IL97559A - ESAHP ECNEREFFID autofocus for RAS Rader mapping - Google Patents
ESAHP ECNEREFFID autofocus for RAS Rader mappingInfo
- Publication number
- IL97559A IL97559A IL9755991A IL9755991A IL97559A IL 97559 A IL97559 A IL 97559A IL 9755991 A IL9755991 A IL 9755991A IL 9755991 A IL9755991 A IL 9755991A IL 97559 A IL97559 A IL 97559A
- Authority
- IL
- Israel
- Prior art keywords
- subarray
- array
- correlation function
- peak
- fft
- Prior art date
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
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/9004—SAR image acquisition techniques
- G01S13/9011—SAR image acquisition techniques with frequency domain processing of the SAR signals in azimuth
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/9004—SAR image acquisition techniques
- G01S13/9019—Auto-focussing of the SAR signals
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Signal Processing (AREA)
- Radar Systems Or Details Thereof (AREA)
- Complex Calculations (AREA)
- Image Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Image Analysis (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/502,000 US4999635A (en) | 1990-03-29 | 1990-03-29 | Phase difference auto focusing for synthetic aperture radar imaging |
Publications (2)
Publication Number | Publication Date |
---|---|
IL97559A0 IL97559A0 (en) | 1992-06-21 |
IL97559A true IL97559A (en) | 1994-05-30 |
Family
ID=23995905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL9755991A IL97559A (en) | 1990-03-29 | 1991-03-14 | ESAHP ECNEREFFID autofocus for RAS Rader mapping |
Country Status (9)
Country | Link |
---|---|
US (1) | US4999635A (fr) |
EP (1) | EP0449303B1 (fr) |
JP (1) | JPH04223288A (fr) |
KR (1) | KR950000339B1 (fr) |
AU (1) | AU638558B2 (fr) |
CA (1) | CA2038071C (fr) |
DE (1) | DE69127764T2 (fr) |
ES (1) | ES2106741T3 (fr) |
IL (1) | IL97559A (fr) |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4037725A1 (de) * | 1990-11-27 | 1992-06-11 | Deutsche Forsch Luft Raumfahrt | Verfahren zur digitalen generierung von sar-bildern und einrichtung zu dessen durchfuehrung |
DE4122592C1 (fr) * | 1991-07-08 | 1993-01-28 | Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt Ev, 5300 Bonn, De | |
US5160931A (en) * | 1991-09-19 | 1992-11-03 | Environmental Research Institute Of Michigan | Interferometric synthetic aperture detection of sparse non-surface objects |
US5164730A (en) * | 1991-10-28 | 1992-11-17 | Hughes Aircraft Company | Method and apparatus for determining a cross-range scale factor in inverse synthetic aperture radar systems |
US5248976A (en) * | 1991-11-27 | 1993-09-28 | Hughes Aircraft Company | Multiple discrete autofocus |
US5184134A (en) * | 1991-11-27 | 1993-02-02 | Hughes Aircraft Company | Fast phase difference autofocus |
US5200754A (en) * | 1991-11-27 | 1993-04-06 | Hughes Aircraft Company | Fourth-order-product phase difference autofocus |
US5570099A (en) * | 1993-10-15 | 1996-10-29 | Loral Federal Systems Company | TDOA/FDOA technique for locating a transmitter |
JP2697627B2 (ja) * | 1994-09-12 | 1998-01-14 | 日本電気株式会社 | 相関処理装置および合成開口レーダの画像再生処理装置 |
US5488374A (en) * | 1994-10-14 | 1996-01-30 | Hughes Aircraft Company | Multi-scale adaptive filter for interferometric SAR data |
US5546085A (en) * | 1994-12-05 | 1996-08-13 | Loral Corporation | Separating coherent radio-frequency interference from synthetic aperture data |
DE19609728C2 (de) * | 1996-03-13 | 1998-01-29 | Deutsche Forsch Luft Raumfahrt | Verfahren zur Azimut-Skalierung von SAR-Daten und hochgenauer Prozessor zur zweidimensionalen Verarbeitung von ScanSAR-Daten |
US5673050A (en) * | 1996-06-14 | 1997-09-30 | Moussally; George | Three-dimensional underground imaging radar system |
US6046695A (en) * | 1996-07-11 | 2000-04-04 | Science Application International Corporation | Phase gradient auto-focus for SAR images |
WO1998045726A1 (fr) * | 1997-04-09 | 1998-10-15 | Daimler-Benz Aerospace Ag | Procede pour surveiller la surface de la terre |
US5854602A (en) * | 1997-04-28 | 1998-12-29 | Erim International, Inc. | Subaperture high-order autofocus using reverse phase |
US5850202A (en) * | 1997-07-29 | 1998-12-15 | Erim International, Inc. | Method for improving SAR system sensitivity in the presence of RF interference |
US6037892A (en) * | 1998-05-28 | 2000-03-14 | Multispec Corporation | Method for automatic focusing of radar or sonar imaging systems using high-order measurements |
JP4069545B2 (ja) * | 1999-05-19 | 2008-04-02 | 株式会社日立製作所 | 電子顕微方法及びそれを用いた電子顕微鏡並び生体試料検査方法及び生体検査装置 |
KR100446452B1 (ko) * | 2002-05-22 | 2004-09-01 | 국방과학연구소 | 방향탐지기의 방위오차 저감장치 |
US6603424B1 (en) | 2002-07-31 | 2003-08-05 | The Boeing Company | System, method and computer program product for reducing errors in synthetic aperture radar signals |
JP4223767B2 (ja) * | 2002-08-30 | 2009-02-12 | 富士通株式会社 | クロスオーバ検出方法、レーダ装置及びクロスオーバ検出プログラム |
US7126524B2 (en) * | 2004-08-04 | 2006-10-24 | Raytheon Company | Motion compensation for convolutional SAR algorithms |
US7064702B1 (en) | 2005-03-01 | 2006-06-20 | The Boeing Company | System, method and computer program product for reducing quadratic phase errors in synthetic aperture radar signals |
US7391357B1 (en) * | 2005-03-25 | 2008-06-24 | Sandia Corporation | Correction of motion measurement errors beyond the range resolution of a synthetic aperture radar |
DE602005025415D1 (de) * | 2005-05-31 | 2011-01-27 | Saab Ab | Stufenfreqenz-radareinrichtung |
US7307580B2 (en) * | 2006-01-17 | 2007-12-11 | Raytheon Company | Non-statistical method for compressing and decompressing complex SAR data |
US7663529B2 (en) * | 2006-08-15 | 2010-02-16 | General Dynamics Advanced Information Systems, Inc. | Methods for two-dimensional autofocus in high resolution radar systems |
US7728757B2 (en) * | 2008-06-09 | 2010-06-01 | The Boeing Company | Autofocus for minimum entropy through multi-dimensional optimization |
GB2482551A (en) * | 2010-08-06 | 2012-02-08 | Qinetiq Ltd | Alignment of synthetic aperture radar images |
JP5979868B2 (ja) * | 2011-12-21 | 2016-08-31 | 三菱電機株式会社 | 画像レーダ装置 |
US9239383B2 (en) * | 2012-01-10 | 2016-01-19 | Raytheon Company | Wide beam SAR focusing method using navigation solution derived from autofocus data |
CN103869312B (zh) * | 2012-12-12 | 2016-06-29 | 中国科学院电子学研究所 | 一种连续场景的稀疏阵列sar侧视三维成像方法 |
US10107895B2 (en) | 2014-09-19 | 2018-10-23 | The Boeing Company | Amplitude calibration of a stepped-chirp signal for a synthetic aperture radar |
US9952313B2 (en) | 2014-09-19 | 2018-04-24 | The Boeing Company | Phase calibration of a stepped-chirp signal for a synthetic aperture radar |
US10495750B1 (en) * | 2015-11-19 | 2019-12-03 | National Technology & Engineering Solutions Of Sandia, Llc | Spectral replacement to mitigate interference for multi-pass synthetic aperture radar |
US10591582B1 (en) | 2015-11-19 | 2020-03-17 | National Technology & Engineering Solutions Of Sandia, Llc | Co-notch and independent windowing to mitigate interference in SAR-based imagery |
CN113204022B (zh) * | 2021-04-30 | 2022-07-29 | 电子科技大学 | 基于相关向量机线性阵列sar三维成像快速贝叶斯压缩感知方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4339752A (en) * | 1971-06-15 | 1982-07-13 | Hughes Aircraft Company | Synthetic array processor |
US4219811A (en) * | 1975-02-07 | 1980-08-26 | Hughes Aircraft Company | Synthetic array autofocus system |
EP0083107B1 (fr) * | 1981-12-28 | 1989-03-29 | Nec Corporation | Système de traitement d'images pour radar à ouverture synthétique |
US4771287A (en) * | 1983-06-23 | 1988-09-13 | Westinghouse Electric Corp. | Method of correcting for errors in radar imaging |
USH741H (en) * | 1984-07-12 | 1990-02-06 | The United States Of America As Represented By The Secretary Of The Air Force | Discrete complex correlation device for obtaining subpixel accuracy |
US4724418A (en) * | 1986-03-24 | 1988-02-09 | United Technologies Corporation | Synthetic aperture radar focusing |
USH471H (en) * | 1986-11-24 | 1988-05-03 | The United States Of America As Represented By The United States Department Of Energy | Remnant field detector |
US5043734A (en) * | 1988-12-22 | 1991-08-27 | Hughes Aircraft Company | Discrete autofocus for ultra-high resolution synthetic aperture radar |
US4924229A (en) * | 1989-09-14 | 1990-05-08 | The United States Of America As Represented By The United States Department Of Energy | Phase correction system for automatic focusing of synthetic aperture radar |
-
1990
- 1990-03-29 US US07/502,000 patent/US4999635A/en not_active Expired - Lifetime
-
1991
- 1991-03-12 CA CA002038071A patent/CA2038071C/fr not_active Expired - Fee Related
- 1991-03-13 AU AU72916/91A patent/AU638558B2/en not_active Ceased
- 1991-03-14 IL IL9755991A patent/IL97559A/en not_active IP Right Cessation
- 1991-03-28 KR KR1019910004862A patent/KR950000339B1/ko not_active IP Right Cessation
- 1991-03-28 DE DE69127764T patent/DE69127764T2/de not_active Expired - Lifetime
- 1991-03-28 JP JP3090025A patent/JPH04223288A/ja active Pending
- 1991-03-28 EP EP91105046A patent/EP0449303B1/fr not_active Expired - Lifetime
- 1991-03-28 ES ES91105046T patent/ES2106741T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR950000339B1 (ko) | 1995-01-13 |
DE69127764D1 (de) | 1997-11-06 |
EP0449303A3 (en) | 1993-08-11 |
ES2106741T3 (es) | 1997-11-16 |
DE69127764T2 (de) | 1998-04-02 |
AU7291691A (en) | 1991-10-03 |
US4999635A (en) | 1991-03-12 |
EP0449303B1 (fr) | 1997-10-01 |
JPH04223288A (ja) | 1992-08-13 |
IL97559A0 (en) | 1992-06-21 |
AU638558B2 (en) | 1993-07-01 |
CA2038071C (fr) | 1995-01-03 |
KR910017202A (ko) | 1991-11-05 |
EP0449303A2 (fr) | 1991-10-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
IL97559A (en) | ESAHP ECNEREFFID autofocus for RAS Rader mapping | |
EP0378832B1 (fr) | Dispositif discret de focalisation automatique pour imagerie effectuée par radar à ouverture synthétique à ultra-haute résolution | |
US4924229A (en) | Phase correction system for automatic focusing of synthetic aperture radar | |
US4616227A (en) | Method of reconstructing synthetic aperture radar image | |
CA2200039C (fr) | Methode pour lever les ambiguites dans la mesure de phase | |
EP0395863B1 (fr) | Radiomètre à ouverture synthétisée utilisant une technique numérique de concentration du faisceau | |
Doerry | Basics of Polar-Format algorithm for processing Synthetic Aperture Radar images. | |
CA2229767C (fr) | Methode permettant de corriger le decalage spectral dependant de l'objet dans des interferogrammes radar | |
WO2008021374A2 (fr) | Procédés d'auto-focalisation bidimensionnel dans des systèmes radar haute résolution | |
JPH05249237A (ja) | 多重ディスクリートオートフォーカス | |
KR960014822B1 (ko) | 4차적 위상차 오토포커스 계산 방법 | |
US5191344A (en) | Method for digital generation of sar images and apparatus for carrying out said method | |
WO1995024657A1 (fr) | Ameliorations concernant l'imagerie acoustique temporisee numerique | |
Rossini | Interpolating functions with gradient discontinuities via variably scaled kernels | |
Park et al. | Grid-free compressive mode extraction | |
Pailhas et al. | Impact of temporal Doppler on synthetic aperture sonar imagery | |
Raney | An exact wide field digital imaging algorithm | |
Vu et al. | A comparison between fast factorized backprojection and frequency-domain algorithms in UWB lowfrequency SAR | |
US5488373A (en) | Signal processing apparatus for synthetic aperture radar | |
EP0014619B1 (fr) | Dispositif de filtrage dynamique non linéaire du bruit de mesure angulaire dans un radar, et système radar le comportant | |
Gough et al. | Displaced ping imaging autofocus for a multi-hydrophone SAS | |
Sosnovsky et al. | An InSAR phase unwrapping algorithm with the phase discontinuity compensation | |
JP6289389B2 (ja) | 画像レーダ装置 | |
Wiehle et al. | A satellite on-board SAR processing chain for generation of rapid civil alerts | |
CN109164437B (zh) | 用于矢量阵列流行的连续可变小数时延估计方法及装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
RH | Patent void |