CN106918826B - A kind of calibration range-measurement system of interferometric radiometer, calibration and H_2O maser method - Google Patents
A kind of calibration range-measurement system of interferometric radiometer, calibration and H_2O maser method Download PDFInfo
- Publication number
- CN106918826B CN106918826B CN201710085866.0A CN201710085866A CN106918826B CN 106918826 B CN106918826 B CN 106918826B CN 201710085866 A CN201710085866 A CN 201710085866A CN 106918826 B CN106918826 B CN 106918826B
- Authority
- CN
- China
- Prior art keywords
- signal
- subsystem
- maser
- rate
- frequency
- 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.)
- Active
Links
Classifications
-
- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/428—Determining position using multipath or indirect path propagation signals in position determination
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Signal Processing (AREA)
- Radiation Pyrometers (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The present invention provides a kind of calibration range-measurement systems of interferometric radiometer, the system comprises N number of subsystems, it is respectively placed on N satellite, each subsystem includes: antenna element, receiver unit, signal generator, signal processing and control unit and switching switch；The antenna element is for receiving/emitting rate-aided signal and H_2O maser signal；The receiver unit is for receiving rate-aided signal and H_2O maser signal；The signal generator is for generating rate-aided signal and H_2O maser signal；The signal that the signal processing is used to generate signal generator with control unit controls, and handles the calibration received/H_2O maser signal；The switching switch switches between normal observation mode, signal calibration mode and H_2O maser mode for realizing system.Based on above system, the present invention also provides a kind of calibrating methods of interferometric radiometer and H_2O maser method.
Description
Technical field
The present invention relates to interferometric radiometer field, in particular to the calibration range-measurement system of a kind of interferometric radiometer, calibration and
H_2O maser method.
Background technique
The passive radio imaging technique research of interference formula starts from 1890, and Michelson has been carried out micro- using separate antenna
Wave interference experiment；Nineteen forty-six, Ryle and Vonberg utilize binary radio interferometer, have carried out sun observation；1962, Ryle
It is further proposed that more baseline coverings are realized, thus the method for improving interference imaging quality using earth rotation；1967, ground
Base very long baseline interferometer (VLBI) comes into operation；The U.S. in 1986 using stationary orbit communications satellite TDRSS with having carried out star
Radio interference experiment；1997, Japan's transmitting HALCA satellite, with the having carried out star interference experiment on elliptic orbit；2009,
European Space Agency transmits SMOS satellite, and Main Load is the interference type micro-wave radiometer of Y type array layout.In recent years, both at home and abroad
Scholar proposes the spatially distributed interferometric radiometer based on satellites formation one after another, realizes that cubical array is distributed using satellites formation,
It improves longest baseline and then improves spatial resolution.
Interferometric radiometer is a kind of passive remote sensing device, is mainly used in the skills such as earth observation, cosmic background, space astronomy
Art field.Radiometer identifies the physical characteristic of target to realize by receiving the natural radiation signal from target.
However, since natural radiation signal is very faint, the minor change of receiver noise temperature itself and gain will be seriously affected
The measurement accuracy of radiometer, therefore nearly all radiometer requires to design special scaling system and calibrating method, realization pair
The calibration of receiver noise temperature and change in gain.
Different from conventional radiation meter, by more receiving channels, (the secondary observation antenna+1 in 1 receiving channel=1 covers interferometric radiometer
Receiver) composition system, two received information of antenna are multiplied and are integrated again using cross-correlator, thus obtain can
Degree of opinion function.Different from conventional radiation meter, interferometric radiometer not only needs to pay close attention to the gain of receiving channel, also needs to understand reception
The phase in channel, in addition the consistency of interchannel also has a great impact to the measurement accuracy of interferometric radiometer；Therefore, interfere spoke
Penetrate the gain counted not only need to receiving channel, phase is demarcated, it is also necessary to the phase between the consistency and antenna of interchannel
Position is demarcated.
For conventional interference radiometer, relative position is fixed between array antenna, and antenna spacing is usually meter level.Cause
This, generallys use the methods of two-point calibration, uncorrelated noise injection, correlated noise injection to gain error, phase error and leads to
Inconsistency is corrected between road；In addition, due to antenna relative position be it is fixed, installation error can by measured data into
Row compensation, location error caused by remaining aging is usually very small, will not generate and significantly affect to measurement result.
And for distributed interferometric radiometer, each receiving channel is placed on a microsatellite, and interstellar distance is usually
Km magnitude；Mutual coupling can be ignored between star, however, traditional noise injection method is also no longer feasible.In addition, more in order to obtain
Baseline covering, need to change interstellar distance by external force；Time synchronization is closely bound up between the measurement accuracy and star of interstellar distance,
Interstellar distance indeterminacy can introduce baseline length error, to influence interferometric radiometer imaging results and/or positioning accuracy.
Summary of the invention
It is an object of the invention to overcome the above problem existing for current interferometric radiometer, a kind of interferometric radiometer is proposed
Calibration range-measurement system, calibration and H_2O maser method, interferometric radiometer can be calibrated, and complete the survey of interstellar distance
Amount.
To achieve the goals above, the present invention provides a kind of calibration range-measurement system of interferometric radiometer, the system packets
N number of subsystem is included, is respectively placed on N satellite, each subsystem includes: antenna element, receiver unit, signal generation
Device, signal processing and control unit and switching switch；The antenna element is for receiving/emitting rate-aided signal and H_2O maser letter
Number；The receiver unit is for receiving rate-aided signal and H_2O maser signal；The signal generator is for generating calibration letter
Number and H_2O maser signal；The signal that the signal processing is used to generate signal generator with control unit controls, and
The calibration received/H_2O maser signal is handled；The switching switch is for realizing system in normal observation mode, letter
It number is switched between calibration mode and H_2O maser mode.
In above-mentioned technical proposal, when subsystem is in normal observation mode, at antenna element, receiver unit and signal
Reason is sequentially connected with control unit；When subsystem is in signal calibration mode, signal processing and control unit, signal occur
Device, receiver unit and signal processing and control unit are sequentially connected；When subsystem is in H_2O maser mode, if the son
System is signal launch party, then signal processing is sequentially connected with control unit, signal generator and antenna element；If the subsystem
System is receiving side signal, then antenna element, receiver unit and signal processing and control unit are sequentially connected.
Based on above system, the present invention also provides a kind of calibrating methods of interferometric radiometer, which comprises
Step S1) signal generator of subsystem on each satellite generates the calibration for realizing interchannel Concordance
Signal；
Step S2) rate-aided signal on each satellite arriving signal processing and control unit, signal after receiver unit
Processing and control unit rate-aided signal is sampled, frequency conversion, I/Q detection and number be filtered, obtain calibration data；
Step S3) pass the calibration data of subsystem that step S2) processing obtains back ground, it is mutually different to carry out interchannel width
Cause property compares, and obtains the amplitude factor and phase factor of the calibration data of each subsystem, for receiving under normal observation mode
To data be corrected, complete calibration.
In above-mentioned technical proposal, the step S1) specific implementation process are as follows:
For single-frequency interferometric radiometer, rate-aided signal is single-frequency；Assuming that the working frequency of single-frequency interferometric radiometer is f,
When carrying out signal calibration, the rate-aided signal v of signal generator generation in each satellite upscaling range-measurement systemcalAre as follows:
Wherein, AcalFor the amplitude of rate-aided signal,For the initial phase of rate-aided signal；
It is assumed that the working frequency of multifrequency interferometric radiometer is fi, i=1,2 ... M, M are the number of frequency, need to be to M frequency
Interchannel inconsistency demarcated respectively, on each satellite in subsystem signal generator generation be both needed to generate different frequencies respectively
The rate-aided signal of point, specific as follows:
In formula: vCal, iIndicate frequency fiRate-aided signal, ACal, iFor frequency fiRate-aided signal amplitude,For frequency
fiRate-aided signal initial phase, the switching control of rate-aided signal frequency carrys out reality by the signal processing and control unit of subsystem
It is existing.
In above-mentioned technical proposal, the step S3) it specifically includes:
Step S3-1) calibration data that each subsystem returns in calibration range-measurement system are obtained, extract the calibration of each subsystem
The amplitude information and phase information of data, amplitude and phase are respectively AkWithK=1 ... N；
Since the magnitude-phase characteristics in channel has differences, after identical rate-aided signal input, each channel output calibration letter
It number will be different:
In formula: vkFor the rate-aided signal of k-th of channel output；
Step S3-2) on the basis of first subsystem, obtain the amplitude factor and phase factor of each subsystem:
Step S3-3) each subsystem under normal observation mode is received using obtained amplitude factor and phase factor
Signal carries out amplitude correction and phasing:
Under normal observation mode, it is assumed that the signal that subsystem k is received isWherein Ar,kWithPoint
The amplitude and phase of signal Wei not received；Reception signal after correction becomes:
Based on above system, the present invention also provides a kind of H_2O maser methods, which comprises
Step T1) signal generator of calibration range-measurement system on satellite A generates H_2O maser signal；
Distance measuring signal is designed as two-frequency signal:
wk=Ak[cos(2πf1t)+cos(2πf2t)] (7)
In formula: wkFor H_2O maser signal, AkFor the amplitude of H_2O maser signal, f1And f2It is the two of dual-frequency ranging signal
A frequency, frequency f1And f2It cannot be multiple proportion；The initial phase of dual-frequency ranging signal is designed as 0；
Step T2) antenna element of calibration range-measurement system on satellite A sends H_2O maser signal, the calibration on satellite B
The receiver unit of range-measurement system receives H_2O maser signal；
Step T3) calibration range-measurement system on satellite B signal processing and control unit to H_2O maser signal at
Reason completes H_2O maser.
In above-mentioned technical proposal, the step T3) specific implementation process are as follows:
It is assumed that the initial value of the interstellar distance of satellite A and satellite B is R, error is Δ R, two differences that satellite B is received
The phase of frequency signal is respectivelyThen have:
Wherein, c is the light velocity；Δ R can be calculated in joint (8) formula and (9) formula, to obtain the interstellar distance of satellite A and B
For R+ Δ R.
Present invention has an advantage that
Calibration range-measurement system, calibration and the H_2O maser method of interferometric radiometer provided by the invention, can be realized distribution
The interchannel Concordance of formula interferometric radiometer, while H_2O maser precision is improved, improve the property of distributed interferometric radiometer
Energy.
Detailed description of the invention
The schematic diagram of the subsystem of the calibration range-measurement system of interferometric radiometer Fig. 1 of the invention；
Fig. 2 is the flow chart of the calibrating method of interferometric radiometer of the invention；
Fig. 3 is the flow chart that calibration data of the invention are handled；
Fig. 4 is each channel amplitude inconsistency of the invention and the flow chart that Sensor gain and phase perturbations correct；
Fig. 5 is the flow chart of H_2O maser method of the invention.
Specific embodiment
The present invention will be further described in detail in the following with reference to the drawings and specific embodiments.
A kind of calibration range-measurement system of interferometric radiometer, the system comprises N number of subsystems, are respectively placed in N satellite
On；As shown in Figure 1, each subsystem includes: antenna element, receiver unit, signal generator, signal processing and control unit
It is switched with switching；The antenna element is for receiving/emitting rate-aided signal and H_2O maser signal；The receiver unit is used for
Receive rate-aided signal and H_2O maser signal；The signal generator is for generating rate-aided signal and H_2O maser signal；It is described
The signal that signal processing is used to generate signal generator with control unit controls, and surveys between the calibration/star received
It is handled away from signal；The switching switch is for realizing system in normal observation mode, signal calibration mode and H_2O maser
It is switched between mode.
When subsystem is in normal observation mode, antenna element, receiver unit and signal processing and control unit according to
It is secondary to be connected；When subsystem is in signal calibration mode, signal processing and control unit, signal generator, receiver unit and
Signal processing is sequentially connected with control unit；When subsystem is in H_2O maser mode, if the subsystem is signal transmitting
Side, then signal processing is sequentially connected with control unit, signal generator and antenna element；If the subsystem is signal reception
Side, then antenna element, receiver unit and signal processing and control unit are sequentially connected.
As shown in Fig. 2, being based on above system, the present invention also provides a kind of calibrating method of interferometric radiometer, the side
Method includes:
Step S1) signal generator of subsystem on each satellite generates the calibration for realizing interchannel Concordance
Signal；
The corresponding channel of each antenna of antenna element, when carrying out interchannel Concordance, it is desirable that each channel
Rate-aided signal design is consistent: identical frequency, identical signal form (including amplitude and phase).
The magnitude-phase characteristics in different frequency channel will be different, and therefore, the frequency of rate-aided signal needs dry according to distribution
The working frequency of radiometer system is related to be configured.For single-frequency interferometric radiometer, rate-aided signal is single-frequency；Assuming that single-frequency
The working frequency of interferometric radiometer is f, then rate-aided signal vcalAre as follows:
Wherein, AcalFor the amplitude of rate-aided signal,For the initial phase of rate-aided signal；
For multifrequency interferometric radiometer, then need to be corrected using passage consistency of the sweep method to each frequency point.It is false
The working frequency for determining multifrequency interferometric radiometer is fi(i=1,2 ... M, M are the number of frequency), it is each logical when carrying out signal calibration
The rate-aided signal in road is equal are as follows:
In formula: vCal, iIndicate frequency fiRate-aided signal, ACal, iFor frequency fiRate-aided signal amplitude,For frequency
fiRate-aided signal initial phase, the switching control of rate-aided signal frequency carrys out reality by the signal processing and control unit of system
It is existing.
Step S2) rate-aided signal on each satellite arriving signal processing and control unit, signal after receiver unit
Processing and control unit rate-aided signal is sampled, frequency conversion, I/Q detection and number be filtered, obtain calibration data；
Step S3) pass the calibration data of subsystem that step S2) processing obtains back ground, it is mutually different to carry out interchannel width
Cause property compares, and obtains the amplitude factor and phase factor of the calibration data of each subsystem, for receiving under normal observation mode
To data be corrected, complete calibration.
Either single-frequency interferometric radiometer or multifrequency interferometric radiometer, calibration data processing method be it is the same, under
Face carries out calibration data processing method explanation by taking single-frequency interferometric radiometer as an example, as shown in figure 3, the step S3) it specifically includes:
Step S3-1) calibration data that each subsystem returns in calibration range-measurement system are obtained, extract the calibration of each subsystem
The amplitude information and phase information of data, amplitude and phase are respectively AkWithK=1 ... N；
Since the magnitude-phase characteristics in channel has differences, after identical rate-aided signal input, each channel output calibration letter
It number will be different:
In formula: vkFor the rate-aided signal of k-th of channel output；
Step S3-2) on the basis of first subsystem, obtain the amplitude factor and phase factor of each subsystem:
Step S3-3) each subsystem under normal observation mode is received using obtained amplitude factor and phase factor
Signal carries out amplitude correction and phasing:
As shown in figure 4, under normal observation mode, it is assumed that the signal that subsystem k is received isWherein
Ar,kWithRespectively receive the amplitude and phase of signal；Enable the amplitude for receiving signal divided by amplitude factor Δ Ak, realize width
Spend nonuniformity correction；Its phase is enabled to subtract phase factorRealize Sensor gain and phase perturbations correction.Utilize amplitude factor and phase
Reception signal after location factor is corrected becomes:
Based on above system, the present invention also provides a kind of H_2O maser methods, which comprises
During H_2O maser, by the way of " multicast ", i.e. a star emits distance measuring signal, other more stars receive
Distance measuring signal.It is as shown in Figure 5 to receive treatment process.
Step T1) signal generator of subsystem on satellite A generates H_2O maser signal；
H_2O maser principle: emit dual-frequency ranging signal, another antenna using the one of antenna element for constituting baseline
Unit is received, and the length of baseline is determined according to the phase of the different frequency signals received.
The application of this distance measuring method on condition that: preliminary surveying is carried out to interstellar distance/baseline length by other means, and
Measurement error is not more than a wavelength.The case where being greater than a wavelength for range error, H_2O maser precision can be deteriorated.
H_2O maser method is illustrated by taking two stars as an example below.It is assumed that measuring interstellar distance in t0 moment inter-satellite link is R
(t0), consider the presence of time synchronization error Δ t, measuring the error between distance R (t0) and actual distance R0 is Δ R, wherein
Δ R=c Δ t, c are the light velocity.
The H_2O maser signal frequency of satellite A transmitting is f1, H_2O maser signal phase that the channel 1 of satellite B receives
ForThe H_2O maser signal frequency of satellite A transmitting is f2When, the phase that the channel 2 of satellite B receives signal isIn addition,
Since 2 π of phase are periodical, the phase measured is fuzzy with 2 π periods, that is, the relationship between phase and distance measured is as follows:
In above formula, c is the light velocity, n1And n2Respectively phaseWithInteger ambiguity.It is assumed that range error is not more than one
A wavelength, then have
From principle, (5) and (6) formula of utilization can be accurately obtained phaseAnd integer ambiguity n1、n2, to obtain
Obtain accurate interstellar distance.
Distance measuring signal is designed as double based on H_2O maser principle in order to avoid the influence of interchannel clock synchronous error
Frequency signal:
wk=Ak[cos(2πf1t)+cos(2πf2t)] (7)
In formula: wkFor H_2O maser signal, AkFor the amplitude of H_2O maser signal, f1And f2It is the two of dual-frequency ranging signal
A frequency, frequency f1And f2It cannot be multiple proportion.In addition, in order to avoid two single-frequency frequency signals initial phase not really
Qualitative, the initial phase of dual-frequency ranging signal is designed as 0.
Step T2) antenna element of subsystem on satellite A sends H_2O maser signal, the calibration ranging system on satellite B
The receiver unit of system receives H_2O maser signal；
Step T3) subsystem on satellite B signal processing and control unit H_2O maser signal is handled, complete
H_2O maser；
It is assumed that the initial value of the interstellar distance of satellite A and satellite B is R, error is Δ R, two differences that satellite B is received
The phase of frequency signal is respectivelyThen (5) formula and (6) formula become:
Wherein, c is the light velocity；Δ R can be calculated in joint (8) formula and (9) formula, to obtain the interstellar distance of satellite A and B
For R+ Δ R.
Claims (6)
1. a kind of calibration range-measurement system of interferometric radiometer, the system comprises N number of subsystems, it is respectively placed on N satellite,
It is characterized in that, each subsystem include: antenna element, receiver unit, signal generator, signal processing and control unit and
Switching switch；The antenna element is for receiving/emitting rate-aided signal and H_2O maser signal；The receiver unit is for connecing
Receive rate-aided signal and H_2O maser signal；The signal generator is for generating rate-aided signal and H_2O maser signal；The letter
Number processing is controlled with control unit for the signal that generates to signal generator, and to the calibration/H_2O maser received
Signal is handled；
The switching switch carries out between normal observation mode, signal calibration mode and H_2O maser mode for realizing system
Switching subsystem is when being in normal observation mode, antenna element, receiver unit and signal processing and control unit successively phase
Even；When subsystem is in signal calibration mode, signal processing and control unit, signal generator, receiver unit and signal
Processing is sequentially connected with control unit；When subsystem is in H_2O maser mode, if the system is signal launch party, believe
Number processing is sequentially connected with control unit, signal generator and antenna element；If the subsystem is receiving side signal, antenna
Unit, receiver unit and signal processing and control unit are sequentially connected.
2. a kind of calibrating method of interferometric radiometer is realized based on system described in claim 1, which comprises
Step S1) signal generator of subsystem on each satellite generates and believes for realizing the calibration of interchannel Concordance
Number；
Step S2) each subsystem rate-aided signal after receiver unit arriving signal processing and control unit, signal processing
Rate-aided signal is sampled with control unit, frequency conversion, I/Q detection and number filtering processing, obtain calibration data；
Step S3) pass the calibration data of the obtained subsystem of step S2) back ground, carry out interchannel sensor gain and phase uncertainties ratio
Compared with the amplitude factor and phase factor of the calibration data of each subsystem being obtained, for the number received under normal observation mode
According to being corrected, calibration is completed.
3. the calibrating method of interferometric radiometer according to claim 2, which is characterized in that the step S1) specific reality
Existing process are as follows:
For single-frequency interferometric radiometer, rate-aided signal is single-frequency；Assuming that the working frequency of single-frequency interferometric radiometer is f, carry out
When signal is calibrated, the rate-aided signal v of signal generator generation in each satellite upscaling range-measurement systemcalAre as follows:
Wherein, AcalFor the amplitude of rate-aided signal,For the initial phase of rate-aided signal；
It is assumed that the working frequency of multifrequency interferometric radiometer is fi, i=1,2 ... M, M are the number of frequency, need to be led to M frequency
Inconsistency is demarcated respectively between road, and signal generator generation is both needed to generate different frequent points respectively in subsystem on each satellite
Rate-aided signal, specific as follows:
In formula: vcal,iIndicate frequency fiRate-aided signal, Acal,iFor frequency fiRate-aided signal amplitude,For frequency fi's
The switching control of the initial phase of rate-aided signal, rate-aided signal frequency is realized by the signal processing of subsystem with control unit.
4. the calibrating method of interferometric radiometer according to claim 2, which is characterized in that the step S3) it specifically includes:
Step S3-1) calibration data that each subsystem returns in calibration range-measurement system are obtained, extract the calibration data of each subsystem
Amplitude information and phase information, amplitude and phase be respectively AkWith
Since the magnitude-phase characteristics in channel has differences, after identical rate-aided signal input, each channel exports rate-aided signal meeting
It is different:
In formula: vkFor the rate-aided signal of k-th of channel output；
Step S3-2) on the basis of first subsystem, obtain the amplitude factor and phase factor of each subsystem:
Step S3-3) each subsystem under normal observation mode is received using obtained amplitude factor and phase factor signal
Carry out amplitude correction and phasing:
Under normal observation mode, it is assumed that the signal that subsystem k is received isWherein Ar,kWithRespectively connect
Receive the amplitude and phase of signal；Reception signal after correction becomes:
5. a kind of H_2O maser method is realized based on system described in claim 1, which comprises
Step T1) signal generator of subsystem on satellite A generates H_2O maser signal；
Distance measuring signal is designed as two-frequency signal:
wk=Ak[cos(2πf1 t)+cos(2πf2 t)] (7)
In formula: wkFor H_2O maser signal, AkFor the amplitude of H_2O maser signal, f1And f2For two frequencies of dual-frequency ranging signal
Rate, frequency f1And f2It cannot be multiple proportion；The initial phase of dual-frequency ranging signal is 0；
Step T2) antenna element of subsystem on satellite A sends H_2O maser signal, the receiver of the subsystem on satellite B
Unit receives H_2O maser signal；
Step T3) subsystem on satellite B signal processing and control unit H_2O maser signal is handled, complete between star
Ranging.
6. H_2O maser method according to claim 5, which is characterized in that the step T3) specific implementation process are as follows:
It is assumed that the initial value of the interstellar distance of satellite A and satellite B is R, error is Δ R, two different frequencies that satellite B is received
The phase of signal is respectivelyThen have:
Wherein, c is the light velocity；Δ R can be calculated in joint (8) formula and (9) formula, so that the interstellar distance for obtaining satellite A and B is R+
ΔR。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710085866.0A CN106918826B (en) | 2017-02-17 | 2017-02-17 | A kind of calibration range-measurement system of interferometric radiometer, calibration and H_2O maser method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710085866.0A CN106918826B (en) | 2017-02-17 | 2017-02-17 | A kind of calibration range-measurement system of interferometric radiometer, calibration and H_2O maser method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106918826A CN106918826A (en) | 2017-07-04 |
| CN106918826B true CN106918826B (en) | 2019-05-17 |
Family
ID=59454675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710085866.0A Active CN106918826B (en) | 2017-02-17 | 2017-02-17 | A kind of calibration range-measurement system of interferometric radiometer, calibration and H_2O maser method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106918826B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109828249A (en) * | 2019-02-22 | 2019-05-31 | 北京遥感设备研究所 | A kind of calibrating method for synthetic aperture radiometer array |
| CN113030596B (en) * | 2021-04-19 | 2022-05-31 | 山东大学 | Solar radio observation instrument, system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1426130A (en) * | 2001-12-12 | 2003-06-25 | 中国科学院空间科学与应用研究中心 | Satellite carried rotary scanning interference type imaging microwave radiation meter |
| CN101876699A (en) * | 2009-04-30 | 2010-11-03 | 中国科学院空间科学与应用研究中心 | Control system and control method of satellite-borne microwave radiometer |
| CN103675774A (en) * | 2013-11-29 | 2014-03-26 | 西安空间无线电技术研究所 | Method for externally calibrating satellite-borne microwave scatterometers |
| CN104502887A (en) * | 2014-12-25 | 2015-04-08 | 湖南航天电子科技有限公司 | Satellite orientation based azimuth calibration method and device |
| CN104793061A (en) * | 2015-04-28 | 2015-07-22 | 中国科学院空间科学与应用研究中心 | Spaceborne interferometic microwave radiometer and calibration method thereof |
-
2017
- 2017-02-17 CN CN201710085866.0A patent/CN106918826B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1426130A (en) * | 2001-12-12 | 2003-06-25 | 中国科学院空间科学与应用研究中心 | Satellite carried rotary scanning interference type imaging microwave radiation meter |
| CN101876699A (en) * | 2009-04-30 | 2010-11-03 | 中国科学院空间科学与应用研究中心 | Control system and control method of satellite-borne microwave radiometer |
| CN103675774A (en) * | 2013-11-29 | 2014-03-26 | 西安空间无线电技术研究所 | Method for externally calibrating satellite-borne microwave scatterometers |
| CN104502887A (en) * | 2014-12-25 | 2015-04-08 | 湖南航天电子科技有限公司 | Satellite orientation based azimuth calibration method and device |
| CN104793061A (en) * | 2015-04-28 | 2015-07-22 | 中国科学院空间科学与应用研究中心 | Spaceborne interferometic microwave radiometer and calibration method thereof |
Non-Patent Citations (2)
| Title |
|---|
| FPIR: Consideration for a new calibration system;Lin Wu etal.;《2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)》;20160715;第434-436页 * |
| 干涉数据中非线性的校正及其对辐射定标的影响;杨敏珠 等;《中国激光》;20170131;第44卷(第1期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106918826A (en) | 2017-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10663563B2 (en) | On-site calibration of array antenna systems | |
| CN101980048B (en) | Antenna array forming technology-based ground-based radar system for space debris | |
| CN104137447B (en) | Estimate the method and system of the echo signal progressive error of spacecraft or vehicle launch | |
| CN102032949B (en) | External calibration device of geosynchronous orbit atmospheric temperature detecting instrument and external calibration method thereof | |
| CN107300561B (en) | Ocean salinity satellite based on multi-remote-sensor joint detection | |
| US4996533A (en) | Single station radar ocean surface current mapper | |
| CN105738851B (en) | A kind of synthetic aperture microwave radiometer joint bearing calibration | |
| CN104166141A (en) | Method for designing multiple-input-multiple-output synthetic aperture radar system on basis of sub-band synthesis | |
| Domnin et al. | Kharkiv incoherent scatter facility | |
| CN109633578B (en) | Two-channel high-precision phase calibration system and method | |
| CN108303602B (en) | Test method for receiving and transmitting beam pattern of ultra-sparse antenna array | |
| CN106918826B (en) | A kind of calibration range-measurement system of interferometric radiometer, calibration and H_2O maser method | |
| CN103792535A (en) | Method for measuring TEC value of ionized layer by utilizing SAR satellite | |
| CN103257340B (en) | Method for calibrating amplitude consistency of a plurality of ground receivers with radar satellite | |
| US6130644A (en) | Method and apparatus for geodetic surveying and/or earth imaging by satellite signal processing | |
| Kiefner et al. | Holographic calibration of phased array telescopes | |
| CN201600451U (en) | External calibrating device of atmosphere temperature detecting device with interference type aperture synthesis technology | |
| Wijnholds et al. | UAV-aided calibration for commissioning of phased array radio telescopes | |
| US3028600A (en) | Radio direction finding system | |
| CN110456317A (en) | A kind of phased array radar system calibrating method based on meteor trail echo | |
| CN109828232A (en) | A kind of array antenna angle measurement fuzzy believable degree computing device and method | |
| CN107390296A (en) | A kind of quick calibrating method for passive synthetic aperture imager system | |
| RU2309425C2 (en) | Method of forming calibration data for radio direction finder/ range finder (versions) | |
| EP4010722A1 (en) | Angle information estimation of ultra-wideband wireless signals | |
| US20220303646A1 (en) | Displacement measurement systems and methods with simultaneous transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |