JPS57179769A - Correcting system for picture distortion of synthetic aperture-face radar - Google Patents
Correcting system for picture distortion of synthetic aperture-face radarInfo
- Publication number
- JPS57179769A JPS57179769A JP56065942A JP6594281A JPS57179769A JP S57179769 A JPS57179769 A JP S57179769A JP 56065942 A JP56065942 A JP 56065942A JP 6594281 A JP6594281 A JP 6594281A JP S57179769 A JPS57179769 A JP S57179769A
- Authority
- JP
- Japan
- Prior art keywords
- picture
- data
- function
- region
- sar
- 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.)
- Pending
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
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
PURPOSE:To realize a simple and quick correction without lowering the picture distortion, by obtaining a picture data for each local region to regard the system as a linear form and then obtaining a complex conjugation of the secondary Fourier convertion as a correction function for the answer function of a key point to carry out the correction. CONSTITUTION:The radar hologram data, i.e., an SAR (Synthetic Aperture-face Radar) picture is caught for each local region D which is fractionated in terms of the distance and direction. The SAR picture is regarded to be in a linear system in the region D, and the answer function is obtained from an annotation data using the time as a parameter for the key point of the SAR picture. The complex conjugation obtained by giving the secondary Fourier conversion to the answer function is used as a compensation function, and at the same time the secondary Fourier conversion is given to the hologram data in the region D. Then this hologram data is multiplied by the compensation function in a frequency region. The adverse secondary Fourier conversion is given to the result of multiplication and this result is delivered in the form of a data that has been corrected for picture distortion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56065942A JPS57179769A (en) | 1981-04-30 | 1981-04-30 | Correcting system for picture distortion of synthetic aperture-face radar |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56065942A JPS57179769A (en) | 1981-04-30 | 1981-04-30 | Correcting system for picture distortion of synthetic aperture-face radar |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57179769A true JPS57179769A (en) | 1982-11-05 |
Family
ID=13301521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56065942A Pending JPS57179769A (en) | 1981-04-30 | 1981-04-30 | Correcting system for picture distortion of synthetic aperture-face radar |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57179769A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6020162A (en) * | 1983-07-15 | 1985-02-01 | Hitachi Ltd | Reproducing processing system of synthetic-aperture radar picture |
JPS61138189A (en) * | 1984-12-10 | 1986-06-25 | Nec Corp | Synthetic aperture radar image processing device |
JPS61194379A (en) * | 1985-02-25 | 1986-08-28 | Nec Corp | Synthetic aperture radar image processing apparatus |
JPS61241682A (en) * | 1985-04-19 | 1986-10-27 | Mitsubishi Electric Corp | Synthetic aperture radar equipment |
JPS6280767A (en) * | 1985-10-04 | 1987-04-14 | Hitachi Ltd | Reproducing processing system for synthetic aperture radar image |
JP2011169869A (en) * | 2010-02-22 | 2011-09-01 | Mitsubishi Electric Corp | Apparatus for processing radar signal |
-
1981
- 1981-04-30 JP JP56065942A patent/JPS57179769A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6020162A (en) * | 1983-07-15 | 1985-02-01 | Hitachi Ltd | Reproducing processing system of synthetic-aperture radar picture |
JPH0456268B2 (en) * | 1983-07-15 | 1992-09-07 | Hitachi Ltd | |
JPS61138189A (en) * | 1984-12-10 | 1986-06-25 | Nec Corp | Synthetic aperture radar image processing device |
JPS61194379A (en) * | 1985-02-25 | 1986-08-28 | Nec Corp | Synthetic aperture radar image processing apparatus |
JPH0543071B2 (en) * | 1985-02-25 | 1993-06-30 | Nippon Electric Co | |
JPS61241682A (en) * | 1985-04-19 | 1986-10-27 | Mitsubishi Electric Corp | Synthetic aperture radar equipment |
JPH054037B2 (en) * | 1985-04-19 | 1993-01-19 | Mitsubishi Electric Corp | |
JPS6280767A (en) * | 1985-10-04 | 1987-04-14 | Hitachi Ltd | Reproducing processing system for synthetic aperture radar image |
JP2011169869A (en) * | 2010-02-22 | 2011-09-01 | Mitsubishi Electric Corp | Apparatus for processing radar signal |
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