SAR Radiometric calibration

Brief Description

Perform radiometric calibration of SAR images. Following sensors are supported: TerraSAR-X, Sentinel1 and Radarsat-2.Both Single Look Complex(SLC) and detected products are supported as input.

Tags

Calibration, SAR

Long Description

The objective of SAR calibration is to provide imagery in which the pixel values can be directly related to the radar backscatter of the scene. This application allows computing Sigma Naught (Radiometric Calibration) for TerraSAR-X, Sentinel1 L1 and Radarsat-2 sensors. Metadata are automatically retrieved from image products.The application supports complex and non-complex images (SLC or detected products).

Parameters

• Input Image (in): Input complex image

• Output Image (out): Output calibrated image. This image contains the backscatter (sigmaNought) of the input image.

• Available RAM (Mb) (ram): Available memory for processing (in MB)

• Disable Noise (noise): Flag to disable noise. For 5.2.0 release, the noise values are only read by TerraSARX product.

• Lookup table sigma /gamma/ beta/ DN. (lut): Lookup table values are not available with all SAR products. Products that provide lookup table with metadata are: Sentinel1, Radarsat2.

  • Use sigma nought lookup (sigma): Use Sigma nought lookup value from product metadata

  • Use gamma nought lookup (gamma): Use Gamma nought lookup value from product metadata

  • Use beta nought lookup (beta): Use Beta nought lookup value from product metadata

  • Use DN value lookup (dn): Use DN value lookup value from product metadata



• Load otb application from xml file (inxml): Load otb application from xml file

• Save otb application to xml file (outxml): Save otb application to xml file

Limitations

None

Authors

OTB-Team

See also

Example of use

• Values for GUIs:

• in: RSAT_imagery_HH.tif

• out: SarRadiometricCalibration.tif

• Command line to execute:

otbcli_SARCalibration -in RSAT_imagery_HH.tif -out SarRadiometricCalibration.tif