CN110018455A - Amplitude-phase consistency error calibrates measurement method between Space-borne SAR Imaging receiving channel - Google Patents
Amplitude-phase consistency error calibrates measurement method between Space-borne SAR Imaging receiving channel Download PDFInfo
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- CN110018455A CN110018455A CN201910290379.7A CN201910290379A CN110018455A CN 110018455 A CN110018455 A CN 110018455A CN 201910290379 A CN201910290379 A CN 201910290379A CN 110018455 A CN110018455 A CN 110018455A
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- G—PHYSICS
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- 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
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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Abstract
The present invention relates to amplitude-phase consistency errors between a kind of Space-borne SAR Imaging receiving channel of Space-borne SAR Imaging technical field to calibrate measurement method: (1) SAR system working condition and parameter setting, including signal bandwidth of operation and pulsewidth, operating mode, single machine master backup state, PRF value and booting duration；(2) SAR system booting is realized according to working state of system and parameter setting values establishment and upper note instruction packet, while records echo data；(3) echo data of record is formatted and pulse pressure is handled, amplitude and phase compare and analyze at peak value after extraction pulse pressure；(4) the imaging receiver channel amplitude-phase consistency error measure under step 1 and step 3 completion different bandwidth, different master backup states is repeated, the method of the present invention can complete the measurement of imaging receiver interchannel amplitude-phase consistency error under conditions of without the measurement of microwave dark room near-field scan, while repeatedly can quickly and easily carry out the monitoring of imaging receiver interchannel amplitude-phase consistency error.
Description
Technical field
The present invention relates to Space-borne SAR Imaging technical fields, and in particular, to width between a kind of Space-borne SAR Imaging receiving channel
Consistent property error calibrates measurement method.
Background technique
Between Space-borne SAR Imaging receiving channel amplitude-phase consistency error measurement method first is that under microwave dark room environment, benefit
Amplitude-phase consistency error measure is carried out with near-field scan frame, this method feature, which is that precision is high, entire receive can be completely covered, leads to
Road link, but due to its measuring condition (including test equipment and place) require it is high, and be not it is particularly flexible, can not be any
The measurement of amplitude-phase consistency error result and monitoring are carried out at any time under moment and any place.
Between Space-borne SAR Imaging receiving channel amplitude-phase consistency error measurement method first is that by list T/R receive calibrate
Operating mode timesharing carries out each T/R receiving channel width phase data and obtains, then point by each channel T/R in imaging receiver channel
Cloth relationship receives calibration echo data to each T/R and carries out synthesis superposition in data field, carries out matched filtering to superimposed data
Pulse pressure processing, then amplitude and phase progress maximum value and minimum value at each peak value is taken to make the difference.The characteristics of this method is to require simply,
Belong to timesharing measurement without the non-delayed reception calibration mode of the full front of systemic software development, but since single T/R receives calibration work,
It cannot complete to represent normal full front receipts working condition.
As the requirement of the continuous development of Synthetic Aperture Radar satellite, especially high-resolution and wide covering is higher and higher,
More receiving channel imaging bodies are made for a main trend of the following satellite-borne SAR application, while as what image quality required constantly mentions
Height, to the control of interchannel amplitude-phase consistency error, more stringent requirements are proposed.For this purpose, first is that needing strict control imaging receiver
It is horizontal to improve imaging receiver interchannel amplitude-phase consistency for interchannel amplitude-phase consistency error；Second is that needing to be efficiently completed imaging
The measurement and monitoring of amplitude-phase consistency level between receiving channel.It is continuous with Spaceborne SAR System design level and R&D capability
It improves, radar receiver and data shaper have individual reception, acquisition, coding and fusion each imaging receiver channel echo at present
The ability of data, amplitude-phase consistency error efficiently calibrates measurement and provides condition between Space-borne SAR Imaging receiving channel.
Summary of the invention
In view of the drawbacks of the prior art, the object of the present invention is to provide width phases one between a kind of Space-borne SAR Imaging receiving channel
Cause property error calibrates measurement method, the technical solution adopted by the present invention is that the individual reception based on imaging receiver channel echo data
And acquisition, by taking the non-delayed reception calibration work mode of full front to enroll calibration data, then to each imaging receiver channel
It receives calibration echo data and carries out pulse pressure processing, amplitude-phase consistency misses between realizing high-efficiency high-accuracy Space-borne SAR Imaging receiving channel
Difference calibration measurement.It realizes the measurement and monitoring between amplitude-phase consistency error Space-borne SAR Imaging receiving channel, while improving survey
Accuracy of measurement and the simplicity for meeting realization.
The present invention relates to amplitude-phase consistency error calibration measurement methods between a kind of Space-borne SAR Imaging receiving channel, including with
Lower step:
Step 1: SAR system working condition and parameter setting, including signal bandwidth of operation and pulsewidth, operating mode, single machine
Master backup state, PRF value and booting duration；
Step 2: SAR system booting is realized according to working state of system and parameter setting values establishment and upper note instruction packet, together
Shi Jilu echo data；
Step 3: formatting the echo data of record and pulse pressure processing, extract after pulse pressure at peak value amplitude and
Phase compares and analyzes；
Step 4: the imaging receiver channel under step 1 and step 3 completion different bandwidth, different master backup states is repeated
Amplitude-phase consistency error measure.
Preferably, step a pair of Spaceborne SAR System working condition and parameter are configured, and select radar receiver
Signal bandwidth and pulsewidth in more receiving channel working conditions select the non-delayed reception calibration mode of full front as Working mould
Setting single machine master backup working condition, PRF and booting duration value is set as needed in formula, wherein booting duration is arranged for supervising
Survey the stability of each receiving channel amplitude-phase consistency error for a long time.
Preferably, step a pair of Spaceborne SAR System working condition and parameter are configured, and selection first is corresponding
More receiving channel bandwidth of operation realize that radar receiver and data shaper are in the work of multichannel individual reception, acquisition and coding
Make state, the non-delayed reception calibration work mode of the full front of simultaneous selection；Secondly setting each single machine master backup working condition of system,
Realize the spreadability of multiple combinations working condition test；PRF value and booting duration are finally arranged according to testing requirement.
Preferably, the step two according to SAR system working condition and parameter setting values establishment and upper note instruction wrap with
Realize that SAR system is switched on as required, Spaceborne SAR System selects the complete non-delayed reception calibration work mode of front, to meet front
All channels T/R are in simultaneously only receives working condition, then records echo data.
Preferably, the step three carries out data format turn by certain pulse spacing to the echo data of record first
It changes to obtain the corresponding echo complex data of each receiving channel；Secondly using the method for matched filtering pulse pressure to each receiving channel echo
Complex data is handled and extracts after pulse pressure interpolation amplitude and phase at peak value；Each receiving channel peak is carried out at last respective pulses
Maximum amplitude value and minimum amplitude value make the difference at value, and maximum phase value and minimum phase value make the difference at each receiving channel peak value, i.e.,
Obtain amplitude-phase consistency error measurement.
Preferably, the step four repeats to be arranged in the case where the non-delayed reception calibration work mode of full front is fixed
Different working state of system and parameter, including different signal bandwidth and pulsewidth, different single machine master backup working conditions etc.,
It repeats step 1 to step 3 and obtains under different bandwidth, different master backup state amplitude-phase consistency error measure knot between receiving channel
Fruit.
Preferably, in the step one, SAR system working condition is set and parameter concrete operation step is, first is that choosing
It selects more receiving channel working signal bandwidth and radar receiver is set and be in more receiving channel autonomous working states；Second is that spaceborne
SAR operating mode is set as the non-delayed reception calibration work mode of full front, wherein access is calibrated in the non-delayed reception of full front are as follows:
Frequency modulation signal source → internal calibrator (non-delayed) → antenna calibration network → antenna receiving channel → microwave combination → radar receives
Machine.
Preferably, in the step three, Data Format Transform is carried out to the echo data of record and obtains each imaging receiver
Channel echo complex data, and FFT conversion is carried out, each imaging receiver channel frequency domain data is S1_int(f)、S2_int(f)……SN_int
(f), matched filtering processing is carried out respectively, and matched filtering function is respectively H1(f)、H2(f)……HN(f), defeated after matched pulse pressure
It is out S1_out(f)=S1_out(f)·H1(f)、S2(f)=S2_out(f)·H2(f)……SN(f)=SN_out(f)·HN(f), respectively
The laggard row interpolation processing of the data pulse pressure in channel takes range value and phase value at peak value, and range value (unit dB) is respectively at peak value
F1_max、F2_max……FN_max, phase value (unit degree) is respectively P at peak value1_max、P2_max……PN_max, amplitude coincidence survey
Magnitude is Δ F=max (F1_max、F2_max……FN_max)-min(F1_max、F2_max……FN_max), phase equalization measured value be
Δ P=max (P1_max、P2_max……PN_max)-min(P1_max、P2_max……PN_max)。
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, amplitude-phase consistency error calibration measurement method emphasis solves star between Space-borne SAR Imaging receiving channel of the invention
The measurement problem of SAR imaging receiver interchannel amplitude-phase consistency error is carried, it can be without the measurement of microwave dark room near-field scan
Under the conditions of complete imaging receiver interchannel amplitude-phase consistency error measurement, while repeatedly can quickly and easily carry out imaging connect
Receive the monitoring of interchannel amplitude-phase consistency error；
2, between Space-borne SAR Imaging receiving channel of the invention amplitude-phase consistency error calibration measurement method to satellite-borne SAR at
Amplitude-phase consistency measurement has good effect between picture receiving channel, and can complete imaging receiver interchannel amplitude-phase consistency
The monitoring of error robustness；
3, can there is the application of amplitude-phase consistency error calibration measurement method between Space-borne SAR Imaging receiving channel of the invention
Effect ground simplifies measurement method and improves measurement efficiency, while also ensuring measurement accuracy.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon.
Fig. 1 is that Space-borne SAR Imaging interchannel amplitude-phase consistency error of the present invention calibrates measurement flow chart；
Fig. 2 is flow chart of data processing figure of the present invention.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
Embodiment
In the present embodiment, amplitude-phase consistency error calibration measurement method is situated between Space-borne SAR Imaging receiving channel of the invention
Continue as follows: step 1: Space-borne SAR Imaging interchannel amplitude-phase consistency error according to figure 1 calibrates measurement flow chart, completes
Spaceborne SAR System working condition and parameter setting, including signal bandwidth of operation and pulsewidth, system operating mode, single machine master backup
Working condition, PRF value and booting duration value；
Step 2: Space-borne SAR Imaging interchannel amplitude-phase consistency error according to figure 1 calibrates measurement flow chart, complete
At the establishment of instruction packet and upper note, and echo data is stored by surface recording device；
Step 3: flow chart of data processing figure according to Fig.2, completes data processing and analysis, to each imaging receiver channel
Calibration echo data carries out distance and amplitude and phase value at peak value is handled and extracted to pulse pressure, takes maximum amplitude value and maximum respectively
Phase value and minimum amplitude value and minimum phase value make the difference to obtain interchannel amplitude-phase consistency measurement result；
Step 4: repeating step 1 and step 3 carries out multi-state measurement, obtains unlike signal bandwidth, different master backup shapes
Amplitude-phase consistency error measurement under state.
Next the present invention is described in detail.
The present invention relates to width mutually to measure, in particular a kind of to be used for satellite-borne synthetic aperture radar imaging receiver interchannel width phase one
Cause property error measurement technology, is related to the imaging receiver interchannel amplitude-phase consistency error measure of satellite-borne synthetic aperture radar, open
Amplitude-phase consistency error calibrates measurement method between a kind of Space-borne SAR Imaging receiving channel.Including setting for SAR system working condition
It sets, the processing method of the selection of internal calibration operating mode and calibration data.The object of the present invention is to provide a kind of satellite-borne SAR at
As amplitude-phase consistency error calibration measurement method between receiving channel, the technical solution adopted by the present invention is that being based on imaging receiver channel
The individual reception of echo data and acquisition, by taking the non-delayed reception calibration work mode of full front to enroll calibration data, so
Pulse pressure processing is carried out to each imaging receiver channel reception calibration echo data afterwards, realizes that high-efficiency high-accuracy Space-borne SAR Imaging receives
The calibration measurement of interchannel amplitude-phase consistency error.Realize the measurement between amplitude-phase consistency error Space-borne SAR Imaging receiving channel
And monitoring, while in order to improve measurement accuracy and realize simplicity.
The present invention relates to amplitude-phase consistency error calibration measurement methods between a kind of Space-borne SAR Imaging receiving channel, including with
Lower step:
Step 1: SAR system working condition and parameter setting, including signal bandwidth of operation and pulsewidth, operating mode, single machine
Master backup state, PRF value and booting duration；
Step 2: SAR system booting is realized according to working state of system and parameter setting values establishment and upper note instruction packet, together
Shi Jilu echo data；
Step 3: formatting the echo data of record and pulse pressure processing, extract after pulse pressure at peak value amplitude and
Phase compares and analyzes；
Step 4: the imaging receiver channel under step 1 and step 3 completion different bandwidth, different master backup states is repeated
Amplitude-phase consistency error measure.
Preferably, step a pair of Spaceborne SAR System working condition and parameter are configured, and selection first is corresponding
More receiving channel bandwidth of operation realize that radar receiver and data shaper are in the work of multichannel individual reception, acquisition and coding
Make state, the non-delayed reception calibration work mode of the full front of simultaneous selection；Secondly setting each single machine master backup working condition of system,
Realize the spreadability of multiple combinations working condition test；PRF value and booting duration are finally arranged according to testing requirement.
Preferably, the step two is according to working state of system and parameter setting values establishment and upper note instruction packet, SAR system
Echo data recording and storage is carried out after system booting.
Preferably, the step three carries out data format turn by certain pulse spacing to the echo data of record first
It changes to obtain the corresponding echo complex data of each receiving channel；Secondly using the method for matched filtering pulse pressure to each receiving channel echo
Complex data is handled and extracts after pulse pressure amplitude and phase at peak value；It is carried out at each receiving channel peak value at last respective pulses
Maximum amplitude value and minimum amplitude value make the difference, and maximum phase value and minimum phase value make the difference at each receiving channel peak value, i.e. width phase
Conformity error measurement result.
Preferably, the step four is to meet test coverage and repeat step 1 to step 3 to obtain different bandwidth, no
With amplitude-phase consistency error measurement between receiving channel under master backup state.
More specifically, main contents of the invention are as follows:
1, SAR system working condition and parameter are set
First is that select more receiving channel working signal bandwidth and be arranged radar receiver be in more receiving channels autonomous working
State；Second is that satellite-borne SAR operating mode is set as the non-delayed reception calibration work mode of full front, connect wherein full front is non-delayed
Receive calibration access are as follows: frequency modulation signal source → internal calibrator (non-delayed) → antenna calibrates network → antenna receiving channel → microwave group
Conjunction → radar receiver.
2, imaging receiver channel calibration data are handled
Data Format Transform is carried out to the echo data of record and obtains each imaging receiver channel echo complex data, and is carried out
FFT conversion, each imaging receiver channel frequency domain data are S1_int(f)、S2_int(f)……SN_int(f), matched filtering is carried out respectively
Processing, matched filtering function is respectively H1(f)、H2(f)……HN(f), output is S after matched pulse pressure1_out(f)=S1_out
(f)·H1(f)、S2(f)=S2_out(f)·H2(f)……SN(f)=SN_out(f)·HN(f), the data pulse pressure in each channel is laggard
Row interpolation processing takes range value and phase value at peak value, and range value (unit dB) is respectively F at peak value1_max、F2_max……
FN_max, phase value (unit degree) is respectively P at peak value1_max、P2_max……PN_max, amplitude coincidence measured value is Δ F=max
(F1_max、F2_max……FN_max)-min(F1_max、F2_max……FN_max), phase equalization measured value be Δ P=max (P1_max、
P2_max……PN_max)-min(P1_max、P2_max……PN_max)。
In conclusion amplitude-phase consistency error calibrates measurement method emphasis between Space-borne SAR Imaging receiving channel of the invention
It solves the problems, such as the measurement of amplitude-phase consistency error between Space-borne SAR Imaging receiving channel, can be swept without microwave dark room near field
Retouch measurement under conditions of complete imaging receiver interchannel amplitude-phase consistency error measurement, while can repeatedly quickly and easily into
The monitoring of row imaging receiver interchannel amplitude-phase consistency error；Amplitude-phase consistency between Space-borne SAR Imaging receiving channel of the invention
Error, which calibrates measurement method, has good effect to amplitude-phase consistency measurement Space-borne SAR Imaging receiving channel, and can be with
Complete the monitoring of imaging receiver interchannel amplitude-phase consistency error robustness；Width between Space-borne SAR Imaging receiving channel of the invention
The application of consistent property error calibration measurement method can effectively simplify measurement method and improve measurement efficiency, while also guarantee
Measurement accuracy.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (8)
1. amplitude-phase consistency error calibrates measurement method between a kind of Space-borne SAR Imaging receiving channel, which is characterized in that including following
Step:
Step 1: SAR system working condition and parameter setting, including signal bandwidth of operation and pulsewidth, operating mode, single machine it is active and standby
Part state, PRF value and booting duration；
Step 2: SAR system booting is realized according to working state of system and parameter setting values establishment and upper note instruction packet, is remembered simultaneously
Record echo data；
Step 3: formatting the echo data of record and pulse pressure processing, amplitude and phase at peak value after extraction pulse pressure
It compares and analyzes；
Step 4: the imaging receiver channel width phase under step 1 and step 3 completion different bandwidth, different master backup states is repeated
Conformity error measurement.
2. amplitude-phase consistency error calibrates measurement method, feature between Space-borne SAR Imaging receiving channel as described in claim 1
It is that step a pair of Spaceborne SAR System working condition and parameter are configured, selects radar receiver to be in receive more and lead to
The signal bandwidth and pulsewidth of road working condition select the non-delayed reception calibration mode of full front as operating mode, setting single machine
PRF and booting duration value is set as needed in master backup working condition, wherein booting duration setting respectively connects for a long time for monitoring
Receive the stability of channel amplitude-phase consistency error.
3. amplitude-phase consistency error calibrates measurement method, feature between Space-borne SAR Imaging receiving channel as claimed in claim 2
It is that step a pair of Spaceborne SAR System working condition and parameter are configured, selects corresponding more receiving channel works first
Make bandwidth and realize that radar receiver and data shaper are in the working condition of multichannel individual reception, acquisition and coding, simultaneously
Select the non-delayed reception calibration work mode of full front；Secondly setting each single machine master backup working condition of system, realizes a variety of groups
Close the spreadability of working condition test；PRF value and booting duration are finally arranged according to testing requirement.
4. amplitude-phase consistency error calibrates measurement method, feature between Space-borne SAR Imaging receiving channel as described in claim 1
It is that the step two is according to SAR system working condition and parameter setting values establishment and upper note instruction packet is to realize that SAR system is pressed
It is required that booting, Spaceborne SAR System selects the complete non-delayed reception calibration work mode of front, same to meet all channels T/R of front
When in only receive a working condition, then record echo data.
5. amplitude-phase consistency error calibrates measurement method, feature between Space-borne SAR Imaging receiving channel as described in claim 1
It is that the step three carries out Data Format Transform by certain pulse spacing to the echo data of record first and respectively connect with obtaining
Receive the corresponding echo complex data in channel；Secondly at using the method for matched filtering pulse pressure to each receiving channel echo complex data
It manages and extracts after pulse pressure interpolation amplitude and phase at peak value；Amplitude peak at each receiving channel peak value is carried out at last respective pulses
Value and minimum amplitude value make the difference, and maximum phase value and minimum phase value make the difference at each receiving channel peak value, i.e. acquisition Phase amplitude-matched
Property error measurement.
6. amplitude-phase consistency error calibrates measurement method, feature between Space-borne SAR Imaging receiving channel as described in claim 1
It is that the step four in the case where the non-delayed reception calibration work mode of full front is fixed repeats that different system works is arranged
Make state and parameter, including different signal bandwidth and pulsewidth, different single machine master backup working conditions etc., repeats step 1 extremely
Amplitude-phase consistency error measurement between receiving channel under step 3 acquisition different bandwidth, different master backup states.
7. amplitude-phase consistency error calibrates measurement method, feature between Space-borne SAR Imaging receiving channel as described in claim 1
It is in the step one, SAR system working condition to be set and parameter concrete operation step is, first is that selecting more receiving channels
Working signal bandwidth is simultaneously arranged radar receiver and is in more receiving channel autonomous working states；Second is that satellite-borne SAR operating mode is set
It is set to the non-delayed reception calibration work mode of full front, wherein access is calibrated in the non-delayed reception of full front are as follows: frequency modulation signal source →
Internal calibrator → antenna calibrates network → antenna receiving channel → microwave combination → radar receiver.
8. amplitude-phase consistency error calibrates measurement method, feature between Space-borne SAR Imaging receiving channel as described in claim 1
It is in the step three, Data Format Transform to be carried out to the echo data of record and obtains each imaging receiver channel echo plural number
According to, and FFT conversion is carried out, each imaging receiver channel frequency domain data is S1_int(f)、S2_int(f)……SN_int(f), it carries out respectively
Matched filtering processing, matched filtering function is respectively H1(f)、H2(f)……HN(f), output is S after matched pulse pressure1_out(f)
=S1_out(f)·H1(f)、S2(f)=S2_out(f)·H2(f)……SN(f)=SN_out(f)·HN(f), the data arteries and veins in each channel
Laggard row interpolation processing is pressed to take range value and phase value at peak value, range value is respectively F at peak value1_max、F2_max……FN_max、
Phase value is respectively P at peak value1_max、P2_max……PN_max, amplitude coincidence measured value is Δ F=max (F1_max、
F2_max……FN_max)-min(F1_max、F2_max……FN_max), phase equalization measured value be Δ P=max (P1_max、
P2_max……PN_max)-min(P1_max、P2_max……PN_max)。
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| CN110888916A (en) * | 2019-11-21 | 2020-03-17 | 中国科学院电子学研究所 | Data processing method, device, equipment and storage medium among multiple channels |
| CN110988822A (en) * | 2019-11-21 | 2020-04-10 | 上海卫星工程研究所 | Multi-channel SAR antenna performance detection method based on wireless single TR calibration |
| CN110888916B (en) * | 2019-11-21 | 2023-03-31 | 中国科学院电子学研究所 | Data processing method, device, equipment and storage medium among multiple channels |
| CN110768733A (en) * | 2019-11-26 | 2020-02-07 | 武汉虹信通信技术有限责任公司 | Method and device for testing large-scale array antenna of integrated filter |
| CN110768733B (en) * | 2019-11-26 | 2021-12-14 | 武汉虹信科技发展有限责任公司 | Method and device for testing large-scale array antenna of integrated filter |
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| CN111123221B (en) * | 2019-12-12 | 2021-11-23 | 上海卫星工程研究所 | Active phased array system SAR channel full link amplitude and phase stability test method |
| CN112098961A (en) * | 2020-09-09 | 2020-12-18 | 北京空间飞行器总体设计部 | Method for designing and analyzing data of multi-polarization SAR (synthetic aperture radar) load internal calibration mode |
| CN112462175A (en) * | 2020-11-12 | 2021-03-09 | 中国电子科技集团公司第二十九研究所 | Radio frequency multichannel switching device |
| CN115128564A (en) * | 2022-09-02 | 2022-09-30 | 中国科学院空天信息创新研究院 | Method and device for polarization calibration of lunar orbit synthetic aperture radar |
| CN118151111A (en) * | 2024-05-11 | 2024-06-07 | 中国电子科技集团公司第十四研究所 | Novel high-amplitude phase-stable InSAR radar architecture based on non-delay internal calibration |
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