CN103323856A - Method for locating non-cooperative wireless signal source based on high-rail three-satellite time-difference system - Google Patents
Method for locating non-cooperative wireless signal source based on high-rail three-satellite time-difference system Download PDFInfo
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Abstract
The invention discloses a method for locating a non-cooperative wireless signal source based on a high-rail three-satellite time-difference system. The method for locating the non-cooperative wireless signal source based on the high-rail three-satellite time-difference system is achieved through a high-rail signal detecting-receiving locating constellation and a ground system, wherein the high-rail signal detecting-receiving locating constellation is deployed above a particular region and is composed of three satellites which run in an inclined geosynchronous small-eccentricity elliptical orbit, the three satellites have the same circular ground track, the constellation is provided with an equilateral stable triangular configuration and thousands of kilometers of inter-satellite baselines which are even and stable, each satellite conducts real-time and continuous detection and receiving on radar signals or communication signals transmitted by the ground non-cooperative wireless signal source, signal detection and parameter measurement are respectively finished, a satellite-ground link arranged on each satellite so that measurement information can be transmitted downward to the ground system in real time, and the ground system conducts processing and resolving according to the time difference of signal detection and receiving among the three satellites. The high-rail three-satellite time-difference system is adopted so that locating of the non-cooperative wireless signal source can be achieved. The method for locating the non-cooperative wireless signal source based on the high-rail three-satellite time-difference system has the remarkable advantages of being large in coverage area, strong in real-time performance, stable in locating precision and the like.
Description
Technical field
The present invention relates to a kind of non-cooperative wireless electric signal source localization method based on high rail Samsung time difference system, relate in particular to a kind of non-cooperative wireless electric signal source wide area real-time stabilization localization method based on high rail Samsung time difference system, belong to the electronic reconnaissance technical field.
Background technology
The location positioning of non-cooperative wireless electric signal source is for the radio frequency resource management and avoid disturbing mutually of different radio equipment room significant, realizes that larger coverage, better real-time, more stable bearing accuracy have become the development trend of non-cooperative wireless electric signal source location technology.Current, the location of non-cooperative wireless electric signal source is mainly undertaken by space-based electronic reconnaissance means, location method comprises single star anglefinding position fixing, single star direction finding location, many stars time difference location etc.The bearing accuracy of single star angle measurement, direction finding location method is limited, and many stars time difference location method only has application at low rail reconnaissance spacecraft for a long time, to the restriction of signal source location owing to Covering time, causes coverage, real-time, precision stability limited.
Summary of the invention
The technical matters that the present invention solves is: for existing methodical deficiency, propose a kind of non-cooperative wireless electric signal source localization method based on high rail Samsung time difference system, the method has advantages of that coverage is large, real-time, bearing accuracy is stable.
The present invention includes following technical scheme: based on the non-cooperative wireless electric signal source localization method of high rail Samsung time difference system, step is as follows:
(1) to three satellite of geostationary orbit emission;
(2) three satellite transits are at the equal identical synchronous elliptical orbit of the inclination earth of semi-major axis, excentricity, inclination angle, argument of perigee, argument of perigee is 90 ° or 270 °, three satellites keep altogether ground circular trace, and space distribution is the equilateral triangle configuration, and Inter-satellite Baseline length is more than 1 km;
(3) three satellites are detectd receipts in real time to radar or the signal of communication of the non-cooperative wireless electric signal source emission in ground respectively, the time of arrival (toa) that measures is passed to land station by satellite-ground link in real time, land station calculates three signals between the satellite, and to detect the time receiving poor, the poor positional information that calculates the non-cooperative wireless electric signal source in ground of time receiving is detectd according to the signal between three satellites by land station, realizes the real-time location to the non-cooperative wireless electric signal source in ground.
The poor method of resolving the positional information of the non-cooperative wireless electric signal source in ground of time receiving is detectd according to the signal that calculates by land station: the coordinate of three non-cooperative wireless electric signal sources of satellite and ground in the earth rectangular coordinate system is respectively S
0(x
0, y
0, z
0), S
1(x
1, y
1, z
1), S
2(x
2, y
2, z
2), the time difference value between the T (x, y, z), three satellites is respectively Δ t
1With Δ t
2, c is electromagnetic wave propagation speed, and a is the semi-major axis of earth ellipsoid, and e is the excentricity of earth ellipsoid, sets up the time difference measurement system of equations:
Find the solution the time difference measurement system of equations, can obtain the position (x, y, z) of the non-cooperative wireless electric signal source in ground.
The present invention compared with prior art has following advantage:
(1) the present invention adopts high rail constellation to carry out the location of the non-cooperative wireless electric signal source in ground, constellation centering low latitude specific region all the time as seen, covering radius reaches thousands of kms, can realize the non-cooperative wireless electric signal in ground detectd receipts in real time, continuously;
(2) the present invention proposes a kind of Constellation configuration that is applicable to high rail Samsung time difference location, the synchronous small eccentricity rate of the inclination earth elliptical orbit of design has been realized the Samsung common ground track, uniform and stable equilateral triangle configuration provides good observation geometric condition with the Inter-satellite Baseline that reaches thousands of kms for Samsung time difference hi-Fix, and is high and stable to the bearing accuracy of non-cooperative wireless electric signal source;
(3) technology such as integrated use star of the present invention ground real-time link, in real time processing of the ground real-time location of having realized non-cooperative wireless electric signal source can be satisfied application demand better;
(4) the present invention proposes the multi-signal that is applicable to high rail Samsung time difference location and scout pattern, Samsung possesses the wide area search ability of discovery of non-cooperative wireless electric signal by frequency sweep mode, possess the lasting tracking power of non-cooperative wireless electric signal by frequency hopping, resident isotype.
Description of drawings
Fig. 1 is that the present invention detects the principle schematic of receiving the location to non-cooperative wireless electric signal source;
Fig. 2 is equilateral triangle Constellation configuration figure of the present invention;
Fig. 3 is Samsung TOA difference locating principle figure of the present invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
The real-time high stability localization method of non-cooperative wireless electric signal source wide area based on high rail Samsung time difference system, adopt high rail signal to detect and receive location constellation realization, this constellation is deployed in the sky, specific region, formed by 3 geostationary satellites, echo signal is carried out real-time continuous detect receipts, detection and parameter measurement, ground system positions to be processed and resolves, and guarantees required Satellite Orbit Determination and the timing tracking accuracy of hi-Fix by real-time satellite-ground link.
As shown in Figure 1, high rail signal is detectd receipts location constellation and is deployed in the sky, specific region, is comprised of 3 reconnaissance spacecrafts, and centering low latitude specific region all the time as seen, coverage reaches thousands of kms, can realize detecing to the wide area of the non-cooperative wireless electric signal in ground, in real time, continuously receipts.Concrete methods of realizing is:
(1) to three satellite of geostationary orbit emission;
(2) three satellite transits are at the equal identical synchronous elliptical orbit of the inclination earth of semi-major axis, excentricity, inclination angle, argument of perigee, argument of perigee is 90 ° or 270 °, three satellites keep altogether ground circular trace, and space distribution is the equilateral triangle configuration, and Inter-satellite Baseline length is more than 1 km;
(3) three satellites are detectd receipts in real time to radar or the signal of communication of the non-cooperative wireless electric signal source emission in ground respectively, the time of arrival (toa) that measures is passed to land station by satellite-ground link in real time, land station calculates three signals between the satellite, and to detect the time receiving poor, the poor positional information that calculates the non-cooperative wireless electric signal source in ground of time receiving is detectd according to the signal between three satellites by land station, realizes the real-time location to the non-cooperative wireless electric signal source in ground.
The Samsung Constellation configuration as shown in Figure 2,3 stars are designated as A, B, C, the ground trace center of circle is designated as O.3 stars operate in semi-major axis, excentricity, the inclination angle, argument of perigee is the identical synchronous small eccentricity rate of inclination earth elliptical orbit all, argument of perigee is 90 ° or 270 °, composite design by inclination angle and excentricity is so that 3 star ground traces are circle, and the design by each star right ascension of ascending node and phase place can realize 3 star common ground tracks, space distribution is uniform and stable equilateral triangle configuration, Inter-satellite Baseline length reaches more than 1,000 kms, for Samsung time difference location provides good observation geometric condition, be conducive to the high precision of non-cooperative wireless electric signal source, the high stability location.3 satellite configuration have high-gain aerial, high sensitivity Radar signal receiver, high sensitivity communication signal receiver, possess frequency sweep, frequency hopping, the multi-signal such as resident is scouted pattern, realize the wide area search discovery of radar, signal of communication by frequency sweep mode, realize the lasting tracking of radar, signal of communication by frequency hopping, resident isotype, utilize satellite-ground link to pass down in real time metrical information, process in real time on ground, and the non-cooperative wireless electric signal source in the thousands of kilometer range in ground is possessed real-time station-keeping ability.
The Samsung TOA difference locating principle by the time of arrival of Samsung difference instrumentation radar or signal of communication, carries out the target location according to the signal time difference between star and resolves as shown in Figure 3, finishes the location to non-cooperative wireless electric signal source.S
0, S
1, S
2Be respectively three satellites, can obtain two independently signal arrival time differences, each time difference can be determined the position point set that a hyperboloid of one sheet comprises, and three satellites can consist of A
1, A
2Two hyperboloid of one sheets, two hyperboloid of one sheets intersect two curve L of formation with earth surface respectively
1, L
2, the intersection point of two curves is the position that the terrestrial radiation source is target.Generally speaking, A
1, A
2With in the common factor of the contained position of earth surface a point R is only arranged, two some R and R ' can appear when the Samsung irrational distribution, wherein R is the actual position of radiation source, R ' is the position of false radiation source.Along with the motion of satellite, R ' disperses, and R then is stable convergence.
The coordinate of three non-cooperative wireless electric signal sources of satellite and ground in the earth rectangular coordinate system is respectively S
0(x
0, y
0, z
0), S
1(x
1, y
1, z
1), S
2(x
2, y
2, z
2), the time difference value between the T (x, y, z), three satellites is respectively Δ t
1With Δ t
2, c is electromagnetic wave propagation speed, and a is the semi-major axis of earth ellipsoid, and e is the excentricity of earth ellipsoid, sets up the time difference measurement system of equations:
Find the solution the time difference measurement system of equations, can obtain the position T (x, y, z) of the non-cooperative wireless electric signal source in ground in the earth rectangular coordinate system.
Embodiment: the basic parameter of adoptable a kind of constellation scheme is as shown in the table:
| ? | The A star | The B star | The C star |
| Classification of track | The inclination synchronous orbit | The inclination synchronous orbit | The inclination synchronous orbit |
| Cycle | 23.934h | 23.934h | 23.934h |
| Excentricity | 0.024 | 0.024 | 0.024 |
| Orbit inclination | 2.4° | 2.4° | 2.4° |
| Argument of perigee | 270° | 270° | 270° |
| Longitude of ascending node | 122.75° | 122.75° | 122.75° |
| Initial mean anomaly | 0° | 120° | 240° |
A, B, C Samsung form stable equilateral triangle configuration, and base length is about 3400km, and the earth coverage area territory radius centered by substar reaches 5500km.Get TOA measurement accuracy 50ns, satellite Absolute position measurement precision 20m, satellite relative position measurement precision 10m.When system adopted Samsung time difference system to the non-cooperative wireless electric signal source location in the overlay area, ground, bearing accuracy was better than 0.5km.
The content that is not described in detail in the instructions of the present invention belongs to those skilled in the art's known technology.
Claims (2)
1. based on the non-cooperative wireless electric signal source localization method of high rail Samsung time difference system, it is characterized in that step is as follows:
(1) to three satellite of geostationary orbit emission;
(2) three satellite transits are at the equal identical synchronous elliptical orbit of the inclination earth of semi-major axis, excentricity, inclination angle, argument of perigee, argument of perigee is 90 ° or 270 °, three satellites keep altogether ground circular trace, and space distribution is the equilateral triangle configuration, and Inter-satellite Baseline length is more than 1 km;
(3) three satellites are detectd receipts in real time to radar or the signal of communication of the non-cooperative wireless electric signal source emission in ground respectively, the time of arrival (toa) that measures is passed to land station by satellite-ground link in real time, land station calculates three signals between the satellite, and to detect the time receiving poor, the poor positional information that calculates the non-cooperative wireless electric signal source in ground of time receiving is detectd according to the signal between three satellites by land station, realizes the real-time location to the non-cooperative wireless electric signal source in ground.
2. the non-cooperative wireless electric signal source localization method based on high rail Samsung time difference system according to claim 1 is characterized in that: described land station detects the poor method of resolving ground non-cooperative wireless electric signal source positional information of time receiving according to the signal that calculates and is: the coordinate of three non-cooperative wireless electric signal sources of satellite and ground in the earth rectangular coordinate system is respectively S
0(x
0, y
0, z
0), S
1(x
1, y
1, z
1), S
2(x
2, y
2, z
2), the time difference value between the T (x, y, z), three satellites is respectively Δ t
1With Δ t
2, c is electromagnetic wave propagation speed, and a is the semi-major axis of earth ellipsoid, and e is the excentricity of earth ellipsoid, sets up the time difference measurement system of equations:
Find the solution the time difference measurement system of equations, can obtain the positional information T (x, y, z) of the non-cooperative wireless electric signal source in ground.
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Cited By (6)
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|---|---|---|---|---|
| CN103678787A (en) * | 2013-11-29 | 2014-03-26 | 中国空间技术研究院 | Sub-satellite point circular geosynchronous orbit design method |
| CN104849737A (en) * | 2015-04-28 | 2015-08-19 | 中国电子科技集团公司第三十六研究所 | Satellite positioning system and positioning method |
| CN110554373A (en) * | 2019-08-25 | 2019-12-10 | 中国科学院国家授时中心 | Interferometric time measuring and ranging method |
| CN112731480A (en) * | 2020-11-10 | 2021-04-30 | 北京航空航天大学 | Ground signal source direct positioning method based on low-earth orbit satellite |
| CN113359159A (en) * | 2021-05-28 | 2021-09-07 | 中国人民解放军63921部队 | Multi-satellite positioning and orbit determination precision rapid analysis method for space-based space target monitoring |
| CN117687056A (en) * | 2024-02-02 | 2024-03-12 | 齐鲁卫星技术(山东)有限责任公司 | Communication and electronic signal satellite-ground joint positioning method based on differential time difference |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103678787A (en) * | 2013-11-29 | 2014-03-26 | 中国空间技术研究院 | Sub-satellite point circular geosynchronous orbit design method |
| CN103678787B (en) * | 2013-11-29 | 2016-06-01 | 中国空间技术研究院 | A kind of substellar point circle mark geostationary orbits method of design |
| CN104849737A (en) * | 2015-04-28 | 2015-08-19 | 中国电子科技集团公司第三十六研究所 | Satellite positioning system and positioning method |
| CN104849737B (en) * | 2015-04-28 | 2019-01-15 | 中国电子科技集团公司第三十六研究所 | A kind of global position system and localization method |
| CN110554373A (en) * | 2019-08-25 | 2019-12-10 | 中国科学院国家授时中心 | Interferometric time measuring and ranging method |
| CN112731480A (en) * | 2020-11-10 | 2021-04-30 | 北京航空航天大学 | Ground signal source direct positioning method based on low-earth orbit satellite |
| CN112731480B (en) * | 2020-11-10 | 2023-09-29 | 北京航空航天大学 | Ground signal source direct positioning method based on low-orbit satellite |
| CN113359159A (en) * | 2021-05-28 | 2021-09-07 | 中国人民解放军63921部队 | Multi-satellite positioning and orbit determination precision rapid analysis method for space-based space target monitoring |
| CN113359159B (en) * | 2021-05-28 | 2022-09-02 | 中国人民解放军63921部队 | Multi-satellite positioning and orbit determination precision rapid analysis method for space-based space target monitoring |
| CN117687056A (en) * | 2024-02-02 | 2024-03-12 | 齐鲁卫星技术(山东)有限责任公司 | Communication and electronic signal satellite-ground joint positioning method based on differential time difference |
| CN117687056B (en) * | 2024-02-02 | 2024-05-07 | 齐鲁卫星技术(山东)有限责任公司 | Communication and electronic signal satellite-ground joint positioning method based on differential time difference |
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Application publication date: 20130925 |