CN103698767A - Method and device of obtaining distance between space target and observation station - Google Patents
Method and device of obtaining distance between space target and observation station Download PDFInfo
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- CN103698767A CN103698767A CN201310751685.9A CN201310751685A CN103698767A CN 103698767 A CN103698767 A CN 103698767A CN 201310751685 A CN201310751685 A CN 201310751685A CN 103698767 A CN103698767 A CN 103698767A
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- extraterrestrial target
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
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Abstract
The embodiment of the invention provides a method and a device of obtaining the distance between a space target and an observation station. The method comprises the steps of firstly obtaining historical data comprising the corresponding relation of time and space target optical position information and the distance information between the space target and the observation station; speculating data of future moment by the historical data, namely, a space region where a next moment space target possibly appears; when the next moment arrives, obtaining an optical position deviation value between the predicted position information of the space target, which is speculated, and the actual position information of the space target; speculating a distance modification value of the distance information between the current moment space target and the observation station according to the optical position deviation values of the space target at different moments, thus performing amendment on the distance between the space target and the observation station, which is forecast and provided in advance, accurately calculating the time of starting a single photon detector, and detecting weak echo by the single photon detector.
Description
Technical field
The present invention relates to uranometry field, in particular, relate to obtain method and the device of extraterrestrial target and research station distance.
Background technology
In space surveillance technology of future generation, extraterrestrial target laser ranging (Satellite Laser Ranging, SLR) be to measure the single-photon detector of research station and the technology of the distance between extraterrestrial target, extraterrestrial target laser ranging refers to from the generating laser of research station sends laser pulse, faint echo (one or more photon) after the reflection of extraterrestrial target reflecting surface is observed the single-photon detector at station and surveys, and by accurate measurement laser pulse, can calculate the distance of single-photon detector and the extraterrestrial target of research station two-way time.
Single-photon detector can be surveyed faint echo after being unlocked, and the work period of single-photon detector (being unlocked and the pent mistiming) is very short, generally in 1000 nanoseconds, in order to allow single-photon detector can detect faint echo, need to control single-photon detector and be unlocked to single-photon detector at faint echo reflection.Can be according to the distance between the transmission speed of faint echo (light velocity) and single-photon detector and the reflecting surface of extraterrestrial target, determine faint echo and from the reflecting surface of extraterrestrial target, transfer to the time of the single-photon detector of research station, thereby calculate the time of opening single-photon detector, the method is prior forecasting procedure.
Inventor finds in realizing the process of the invention, utilize the single-photon detector of research station of prior forecasting procedure acquisition and the distance between the reflecting surface of extraterrestrial target still to there is error, and the method for distance between the single-photon detector of research station and the reflecting surface of extraterrestrial target not being revised in prior art, may cause like this opening the Time Calculation mistake of single-photon detector, and can not make single-photon detector detect faint echo.
Summary of the invention
In view of this, the invention provides a kind of method and device that obtains extraterrestrial target and research station distance, to overcome in prior art due to the method for distance between the single-photon detector of research station and the reflecting surface of extraterrestrial target not being revised, may cause like this opening the Time Calculation mistake of single-photon detector, and can not make single-photon detector detect the problem of faint echo.
For achieving the above object, the invention provides following technical scheme:
A method of obtaining distance between extraterrestrial target and research station, comprising:
A, obtain the predicted position information of described extraterrestrial target, described predicted position information comprises the prediction optical position information and corresponding relation constantly of described extraterrestrial target;
B, according to the predicted position information of described extraterrestrial target, determine next area of space that constantly described extraterrestrial target may occur, described extraterrestrial target is predicted position information in the positional information of described area of space;
C, obtain described next electronic image of described area of space constantly, and the zero hour and finish time of electronic image described in records photographing;
D, the time of exposure using the mean value of the described zero hour and the described finish time as described electronic image, and will be superimposed upon the described time of exposure in described electronic image;
E, according to described electronic image, obtain described extraterrestrial target in the actual position information of described electronic image;
F, according to described predicted position information and described actual position information, calculate the optical position departure of described extraterrestrial target;
I, repeating step B be to step F, obtains not the optical position departure of described extraterrestrial target in the same time;
G, according to described not extraterrestrial target optical position departure in the same time, calculate the distance correction value of extraterrestrial target and described research station described in current time;
H, according to the prediction distance of extraterrestrial target described in described distance correction value and described current time and described research station, obtain the corrected range of extraterrestrial target and described research station described in current time.
Wherein, after step H, described method also comprises:
K, according to described corrected range, calculate the opening time of the detector in described research station.
Wherein, described step G comprises:
I1, obtain described optical position departure and not in the same time between correspondence relationship information;
I2, obtain initial condition parameters;
I3, according to the anticipation function of range deviation, and the independent variable of the anticipation function that the prediction optical position information of described initial condition parameters, described current time, described extraterrestrial target current time of take is described range deviation, calculates the distance correction value of extraterrestrial target and described research station described in described current time.
Wherein, described step I2 specifically comprises:
According to optical position errored message amount anticipation function, and take described not prediction optical position information in the same time, described not in the same time, the described initial condition parameters independent variable that is described optical position errored message amount anticipation function, take described not in the same time optical position departure as the dependent variable of described optical position errored message amount anticipation function, utilize least square method to calculate described initial condition parameters.
Wherein, described optical position information comprises the elevation angle and position angle, and described optical position errored message amount anticipation function comprises: the anticipation function of azimuth angle deviation amount anticipation function and elevation deflection amount.
A device that obtains distance between extraterrestrial target and research station, comprising:
The first acquisition module, for obtaining the predicted position information of described extraterrestrial target, described predicted position information comprises the prediction optical position information and corresponding relation constantly of described extraterrestrial target;
The first determination module, for according to the predicted position information of described extraterrestrial target, determines next area of space that described extraterrestrial target may occur constantly, and described extraterrestrial target is predicted position information in the positional information of described area of space;
The second acquisition module, for obtaining described next electronic image of described area of space constantly, and the zero hour and finish time of electronic image described in records photographing;
Laminating module, for the time of exposure using the mean value of the described zero hour and the described finish time as described electronic image, and will be superimposed upon in described electronic image the described time of exposure;
The 3rd acquisition module, for obtaining described extraterrestrial target in the actual position information of described electronic image according to described electronic image;
The first computing module, for according to described predicted position information and described actual position information, calculates the optical position departure of described extraterrestrial target;
Trigger module, for triggering described the first determination module, to obtain not the optical position departure of described extraterrestrial target in the same time;
The second computing module, for according to described not extraterrestrial target optical position departure in the same time, calculates the distance correction value of extraterrestrial target and described research station described in current time;
The 4th acquisition module, for according to the prediction distance of extraterrestrial target described in described distance correction value and described current time and described research station, obtains the corrected range of extraterrestrial target and described research station described in current time.
Wherein, also comprise:
The 3rd computing module, for according to described corrected range, calculates the opening time of the detector in described research station.
Wherein, described the second computing module comprises:
The first acquiring unit, for obtain described optical position departure and not in the same time between correspondence relationship information;
Second acquisition unit, for obtaining initial condition parameters;
The 3rd acquiring unit, for the anticipation function according to range deviation, and the independent variable of the anticipation function that the prediction optical position information of described initial condition parameters, described current time, described extraterrestrial target current time of take is described range deviation, calculates the distance correction value of extraterrestrial target and described research station described in described current time.
Wherein, described second acquisition unit specifically for: according to optical position errored message amount anticipation function, and take described not prediction optical position information in the same time, described not in the same time, the described initial condition parameters independent variable that is described optical position errored message amount anticipation function, take described not in the same time optical position departure as the dependent variable of described optical position errored message amount anticipation function, utilize least square method to calculate described initial condition parameters.
Wherein, described optical position information comprises the elevation angle and position angle, and described optical position errored message amount anticipation function comprises: the anticipation function of azimuth angle deviation amount anticipation function and elevation deflection amount.
Known via above-mentioned technical scheme, compared with prior art, the embodiment of the present invention provides a kind of method of obtaining distance between extraterrestrial target and research station, first obtain historical data, it is the time, the corresponding relation of the range information of extraterrestrial target optical position information and extraterrestrial target and research station, by historical data, can infer and following data constantly, it is next area of space that extraterrestrial target may occur constantly, then when next arrives constantly, can obtain the predicted position information of extraterrestrial target of supposition and the optical position departure of the actual position information of this extraterrestrial target, can be according to extraterrestrial target optical position departure in the same time not, infer the distance correction value of the range information that current time extraterrestrial target and research station, thereby the extraterrestrial target that can provide prior forecast and the distance of research station are revised, thereby can calculate accurately the time of opening single-photon detector, make single-photon detector can detect faint echo.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
A kind of schematic flow sheet that obtains the method for distance between extraterrestrial target and research station that Fig. 1 provides for the embodiment of the present invention;
In a kind of method of obtaining distance between extraterrestrial target and research station that Fig. 2 provides for the embodiment of the present invention according to described not extraterrestrial target optical position departure in the same time, calculate the method flow schematic diagram of a kind of implementation of the distance correction value of extraterrestrial target and described research station described in current time;
A kind of structural representation that obtains the device of distance between extraterrestrial target and research station that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a kind of implementation of the second computing module in a kind of device that obtains distance between extraterrestrial target and research station that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Extraterrestrial target laser ranging, as a kind of precision tracking measuring technique, first needs to obtain the prediction orbit of extraterrestrial target, and this prediction orbit Shi You data center calculates according to the observation data of the past period.Prediction orbit can be with forecast deviation, but must make extraterrestrial target enter the visual field of research station, and the single-photon detector of research station just can receive the faint echo after extraterrestrial target reflection.In prior art, for passive extraterrestrial target, the most frequently used prediction orbit is two row radicals (Two Line Element, TLE), the prediction orbit with TLE as extraterrestrial target laser ranging, and main difficulty is to forecast that deviation is larger.Common situation is that extraterrestrial target enters visual field, but distance forecast deviation is larger, and the single-photon detector of research station can not receive the faint echo of extraterrestrial target reflection.In order to receive and identify faint echo, can service range gating technology, range gate control techniques is a kind of time filtering technology, can calculate by the distance of extraterrestrial target and research station the time that faint echo that extraterrestrial target returns is back to research station, according to faint echo, return to the time of research station, can control the time of single-photon detector opening and closing, i.e. the width of range gate.Each work period of single-photon detector is only in extremely short time window (approximately 1000 nanoseconds, by single-photon detector duty, determined) effectively interior, so it is very important controlling the time of single-photon detector unlatching, the width of range gate refers to the mistiming that being opened into of single-photon detector closed.
Referring to accompanying drawing 1, is a kind of schematic flow sheet that obtains the method for distance between extraterrestrial target and research station that the embodiment of the present invention provides, and the method comprises:
Steps A: the predicted position information that obtains described extraterrestrial target.
Described predicted position information comprises the prediction optical position information and corresponding relation constantly of described extraterrestrial target.
The actual distance referring between the reflecting surface of extraterrestrial target and the single-photon detector of research station of range information of extraterrestrial target and research station.
Extraterrestrial target, refers to the extraterrestrial target operating on Earth's orbit.Such as the Shenzhou spacecraft, artificial satellite, used rocket and remains, the fragment etc. on Earth's orbit that are retained in launch a man-made satellite..
Can people obtain not the positional information of extraterrestrial target in the same time, also can obtain by the instrument of shooting extraterrestrial target of the prior art.
Step B: according to the predicted position information of described extraterrestrial target, determine next area of space that described extraterrestrial target may occur constantly, described extraterrestrial target is predicted position information in the positional information of described area of space.
Can infer and next area of space that extraterrestrial target may occur constantly according to the extraterrestrial target positional information of having obtained, also can infer the predicted position information that next area of space that extraterrestrial target may occur at it constantly.
Step C: obtain described next electronic image of described area of space constantly, and the zero hour and finish time of electronic image described in records photographing.
Because the time of utilizing the instrument of shooting extraterrestrial target to take extraterrestrial target is a period of time, can, using the mean value of the zero hour and the finish time as above-mentioned next moment, can make so follow-up computation process more accurate.
Step D: the time of exposure using the mean value of the described zero hour and the described finish time as described electronic image, and be superimposed upon in described electronic image the described time of exposure.
Existing spatial target images in photo, has again the temporal information of taking this photo, i.e. the mean value of the zero hour and the described finish time, i.e. next above-mentioned moment.This repeats at this no longer one by one for prior art.
Step e: obtain described extraterrestrial target in the actual position information of described electronic image according to described electronic image.
Electronic image according to next moment extraterrestrial target in reality, can obtain extraterrestrial target in the actual position information of area of space.
Step F: according to described predicted position information and described actual position information, calculate the optical position departure of described extraterrestrial target.
Because the area of space in electronic photo is exactly the area of space of inferring in step B, thus can be according to extraterrestrial target the relative position information at area of space, calculate optical position departure.
Step I: repeating step B is to step F, obtains not the optical position departure of described extraterrestrial target in the same time.
Repeatedly step B is to step F, to obtain not the optical position departure of extraterrestrial target in the same time.
Repeating step B can be preset times to the number of times of step F, and this preset times can be determined according to actual conditions.Suppose the number of times of N for repeating, N starts from scratch, and whenever repeating a step B to step F, N, from adding one, when N=preset times, performs step G, and when N ≠ preset times, still repeating step B is to step F.
Can according to not in the same time the optical position departure of extraterrestrial target just can infer the correspondence relationship information that constantly with optical position departure.
Step G: according to described not extraterrestrial target optical position departure in the same time, calculate the distance correction value of extraterrestrial target and described research station described in current time.
Step H: according to the prediction distance of extraterrestrial target described in described distance correction value and described current time and described research station, obtain the corrected range of extraterrestrial target and described research station described in current time.
Described in described current time, the prediction distance of extraterrestrial target and described research station can obtain in advance, can be described current time Real-time Obtaining, the embodiment of the present invention specifically limit obtaining the time intercropping of the prediction distance of extraterrestrial target and described research station yet.
For example current time be 10: 01: 1 500 milliseconds, calculate the extraterrestrial target of current time and the prediction distance of described research station time can for 10: 01: 1 400 milliseconds, or 10: 01: 1 500 milliseconds.
The embodiment of the present invention provides a kind of method of obtaining distance between extraterrestrial target and research station, first obtain historical data, it is the time, the corresponding relation of the range information of extraterrestrial target optical position information and extraterrestrial target and research station, by historical data, can infer and following data constantly, it is next area of space that extraterrestrial target may occur constantly, then when next arrives constantly, can obtain the predicted position information of extraterrestrial target of supposition and the optical position departure of the actual position information of this extraterrestrial target, can be according to extraterrestrial target optical position departure in the same time not, infer the distance correction value of the range information that current time extraterrestrial target and research station, thereby the extraterrestrial target that can provide prior forecast and the distance of research station are revised, thereby can calculate accurately the time of opening single-photon detector, make single-photon detector can detect faint echo.
In the above-mentioned embodiment of the method for obtaining distance between extraterrestrial target and research station, after step H, can also comprise: K, according to described corrected range, calculates the opening time of the detector in described research station.
Refer to Fig. 2, in a kind of method of obtaining distance between extraterrestrial target and research station providing for the embodiment of the present invention according to described not extraterrestrial target optical position departure in the same time, the method flow schematic diagram that calculates a kind of implementation of the distance correction value of extraterrestrial target and described research station described in current time, the method comprises:
Step I1: obtain described optical position departure and not in the same time between correspondence relationship information.
Gather not (ti in the same time, Ai, Ei, Δ Ai, Δ Ei) value (at least three groups), wherein, ti specifies i constantly, and Ai, Ei refer to respectively i position angle and the elevation angle constantly, i.e. i optical position information constantly, Δ Ai is the i true bearing angle and the azimuthal departure of prediction of extraterrestrial target constantly, and Δ Ei is the i actual elevation angle of extraterrestrial target and the departure at the prediction elevation angle constantly, and i is more than or equal to 1 positive integer.
Optical position departure and not in the same time between correspondence relationship information can be the corresponding relation of (ti, Ai, Ei, Δ Ai, Δ Ei).
Step I2: obtain initial condition parameters.
Step I3: according to the anticipation function of range deviation, and the independent variable of the anticipation function that the prediction optical position information of described initial condition parameters, described current time, described extraterrestrial target current time of take is described range deviation, calculates the distance correction value of extraterrestrial target and described research station described in described current time.
Due to prediction optical position information and the initial condition parameters of known above-mentioned current time, described extraterrestrial target current time, bring these parameters into first function, can obtain the optical position departure of described extraterrestrial target.
The anticipation function of supposing range deviation is Δ R=F3 (t, A, E, x1, x2, x3), wherein Δ R is distance correction value to be asked, and F3 is the anticipation function of range deviation, and t is current time, A, E be respectively current time extraterrestrial target prediction position angle, prediction the elevation angle, predict optical position information.Wherein, t, A, E, x1, x2 and x3 are known quantities, and substitution function F 3 can be calculated distance correction value Δ R.
The embodiment of the present invention also provides a kind of initial condition parameters method of obtaining in method of obtaining distance between extraterrestrial target and research station, the method comprises: according to optical position errored message amount anticipation function, and take described not prediction optical position information in the same time, described not in the same time, the described initial condition parameters independent variable that is described optical position errored message amount anticipation function, take described not in the same time optical position departure as the dependent variable of described optical position errored message amount anticipation function, utilize least square method to calculate described initial condition parameters.
Described optical position information comprises the elevation angle and position angle, and described optical position errored message amount anticipation function comprises: the anticipation function of azimuth angle deviation amount anticipation function and elevation deflection amount.Suppose that initial condition parameters is x1, x2 and x3, azimuth angle deviation amount anticipation function can be F1 (ti, Ai, Ei, x1, x2, x3)=Δ Ai, the anticipation function of elevation deflection amount can be F2 (ti, Ai, Ei, x1, x2, x3)=Δ Ei, t=1 wherein, 2, ..., n, x1, x2 and x3 are initial condition parameters.The formula that calculates initial condition parameters is as follows:
F1(ti，Ai，Ei，x1，x2，x3)=ΔAi(t=1,2,...,n)；
F2(ti，Ai，Ei，x1，x2，x3)=ΔEi(t=1,2,...,n)；
In above-mentioned parameter, Δ Ai, Δ Ei, ti, Ai, Ei, be known quantity.In conjunction with least square method, solve above-mentioned simultaneous equations, get final product to obtain the value of initial condition parameters x1, x2 and x3.
For those skilled in the art understand the beneficial effect that obtains the method for distance between extraterrestrial target and research station that the embodiment of the present invention provides more, applicant utilizes the method for obtaining distance between extraterrestrial target and research station that the embodiment of the present invention provides to carry out test of many times, obtain following result: the optical position information of the method acquisition and processing extraterrestrial target that obtains distance between extraterrestrial target and research station providing by the embodiment of the present invention, use special algorithm Δ R=F (t, A, E, Δ A, Δ E) resolve distance correction value, and adjust in time range gate, revise in real time most range deviation, can be by the prediction distance drift correction that reaches 3km-4km in 100m, make extraterrestrial target enter the effective scope of detection of satellite laser range-measurement system, thereby improve observed efficiency and success ratio.In addition, reducing of range rate, makes automatic identification data become possibility.
The method of obtaining distance between extraterrestrial target and research station that the embodiment of the present invention provides, the image acquisition device of using, computing machine etc. can be all common apparatus cheaply, so cost is lower.
In the disclosed embodiment of the invention described above, describe method in detail, for method of the present invention, can adopt the device of various ways to realize, therefore the invention also discloses a kind of device, provide specific embodiment below and be elaborated.
Refer to Fig. 3, a kind of structural representation that obtains the device of distance between extraterrestrial target and research station providing for the embodiment of the present invention, this device comprises: the first acquisition module 301, the first determination module 302, the second acquisition module 303, laminating module 304, the 3rd acquisition module 305, the first computing module 306, trigger module 307, the second computing module 308 and the 4th acquisition module 309, wherein:
The first acquisition module 301, for obtaining the predicted position information of described extraterrestrial target.
Described predicted position information comprises the prediction optical position information and corresponding relation constantly of described extraterrestrial target.
Extraterrestrial target, refers to the extraterrestrial target operating on Earth's orbit.Such as the Shenzhou spacecraft, artificial satellite, used rocket and remains, the fragment etc. on Earth's orbit that are retained in launch a man-made satellite..
Can people obtain not the positional information of extraterrestrial target in the same time, also can obtain by the instrument of shooting extraterrestrial target of the prior art.
The first determination module 302, for according to the predicted position information of described extraterrestrial target, determines next area of space that described extraterrestrial target may occur constantly, and described extraterrestrial target is predicted position information in the positional information of described area of space.
Can infer and next area of space that extraterrestrial target may occur constantly according to the extraterrestrial target positional information of having obtained, also can infer the predicted position information that next area of space that extraterrestrial target may occur at it constantly.
The second acquisition module 303, for obtaining described next electronic image of described area of space constantly, and the zero hour and finish time of electronic image described in records photographing.
Because the time of utilizing the instrument of shooting extraterrestrial target to take extraterrestrial target is a period of time, can, using the mean value of the zero hour and the finish time as above-mentioned next moment, can make so follow-up computation process more accurate.
Existing spatial target images in photo, has again the temporal information of taking this photo, i.e. the mean value of the zero hour and the described finish time, i.e. next above-mentioned moment.This repeats at this no longer one by one for prior art.
The 3rd acquisition module 305, for obtaining described extraterrestrial target in the actual position information of described electronic image according to described electronic image.
Electronic image according to next moment extraterrestrial target in reality, can obtain extraterrestrial target in the positional information of area of space.
The first computing module 306, for according to described predicted position information and described actual position information, calculates the optical position departure of described extraterrestrial target.
Because the area of space in electronic photo is exactly the area of space of inferring in step B, thus can be according to extraterrestrial target the relative position information at area of space, calculate optical position departure.
The first determination module 302 to first computing modules 306 repeatedly, to obtain not the optical position departure of extraterrestrial target in the same time.
The second computing module 308, for according to described not extraterrestrial target optical position departure in the same time, calculates the distance correction value of extraterrestrial target and described research station described in current time.
The 4th acquisition module 309, for according to the prediction distance of extraterrestrial target described in described distance correction value and described current time and described research station, obtains the corrected range of extraterrestrial target and described research station described in current time.
Described in described current time, the prediction distance of extraterrestrial target and described research station can obtain in advance, can be described current time Real-time Obtaining, the embodiment of the present invention specifically limit obtaining the time intercropping of the prediction distance of extraterrestrial target and described research station yet.
For example current time be 10: 01: 1 500 milliseconds, calculate the extraterrestrial target of current time and the prediction distance of described research station time can for 10: 01: 1 400 milliseconds, or 10: 01: 1 500 milliseconds.
The embodiment of the present invention provides a kind of device that obtains distance between extraterrestrial target and research station, first the first acquisition module 301 obtains historical data, it is the time, the corresponding relation of the range information of extraterrestrial target optical position information and extraterrestrial target and research station, the first determination module 302 can be inferred and following data constantly by historical data, it is next area of space that extraterrestrial target may occur constantly, then when next arrives constantly, the first computing module 306 can obtain the predicted position information of extraterrestrial target of supposition and the optical position departure of the actual position information of this extraterrestrial target, the second computing module 308 can be according to extraterrestrial target optical position departure in the same time not, infer the distance correction value of the range information that current time extraterrestrial target and research station, thereby the extraterrestrial target that can provide prior forecast and the distance of research station are revised, thereby can calculate accurately the time of opening single-photon detector, make single-photon detector can detect faint echo.
The above-mentioned device embodiment that obtains distance between extraterrestrial target and research station, can also comprise: the 3rd computing module, for according to described corrected range, calculates the opening time of the detector in described research station.
Refer to Fig. 4, the structural representation of a kind of implementation of the second computing module in a kind of device that obtains distance between extraterrestrial target and research station providing for the embodiment of the present invention, this second computing module comprises: the first acquiring unit 401, second acquisition unit 402 and second acquisition unit 403, wherein:
The first acquiring unit 401, for obtain described optical position departure and not in the same time between correspondence relationship information.
Gather not (ti in the same time, Ai, Ei, Δ Ai, Δ Ei) value (at least three groups), wherein, ti specifies i constantly, and Ai, Ei refer to respectively i position angle and the elevation angle constantly, i.e. i optical position information constantly, Δ Ai is the i true bearing angle and the azimuthal departure of prediction of extraterrestrial target constantly, and Δ ei is the i actual elevation angle of extraterrestrial target and the departure at the prediction elevation angle constantly, and i is more than or equal to 1 positive integer.
Optical position departure and not in the same time between correspondence relationship information can be the corresponding relation of (ti, Ai, Ei, Δ Ai, Δ Ei).
Described second acquisition unit specifically for: according to optical position errored message amount anticipation function, and take described not prediction optical position information in the same time, described not in the same time, the described initial condition parameters independent variable that is described optical position errored message amount anticipation function, take described not in the same time optical position departure as the dependent variable of described optical position errored message amount anticipation function, utilize least square method to calculate described initial condition parameters.
Described optical position information comprises the elevation angle and position angle, and described optical position errored message amount anticipation function comprises: the anticipation function of azimuth angle deviation amount anticipation function and elevation deflection amount.Suppose that initial condition parameters is x1, x2 and x3, azimuth angle deviation amount anticipation function can be F1 (ti, Ai, Ei, x1, x2, x3)=Δ Ai, the anticipation function of elevation deflection amount can be F2 (ti, Ai, Ei, x1, x2, x3)=Δ Ei, t=1 wherein, 2, ..., n, x1, x2 and x3 are initial condition parameters.The formula that calculates initial condition parameters is as follows:
F1(ti，Ai，Ei，x1，x2，x3)=ΔAi(t=1,2,...,n)；
F2(ti，Ai，Ei，x1，x2，x3)=ΔEi(t=1,2,...,n)；
In above-mentioned parameter, Δ Ai, Δ Ei, ti, Ai, Ei, be known quantity.In conjunction with least square method, solve above-mentioned simultaneous equations, get final product to obtain the value of initial condition parameters x1, x2 and x3.
The 3rd acquiring unit 403, for the anticipation function according to range deviation, and the independent variable of the anticipation function that the prediction optical position information of described initial condition parameters, described current time, described extraterrestrial target current time of take is described range deviation, calculates the distance correction value of extraterrestrial target and described research station described in described current time.
Due to prediction optical position information and the initial condition parameters of known above-mentioned current time, described extraterrestrial target current time, bring these parameters into first function, can obtain the optical position departure of described extraterrestrial target.
The anticipation function of supposing range deviation is Δ R=F3 (t, A, E, x1, x2, x3), wherein Δ R is distance correction value to be asked, and F3 is the anticipation function of range deviation, and t is current time, A, E be respectively current time extraterrestrial target prediction position angle, prediction the elevation angle, predict optical position information.Wherein, t, A, E, x1, x2 and x3 are known quantities, and substitution function F 3 can be calculated distance correction value Δ R.
It should be noted that, each embodiment in this instructions all adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.For device or system class embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
Also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in the storage medium of any other form known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a method of obtaining distance between extraterrestrial target and research station, is characterized in that, comprising:
A, obtain the predicted position information of described extraterrestrial target, described predicted position information comprises the prediction optical position information and corresponding relation constantly of described extraterrestrial target;
B, according to the predicted position information of described extraterrestrial target, determine next area of space that constantly described extraterrestrial target may occur, described extraterrestrial target is predicted position information in the positional information of described area of space;
C, obtain described next electronic image of described area of space constantly, and the zero hour and finish time of electronic image described in records photographing;
D, the time of exposure using the mean value of the described zero hour and the described finish time as described electronic image, and will be superimposed upon the described time of exposure in described electronic image;
E, according to described electronic image, obtain described extraterrestrial target in the actual position information of described electronic image;
F, according to described predicted position information and described actual position information, calculate the optical position departure of described extraterrestrial target;
I, repeating step B be to step F, obtains not the optical position departure of described extraterrestrial target in the same time;
G, according to described not extraterrestrial target optical position departure in the same time, calculate the distance correction value of extraterrestrial target and described research station described in current time;
H, according to the prediction distance of extraterrestrial target described in described distance correction value and described current time and described research station, obtain the corrected range of extraterrestrial target and described research station described in current time.
2. method according to claim 1, is characterized in that, after step H, described method also comprises:
K, according to described corrected range, calculate the opening time of the detector in described research station.
3. method according to claim 1, is characterized in that, described step G comprises:
I1, obtain described optical position departure and not in the same time between correspondence relationship information;
I2, obtain initial condition parameters;
I3, according to the anticipation function of range deviation, and the independent variable of the anticipation function that the prediction optical position information of described initial condition parameters, described current time, described extraterrestrial target current time of take is described range deviation, calculates the distance correction value of extraterrestrial target and described research station described in described current time.
4. method according to claim 3, is characterized in that, described step I2 specifically comprises:
According to optical position errored message amount anticipation function, and take described not prediction optical position information in the same time, described not in the same time, the described initial condition parameters independent variable that is described optical position errored message amount anticipation function, take described not in the same time optical position departure as the dependent variable of described optical position errored message amount anticipation function, utilize least square method to calculate described initial condition parameters.
5. method according to claim 3, is characterized in that, described optical position information comprises the elevation angle and position angle, and described optical position errored message amount anticipation function comprises: the anticipation function of azimuth angle deviation amount anticipation function and elevation deflection amount.
6. a device that obtains distance between extraterrestrial target and research station, is characterized in that, comprising:
The first acquisition module, for obtaining the predicted position information of described extraterrestrial target, described predicted position information comprises the prediction optical position information and corresponding relation constantly of described extraterrestrial target;
The first determination module, for according to the predicted position information of described extraterrestrial target, determines next area of space that described extraterrestrial target may occur constantly, and described extraterrestrial target is predicted position information in the positional information of described area of space;
The second acquisition module, for obtaining described next electronic image of described area of space constantly, and the zero hour and finish time of electronic image described in records photographing;
Laminating module, for the time of exposure using the mean value of the described zero hour and the described finish time as described electronic image, and will be superimposed upon in described electronic image the described time of exposure;
The 3rd acquisition module, for obtaining described extraterrestrial target in the actual position information of described electronic image according to described electronic image;
The first computing module, for according to described predicted position information and described actual position information, calculates the optical position departure of described extraterrestrial target;
Trigger module, for triggering described the first determination module, to obtain not the optical position departure of described extraterrestrial target in the same time;
The second computing module, for according to described not extraterrestrial target optical position departure in the same time, calculates the distance correction value of extraterrestrial target and described research station described in current time;
The 4th acquisition module, for according to the prediction distance of extraterrestrial target described in described distance correction value and described current time and described research station, obtains the corrected range of extraterrestrial target and described research station described in current time.
7. obtain according to claim 6 the device of distance between extraterrestrial target and research station, it is characterized in that, also comprise:
The 3rd computing module, for according to described corrected range, calculates the opening time of the detector in described research station.
8. obtain according to claim 6 the device of distance between extraterrestrial target and research station, it is characterized in that, described the second computing module comprises:
The first acquiring unit, for obtain described optical position departure and not in the same time between correspondence relationship information;
Second acquisition unit, for obtaining initial condition parameters;
The 3rd acquiring unit, for the anticipation function according to range deviation, and the independent variable of the anticipation function that the prediction optical position information of described initial condition parameters, described current time, described extraterrestrial target current time of take is described range deviation, calculates the distance correction value of extraterrestrial target and described research station described in described current time.
9. obtain according to claim 8 the device of distance between extraterrestrial target and research station, it is characterized in that, described second acquisition unit specifically for: according to optical position errored message amount anticipation function, and take described not prediction optical position information in the same time, described not in the same time, the described initial condition parameters independent variable that is described optical position errored message amount anticipation function, take described not in the same time optical position departure as the dependent variable of described optical position errored message amount anticipation function, utilize least square method to calculate described initial condition parameters.
10. obtain according to claim 9 the device of distance between extraterrestrial target and research station, it is characterized in that, described optical position information comprises the elevation angle and position angle, and described optical position errored message amount anticipation function comprises: the anticipation function of azimuth angle deviation amount anticipation function and elevation deflection amount.
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