SARInterferogram

Interferogram between two SAR images.

Description

This application builds the interferogram between two 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 SAR Slave image (Coregistrated image) -insarslave image Mandatory
Input SAR Slave image (Coregistrated image).

Input SAR Master image -insarmaster image Mandatory
Input SAR Master image.

Input Topographic Phase (estimation with DEM projection) -topographicphase image
Input Topographic Phase (estimation with DEM projection).

ML factor on distance -mlran int Default value: 3
ML factor on distance

ML factor on azimut -mlazi int Default value: 3
ML factor on azimut

Margin on distance for averaging -marginran int Default value: 1
Margin on distance for averaging

Margin on azimut for averaging -marginazi int Default value: 1
Margin on azimut for averaging

Gain to apply for amplitude estimation -gain float Default value: 0.1
Gain to apply for amplitude estimation

Interferogram -out image [dtype] Mandatory
Output Vector Image : Interferogram.

Available RAM (MB) -ram int Default value: 256
Available memory for processing (in MB).

Examples

From the command-line:

otbcli_SARInterferogram -insarslave s1b-s4-slc-vv-20160929t014610-20160929t014634-002277-003d71-002.tiff -insarmaster s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_SLC.tiff -mlran 3 -mlazi 3 -gain 0.1 -out s1b-s1a-s4-interferogram.tiff

From Python:

import otbApplication

app = otbApplication.Registry.CreateApplication("SARInterferogram")

app.SetParameterString("insarslave", "s1b-s4-slc-vv-20160929t014610-20160929t014634-002277-003d71-002.tiff")
app.SetParameterString("insarmaster", "s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_SLC.tiff")
app.SetParameterInt("mlran", 3)
app.SetParameterInt("mlazi", 3)
app.SetParameterFloat("gain", 0.1)
app.SetParameterString("out", "s1b-s1a-s4-interferogram.tiff")

app.ExecuteAndWriteOutput()

Limitations

Only Sentinel 1 (IW and StripMap mode) and Cosmo products are supported for now.