step of description is as follows:
⑴. gather continuous three frame ccd images
When following the tracks of dark weak space junk, observation software continuous acquisition 3 two field pictures, wherein the time shutter of the 1st and 3 frame figures short, the time shutter of the 2nd two field picture is long.The 3 frame ccd images that gather comprise corresponding time and directional information, are stored in the buffer zone of calculator memory appointment.
⑵. the egative film model of the 1st frame and the 3rd two field picture
⑶. according to 3 two field pictures that gather in the ⑴ step, by the matching result of theoretical star chart and actual measurement star chart, calculate the egative film model of the 1st frame and the 3rd two field picture, during for dark weak space junk location.
⑷. the location of dark weak space junk;
According to the egative film the model calculation of the 2nd two field picture, input the astrology gray scale center-of-mass coordinate of dark weak space junk, provide the positioning result of dark weak space junk.
⑸, observation software systems repeat above-mentioned steps, can observe dark weak space junk;
⑹. the positioning result of dark weak space junk is shown by display system, and be stored in the storage medium of computer system.
Each step involved in the present invention is carried out and is completed by observation software; This observation software can be on the basis of the observation software of prior art, increases step of the present invention and partly consists of.
Dark weak space junk high-precision locating method of the present invention can be realized the hi-Fix to dark weak space junk in the situation that the ccd image time shutter is long, is a kind of extraordinary a kind of dark weak space junk localization method.The actual processing effect of the method is good, can be widely applied in the space junk monitoring.
In the present invention, when detecting dark weak space junk, guaranteed the signal to noise ratio (S/N ratio) of dark weak space junk, shortened again the length breadth ratio of the astrology of background fixed star, make so dark weak space junk and background fixed star that very high bearing accuracy is arranged, thereby make the bearing accuracy that has improved dark weak space junk.Under traditional localization method and long exposure status, the astrology of background fixed star are very long, can cause like this bearing accuracy of fixed star can only reach several pixels, cause simultaneously the fixed star number that can participate in calibrating to reduce.In order to take into account both, make the signal to noise ratio (S/N ratio) of dark weak fragment lower, so just cause the bearing accuracy of dark weak space junk can only be better than several pixels, make the bearing accuracy of fixed star can be better than 0.5 pixel by this localization method, the bearing accuracy of dark weak fragment also can be better than 0.5 pixel, has so just realized the hi-Fix of dark weak space junk.
Description of drawings
Fig. 1 is combined into the schematic diagram of system of the present invention for each device.
Embodiment
Embodiment 1, with reference to Fig. 1: carry out according to following steps:
⑴. gather continuous three frame ccd images
When following the tracks of dark weak space junk, observation software continuous acquisition 3 two field pictures, wherein the time shutter of the 1st and 3 frame figures short, the time shutter of the 2nd two field picture is long.The 3 frame ccd images that gather comprise corresponding time and directional information, are stored in the buffer zone of calculator memory appointment.
⑵. the egative film model of the 1st frame and the 3rd two field picture
⑶. according to 3 two field pictures that gather in the ⑴ step, by the matching result of theoretical star chart and actual measurement star chart, calculate the egative film model of the 1st frame and the 3rd two field picture, during for dark weak space junk location.
⑷. the location of dark weak space junk;
According to the egative film the model calculation of the 2nd two field picture, input the astrology gray scale center-of-mass coordinate of dark weak space junk, provide the positioning result of dark weak space junk.
⑸, observation software systems repeat above-mentioned steps, can observe dark weak space junk;
⑹. the positioning result of dark weak space junk is shown by display system, and be stored in the storage medium of computer system.
Claims (1)
1. a dark weak space junk high-precision locating method, is characterized in that, job step is as follows:
⑴. gather continuous three frame ccd images
When following the tracks of dark weak space junk, observation software continuous acquisition 3 two field pictures, wherein the time shutter of the 1st and 3 frame figures short, the time shutter of the 2nd two field picture is long; The 3 frame ccd images that gather comprise corresponding time and directional information, are stored in the buffer zone of calculator memory appointment;
⑵. the calculating of the egative film model of the 1st frame and the 3rd two field picture;
⑶. according to 3 two field pictures that gather in the ⑴ step, by the matching result of theoretical star chart and actual measurement star chart, calculate at step ⑵ on the basis of egative film model of the 1st frame and the 3rd two field picture, then carry out the calculating of the egative film model of the 2nd two field picture; During for dark weak space junk location;
⑷. the location of dark weak space junk;
According to the egative film the model calculation of the 2nd two field picture, input the astrology gray scale center-of-mass coordinate of dark weak space junk, provide the positioning result of dark weak space junk;
⑸, observation software systems repeat above-mentioned steps, and dark weak space junk is observed;
⑹. the positioning result of dark weak space junk is shown by display system, and be stored in the storage medium of computer system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110368826 CN102494674B (en) | 2011-11-18 | 2011-11-18 | High precision positioning method of dark space debris |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110368826 CN102494674B (en) | 2011-11-18 | 2011-11-18 | High precision positioning method of dark space debris |
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| Publication Number | Publication Date |
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| CN102494674A CN102494674A (en) | 2012-06-13 |
| CN102494674B true CN102494674B (en) | 2013-06-05 |
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| CN 201110368826 Expired - Fee Related CN102494674B (en) | 2011-11-18 | 2011-11-18 | High precision positioning method of dark space debris |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110399866B (en) * | 2019-08-27 | 2021-03-16 | 中国科学院紫金山天文台 | Space debris observation method based on different exposure time alternation of CCD camera |
| CN111156989B (en) * | 2019-12-31 | 2021-03-16 | 中国科学院紫金山天文台 | Space debris real-time astronomical positioning method based on automatic pointing determination |
| CN111861859A (en) * | 2020-07-16 | 2020-10-30 | 昆宇蓝程（北京）科技有限责任公司 | Space debris collision early warning method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1168003A1 (en) * | 2000-06-22 | 2002-01-02 | Thales | Device for measuring space pollution |
| CN1710377A (en) * | 2005-06-07 | 2005-12-21 | 中国科学院紫金山天文台 | Space-target real-time astronomical positioning method |
| CN1896681A (en) * | 2005-07-15 | 2007-01-17 | 北京航空航天大学 | Fast tracting method of star sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3922520B2 (en) * | 2001-01-26 | 2007-05-30 | 独立行政法人 宇宙航空研究開発機構 | Method for detecting an object having a known motion on a celestial sphere |
| JP3671220B2 (en) * | 2002-04-30 | 2005-07-13 | 独立行政法人 宇宙航空研究開発機構 | Moving object detection method |
| JP5647430B2 (en) * | 2010-04-02 | 2014-12-24 | 株式会社Ihi | Space debris observation method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1168003A1 (en) * | 2000-06-22 | 2002-01-02 | Thales | Device for measuring space pollution |
| CN1710377A (en) * | 2005-06-07 | 2005-12-21 | 中国科学院紫金山天文台 | Space-target real-time astronomical positioning method |
| CN1896681A (en) * | 2005-07-15 | 2007-01-17 | 北京航空航天大学 | Fast tracting method of star sensor |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2002-220098A 2002.08.06 |
| JP特开2011-218834A 2011.11.04 |
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