SARFineDeformationGrid¶
geo_grid step for Diapason chain.
Description¶
This application executes the geo_grid step with three internal applications : SARCorrelationGrid, SARDEMGrid and SARCorrectionGrid. The aim is to obtain a fine deformation grid between master and slave SAR images.
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 DEM -indem image Mandatory
DEM to extract DEM geometry.
Input SAR Master image -insarmaster image Mandatory
SAR Master Image to extract SAR geometry.
Input SAR Slave image -insarslave image Mandatory
SAR Slave Image to extract SAR geometry.
Input Master Multilooked (real image) -inmlmaster image Mandatory
Master Image Multilooked (real image).
Input Slave Multilooked (real image) -inmlslave image Mandatory
Slave Image Multilooked (real image).
Output Deformation grid (Vector image) -out image [dtype] Mandatory
Output Deformation Grid Vector Image (Shift_ran, Shift_azi).
Available RAM (MB) -ram int Default value: 256
Available memory for processing (in MB).
Input vector of DEM projected into SAR Master geometry -indemprojmaster image
Input vector of DEM projected into SAR Master geometry.
Input vector of DEM projected into SAR Slave geometry -indemprojslave image
Input vector of DEM projected into SAR Slave geometry.
MultiLook factor on distance -mlran int Default value: 3
MultiLook factor on distance.
MultiLook factor on azimut -mlazi int Default value: 3
MultiLook factor on azimut.
Grid step for range dimension (into SLC/SAR geometry) -gridsteprange int Default value: 150
Grid step for range dimension (into SLC/SAR geometry).
Grid step for azimut dimension (into SLC/SAR geometry) -gridstepazimut int Default value: 150
Grid step for azimut dimension (into SLC/SAR geometry).
Threshold for correlation rate -threshold float Default value: 0.3
Threshold for correlation rate.
Maximum difference between input grid values and mean values -gap float Default value: 0.7
Maximum difference between input grid values and mean values.
Give an advantage to DEM or Correlation Grid -advantage string
Give an advantage to DEM or Correlation Grid.
Examples¶
From the command-line:
otbcli_SARFineDeformationGrid -indem S21E055.hgt -insarmaster s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_SLC.tiff -inmlmaster s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_ML.tiff -insarslave s1b-s4-slc-vv-20160929t014610-20160929t014634-002277-003d71-002_SLC.tiff -inmlslave s1b-s4-slc-vv-20160929t014610-20160929t014634-002277-003d71-002_ML.tiff -out fineDeformationGrid.tiff
From Python:
import otbApplication
app = otbApplication.Registry.CreateApplication("SARFineDeformationGrid")
app.SetParameterString("indem", "S21E055.hgt")
app.SetParameterString("insarmaster", "s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_SLC.tiff")
app.SetParameterString("inmlmaster", "s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_ML.tiff")
app.SetParameterString("insarslave", "s1b-s4-slc-vv-20160929t014610-20160929t014634-002277-003d71-002_SLC.tiff")
app.SetParameterString("inmlslave", "s1b-s4-slc-vv-20160929t014610-20160929t014634-002277-003d71-002_ML.tiff")
app.SetParameterString("out", "fineDeformationGrid.tiff")
app.ExecuteAndWriteOutput()
Limitations¶
Only Sentinel 1 (IW and StripMap mode) and Cosmo products are supported for now.