CA2020644A1 - Method for extracting motion errors of a platform carrying a coherent imaging radar system from the raw radar data and device for executing the method - Google Patents

Method for extracting motion errors of a platform carrying a coherent imaging radar system from the raw radar data and device for executing the method

Info

Publication number
CA2020644A1
CA2020644A1 CA2020644A CA2020644A CA2020644A1 CA 2020644 A1 CA2020644 A1 CA 2020644A1 CA 2020644 A CA2020644 A CA 2020644A CA 2020644 A CA2020644 A CA 2020644A CA 2020644 A1 CA2020644 A1 CA 2020644A1
Authority
CA
Canada
Prior art keywords
antenna
platform carrying
ground
extracting motion
motion errors
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.)
Granted
Application number
CA2020644A
Other languages
French (fr)
Other versions
CA2020644C (en
Inventor
Joao Moreira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsche Forschungs und Versuchsanstalt fuer Luft und Raumfahrt eV DFVLR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Deutsche Forschungs und Versuchsanstalt fuer Luft und Raumfahrt eV DFVLR filed Critical Deutsche Forschungs und Versuchsanstalt fuer Luft und Raumfahrt eV DFVLR
Publication of CA2020644A1 publication Critical patent/CA2020644A1/en
Application granted granted Critical
Publication of CA2020644C publication Critical patent/CA2020644C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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

Abstract

In a method for extracting motion errors of a platform carrying a coherent imaging radar system from raw radar data, azimuth spectra continuously following each other in time are formed over a set period of time for the imaging of terrains with mainly homogenous ground reflectivities.An estimate of the ground reflectivity part is performed with a Kalman filter and with the aid of the azimuth spectra represented and system parameters entered. Then the antenna pattern part is obtained by dividing the azimuth spectrum by the estimated ground reflecti-vity part. By frequency filtering a separation of the drift angle ? (t) from the velocity Vb(t) in the LOS- direction of the antenna is subsequently performed and then the velocity obtained is subjected to normalization after having been integrated, from which results the displacement in the line of sight direction of the antenna.
CA002020644A 1989-07-07 1990-07-06 Method for extracting motion errors of a platform carrying a coherent imaging radar system from the raw radar data and device for executing the method Expired - Fee Related CA2020644C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3922427A DE3922427C1 (en) 1989-07-07 1989-07-07
DEP3922427.9 1989-07-07

Publications (2)

Publication Number Publication Date
CA2020644A1 true CA2020644A1 (en) 1991-01-08
CA2020644C CA2020644C (en) 1995-01-31

Family

ID=6384528

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002020644A Expired - Fee Related CA2020644C (en) 1989-07-07 1990-07-06 Method for extracting motion errors of a platform carrying a coherent imaging radar system from the raw radar data and device for executing the method

Country Status (4)

Country Link
US (1) US5045855A (en)
EP (1) EP0406879B1 (en)
CA (1) CA2020644C (en)
DE (2) DE3922427C1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922428A1 (en) * 1989-07-07 1991-01-17 Deutsche Forsch Luft Raumfahrt METHOD FOR THE EXTRACTION OF MOTION ERRORS OF A CARRIER CARRYING OUT A RADAR RAW DATA WITH A COHERENT IMAGE RADAR SYSTEM AND DEVICE FOR IMPLEMENTING THE METHOD
DE4124062C1 (en) * 1991-07-19 1992-09-03 Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt Ev, 5300 Bonn, De
DE69222024T2 (en) * 1992-03-03 1998-04-16 Deutsche Forsch Luft Raumfahrt Method and apparatus for extracting motion errors from a platform carrying a coherent imaging radar system
US5343203A (en) * 1992-09-24 1994-08-30 Hughes Aircraft Company Doppler tracking method for object imaging from radar returns
DE4311754C1 (en) * 1993-04-08 1994-06-23 Deutsche Forsch Luft Raumfahrt Method for extracting movement errors of a carrier carrying a coherent imaging radar system from raw radar data and device for carrying out the method
DE4323511C1 (en) * 1993-07-14 1995-01-26 Deutsche Aerospace Radar device for obstacle warning
US5614907A (en) * 1996-03-14 1997-03-25 Daimler-Benz Aerospace Ag All weather visual system for helicopters
SE511509C3 (en) * 1997-12-23 1999-11-22 Ericsson Telefon Ab L M Method for optimizing the drawing area for a sensor
US6037893A (en) * 1998-07-31 2000-03-14 Litton Systems, Inc. Enhanced motion compensation technique in synthetic aperture radar systems
FR2886020B1 (en) * 2005-05-19 2007-10-19 Eurocopter France SPEED ESTIMATING SYSTEM OF AN AIRCRAFT AND ITS APPLICATION TO DETECTION OF OBSTACLES
US9562788B1 (en) * 2011-09-30 2017-02-07 Rockwell Collins, Inc. System and method for doppler aided navigation using weather radar
US9354633B1 (en) 2008-10-31 2016-05-31 Rockwell Collins, Inc. System and method for ground navigation
US9939526B2 (en) 2007-09-06 2018-04-10 Rockwell Collins, Inc. Display system and method using weather radar sensing
US9733349B1 (en) 2007-09-06 2017-08-15 Rockwell Collins, Inc. System for and method of radar data processing for low visibility landing applications
CA2802784C (en) * 2010-06-28 2016-03-15 Institut National D'optique Method and apparatus for compensating for a parameter change in a synthetic aperture imaging system
US8909471B1 (en) 2011-09-30 2014-12-09 Rockwell Collins, Inc. Voting system and method using doppler aided navigation
US8952841B1 (en) * 2012-01-13 2015-02-10 Rockwell Collins, Inc. System and method for TCAS based navigation
US9262932B1 (en) 2013-04-05 2016-02-16 Rockwell Collins, Inc. Extended runway centerline systems and methods
US10928510B1 (en) 2014-09-10 2021-02-23 Rockwell Collins, Inc. System for and method of image processing for low visibility landing applications
US10705201B1 (en) 2015-08-31 2020-07-07 Rockwell Collins, Inc. Radar beam sharpening system and method
US10228460B1 (en) 2016-05-26 2019-03-12 Rockwell Collins, Inc. Weather radar enabled low visibility operation system and method
US10353068B1 (en) 2016-07-28 2019-07-16 Rockwell Collins, Inc. Weather radar enabled offshore operation system and method
CN111220992B (en) * 2018-11-26 2022-05-20 长沙智能驾驶研究院有限公司 Radar data fusion method, device and system

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US4359732A (en) * 1963-11-21 1982-11-16 Goodyear Aerospace Corporation Topographical mapping radar
GB2069281B (en) * 1979-07-31 1983-08-10 Marconi Co Ltd Doppler radar system
GB2185651B (en) * 1979-10-19 1988-01-27 Emi Ltd Synthetic aperture radar
GB2185869B (en) * 1979-10-19 1987-12-23 Emi Ltd Doppler technique of synthetic aperture radar motion compensation
US4771287A (en) * 1983-06-23 1988-09-13 Westinghouse Electric Corp. Method of correcting for errors in radar imaging
GB8630315D0 (en) * 1986-12-18 1987-04-15 Gen Electric Co Plc Synthetic aperture radar
GB8714746D0 (en) * 1987-06-24 1987-07-29 Secr Defence Synthetic aperture radar

Also Published As

Publication number Publication date
EP0406879A2 (en) 1991-01-09
EP0406879A3 (en) 1991-09-04
US5045855A (en) 1991-09-03
EP0406879B1 (en) 1995-04-12
DE59008881D1 (en) 1995-05-18
CA2020644C (en) 1995-01-31
DE3922427C1 (en) 1991-01-24

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