「Introduction to Radar data processing」の版間の差分
提供: OSGeo.JP Wiki
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+ | === Software installation === | ||
+ | |||
+ | '''Windows:''' | ||
+ | * 1. Download the IDL virtual machine: http://www.ittvis.com/download/download.asp?urlProductCode=10 (select Windows version, then select "I am evaluating", then "Download") | ||
+ | * 2. Download the RAT [http://radartools.berlios.de/download.php binaries] and run the installer | ||
+ | |||
+ | '''Linux:''' | ||
+ | * 1. Download the IDL virtual machine: http://www.ittvis.com/download/download.asp?urlProductCode=10 (select Linux version, then select "I am evaluating", then "Download") | ||
+ | * 2. Download the RAT [http://radartools.berlios.de/download.php binaries] and unpack them | ||
+ | * 3. Change into the rat_v0.21/ directory and start RAT with: | ||
+ | idl -vm=rat.sav | ||
=== Sample data === | === Sample data === |
2010年1月28日 (木) 19:30時点における版
目次
Introduction to Radar data processing
Sensors
- PALSAR: Phased Array type L-band Synthetic Aperture Radar
- about system (HTML)
- ERSDAC PALSAR Pamphlet, PDF 8 pages
SAR analysis methods
- SAR backscatter analysis (about): enables to estimate volume of water contained in soil, volume of biomass in forests, conditions of waves in the ocean etc.
- Requirements: ...
- SAR interferometry processing (about): enables to produce elevation data and to measure topographical change (two SAR images are used - called Master Image and Slave image, respectively)
- Requirements: complex SAR data - Single Look Complex as parallax is not removed
- General steps (cited from CCRS tutorial):
- Process data to SLC images
- Register the two images to 1/10 pixel
- Over-sample by a factor of 2 in both dimensions
- Filter common bands in spectrum
- Conjugate multiply to form interferogram
- Smooth the interferogram
- Measure coherence
- Unwrap phase
- Estimate geometry parameters (especially baseline)
- Remove flat-earth fringes
- Convert unwrapped phase to height and/or motion
- Polarimetric SAR processing (about): forest fire monitoring, classification of vegetation (height), water content in vegetation, monitoring of snow cover, condition of ice, flood monitoring and soil moisture.
- Requirements: ...
Frequency and Wavelength of the IEEE Radar Band designation
Frequency [GHz] | Wavelength [mm] | Band |
1-2 | 30-15 | L Band |
2-4 | 15-75 | S Band |
4-8 | 75-375 | C Band |
8-12 | 375-250 | X Band |
12-18 | 250-167 | Ku Band |
18-27 | 167-111 | K Band |
27-40 | 111-0.75 | Ka Band |
Software installation
Windows:
- 1. Download the IDL virtual machine: http://www.ittvis.com/download/download.asp?urlProductCode=10 (select Windows version, then select "I am evaluating", then "Download")
- 2. Download the RAT binaries and run the installer
Linux:
- 1. Download the IDL virtual machine: http://www.ittvis.com/download/download.asp?urlProductCode=10 (select Linux version, then select "I am evaluating", then "Download")
- 2. Download the RAT binaries and unpack them
- 3. Change into the rat_v0.21/ directory and start RAT with:
idl -vm=rat.sav
Sample data
- ERSDAC data download (various)
- RAT data download (various)
- ESA dataset package (Italy Earthquake, April 2009)
See also
- RADAR and SAR Glossary
- CCRS Tutorial: Radar Remote Sensing (PDF)