SARAmplitudeEstimation¶
SAR Amplitude estimation thanks to the associated DEM.
Description¶
This application estimates a simulated amplitude image thanks to a DEM file.
This application has several output images and supports “multi-writing”. Instead of computing and writing each image independently, the streamed image blocks are written in a synchronous way for each output. The output images will be computed strip by strip, using the available RAM to compute the strip size, and a user defined streaming mode can be specified using the streaming extended filenames (type, mode and value). Note that multi-writing can be disabled using the multi-write extended filename option: &multiwrite=false, in this case the output images will be written one by one. Note that multi-writing is not supported for MPI writers.
Parameters¶
Input vector of DEM projected into SAR geometry -indemproj image Mandatory
Input vector image for amplitude estimation.
Input DEM -indem image Mandatory
DEM to extract DEM geometry.
Input SAR image -insar image Mandatory
SAR Image to extract SAR geometry.
Multiplying gain -gain float Mandatory
Multiplying gain to obtain a mean radiometry at 100.
No Data values for the DEM -nodata int Default value: -32768
No Data values for the DEM.
Range direction for DEM scan -directiondemc int Default value: 1
Range direction for DEM scan.
Azimut direction for DEM scan -directiondeml int Default value: 1
Azimut direction for DEM scan.
Output amplitude Image -out image [dtype] Mandatory
Output amplitude Image.
Available RAM (MB) -ram int Default value: 256
Available memory for processing (in MB).
Examples¶
From the command-line:
otbcli_SARAmplitudeEstimation -indemproj CLZY_S21E055.tiff -indem S21E055.hgt -insar s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_SLC.tiff -out s1a-s4-simu-amplitude.tiff
From Python:
import otbApplication
app = otbApplication.Registry.CreateApplication("SARAmplitudeEstimation")
app.SetParameterString("indemproj", "CLZY_S21E055.tiff")
app.SetParameterString("indem", "S21E055.hgt")
app.SetParameterString("insar", "s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_SLC.tiff")
app.SetParameterString("out", "s1a-s4-simu-amplitude.tiff")
app.ExecuteAndWriteOutput()
Limitations¶
Only Sentinel 1 (IW and StripMap mode) and Cosmo products are supported for now.