Applications/app_SARAmplitudeEstimation.md

+# SARAmplitudeEstimation
+
+SAR Amplitude estimation thanks to the associated DEM.
+
+## Description
+
+This application estimates a simulated amplitude image thanks to a DEM file.
+
+## Parameters
+
+**Input vector of DEM projected into SAR geometry** `-indemproj image` *Mandatory* <br />
+Input vector image for amplitude estimation.
+
+**Input DEM** `-indem image` *Mandatory* <br />
+DEM to extract DEM geometry.
+
+**Input SAR image** `-insar image` *Mandatory* <br />
+SAR Image to extract SAR geometry.
+
+**Multiplying gain** `-gain float` *Mandatory* <br />
+Multiplying gain to obtain a mean radiometry at 100.
+
+**No Data values for the DEM** `-nodata int` *Default value: -32768* <br />
+No Data values for the DEM.
+
+**Range direction for DEM scan** `-directiondemc int` *Default value: 1* <br />
+Range direction for DEM scan.
+
+**Azimut direction for DEM scan** `-directiondeml int` *Default value: 1* <br />
+Azimut direction for DEM scan.
+
+**Output amplitude Image** `-out image [dtype]` *Mandatory* <br />
+Output  amplitude Image.
+
+**Available RAM (MB)** `-ram int` *Default value: 256* <br />
+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 products are supported for now.