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# SARAmplitudeEstimation
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SAR Amplitude estimation thanks to the associated DEM.
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## Description
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This application estimates a simulated amplitude image thanks to a DEM file.
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## Parameters
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**Input vector of DEM projected into SAR geometry** `-indemproj image` *Mandatory* <br />
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Input vector image for amplitude estimation.
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**Input DEM** `-indem image` *Mandatory* <br />
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DEM to extract DEM geometry.
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**Input SAR image** `-insar image` *Mandatory* <br />
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SAR Image to extract SAR geometry.
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**Multiplying gain** `-gain float` *Mandatory* <br />
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Multiplying gain to obtain a mean radiometry at 100.
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**No Data values for the DEM** `-nodata int` *Default value: -32768* <br />
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No Data values for the DEM.
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**Range direction for DEM scan** `-directiondemc int` *Default value: 1* <br />
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Range direction for DEM scan.
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**Azimut direction for DEM scan** `-directiondeml int` *Default value: 1* <br />
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Azimut direction for DEM scan.
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**Output amplitude Image** `-out image [dtype]` *Mandatory* <br />
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Output amplitude Image.
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**Available RAM (MB)** `-ram int` *Default value: 256* <br />
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Available memory for processing (in MB).
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## Examples
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From the command-line:
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```
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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
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```
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From Python:
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```
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import otbApplication
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app = otbApplication.Registry.CreateApplication("SARAmplitudeEstimation")
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app.SetParameterString("indemproj", "CLZY_S21E055.tiff")
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app.SetParameterString("indem", "S21E055.hgt")
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app.SetParameterString("insar", "s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_SLC.tiff")
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app.SetParameterString("out", "s1a-s4-simu-amplitude.tiff")
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app.ExecuteAndWriteOutput()
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```
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## Limitations
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Only Sentinel 1 products are supported for now. |