S1_GRD_preprocessing.xml

<graph id="S1 GRD preprocessing">
  <version>1.0</version>
  <!-- 
    <root xmlns:copyright="http://www.w3.org/1999/xhtml">
      <metadata>
        <author name="Federico Filipponi" />
        <author contact="federico.filipponi@gmail.com" />
        <copyright name="CC BY-SA" />
        <license type="GPL" />
        <license version="3" />
      </metadata>
    </root>
  -->
  <!-- usage example: 
    /opt/snap/bin/gpt S1_GRD_preprocessing.xml -Presolution=10 -Porigin=5 -Pfilter='None' -Pdem='SRTM 3Sec' -Pcrs='GEOGCS["WGS84(DD)", DATUM["WGS84", SPHEROID["WGS84", 6378137.0, 298.257223563]], PRIMEM["Greenwich", 0.0], UNIT["degree", 0.017453292519943295], AXIS["Geodetic longitude", EAST], AXIS["Geodetic latitude", NORTH]]' -Pinput=/media/workspace/S1A_IW_GRDH_1SDV_20160228T051920_20160228T051956_010142_00EF52_AB5E.SAFE -Poutput=/media/workspace/S1A_IW_GRDH_1SDV_20160228T051920_20160228T051956_010142_00EF52_AB5E.dim
  -->
  <node id="Read">
    <operator>Read</operator>
    <sources/>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <file>${input}</file>
    </parameters>
  </node>
  <node id="Apply-Orbit-File">
    <operator>Apply-Orbit-File</operator>
    <sources>
      <sourceProduct refid="Read"/>
    </sources>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <orbitType>Sentinel Precise (Auto Download)</orbitType>
      <polyDegree>3</polyDegree>
      <continueOnFail>true</continueOnFail>
    </parameters>
  </node>
  <node id="ThermalNoiseRemoval">
    <operator>ThermalNoiseRemoval</operator>
    <sources>
      <sourceProduct refid="Apply-Orbit-File"/>
    </sources>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <selectedPolarisations/>
      <removeThermalNoise>true</removeThermalNoise>
      <reIntroduceThermalNoise>false</reIntroduceThermalNoise>
    </parameters>
  </node>
  <node id="Remove-GRD-Border-Noise">
    <operator>Remove-GRD-Border-Noise</operator>
    <sources>
      <sourceProduct refid="ThermalNoiseRemoval"/>
    </sources>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <selectedPolarisations/>
      <borderLimit>500</borderLimit>
      <trimThreshold>50</trimThreshold>
    </parameters>
  </node>
  <node id="Calibration-Sigma">
    <operator>Calibration</operator>
    <sources>
      <sourceProduct refid="Remove-GRD-Border-Noise"/>
    </sources>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <sourceBands/>
      <auxFile>Product Auxiliary File</auxFile>
      <externalAuxFile/>
      <outputImageInComplex>false</outputImageInComplex>
      <outputImageScaleInDb>false</outputImageScaleInDb>
      <createGammaBand>false</createGammaBand>
      <createBetaBand>false</createBetaBand>
      <selectedPolarisations/>
      <outputSigmaBand>true</outputSigmaBand>
      <outputGammaBand>false</outputGammaBand>
      <outputBetaBand>false</outputBetaBand>
    </parameters>
  </node>
  <node id="Speckle-Filter">
    <operator>Speckle-Filter</operator>
    <sources>
      <sourceProduct refid="Calibration-Sigma"/>
    </sources>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <sourceBands/>
      <filter>${filter}</filter>
      <filterSizeX>3</filterSizeX>
      <filterSizeY>3</filterSizeY>
      <dampingFactor>2</dampingFactor>
      <estimateENL>true</estimateENL>
      <enl>1.0</enl>
      <numLooksStr>1</numLooksStr>
      <windowSize>7x7</windowSize>
      <targetWindowSizeStr>3x3</targetWindowSizeStr>
      <sigmaStr>0.9</sigmaStr>
      <anSize>50</anSize>
    </parameters>
  </node>
  <node id="Terrain-Correction">
    <operator>Terrain-Correction</operator>
    <sources>
      <sourceProduct refid="Speckle-Filter"/>
    </sources>    
    <parameters>
        <sourceBands/>
        <demName>${dem}</demName>
        <externalDEMNoDataValue>0.0</externalDEMNoDataValue>
        <externalDEMApplyEGM>true</externalDEMApplyEGM>
        <demResamplingMethod>BILINEAR_INTERPOLATION</demResamplingMethod>
        <imgResamplingMethod>BILINEAR_INTERPOLATION</imgResamplingMethod>
        <pixelSpacingInMeter>${resolution}</pixelSpacingInMeter>
        <mapProjection>${crs}</mapProjection>
        <alignToStandardGrid>true</alignToStandardGrid>
        <standardGridOriginX>${origin}</standardGridOriginX>
        <standardGridOriginY>${origin}</standardGridOriginY>
        <nodataValueAtSea>false</nodataValueAtSea>
        <saveDEM>false</saveDEM>
        <saveLatLon>false</saveLatLon>
        <saveIncidenceAngleFromEllipsoid>false</saveIncidenceAngleFromEllipsoid>
        <saveLocalIncidenceAngle>false</saveLocalIncidenceAngle>
        <saveProjectedLocalIncidenceAngle>false</saveProjectedLocalIncidenceAngle>
        <saveSelectedSourceBand>true</saveSelectedSourceBand>
        <outputComplex>false</outputComplex>
        <applyRadiometricNormalization>false</applyRadiometricNormalization>
        <saveSigmaNought>false</saveSigmaNought>
        <saveGammaNought>false</saveGammaNought>
        <saveBetaNought>false</saveBetaNought>
        <incidenceAngleForSigma0>Use projected local incidence angle from DEM</incidenceAngleForSigma0>
        <incidenceAngleForGamma0>Use projected local incidence angle from DEM</incidenceAngleForGamma0>
        <auxFile>Latest Auxiliary File</auxFile>
    </parameters>
  </node>
  <node id="LinearToFromdB">
    <operator>LinearToFromdB</operator>
    <sources>
      <sourceProduct refid="Terrain-Correction"/>
    </sources>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <sourceBands/>
    </parameters>
  </node>
  <node id="Write">
    <operator>Write</operator>
    <sources>
      <sourceProduct refid="LinearToFromdB"/>
    </sources>
    <parameters class="com.bc.ceres.binding.dom.XppDomElement">
      <file>${output}</file>
      <formatName>BEAM-DIMAP</formatName>
    </parameters>
  </node>
  <applicationData id="Presentation">
    <Description>Sentinel-1 GRD Sigma0 standard preprocessing graph</Description>
    <node id="Read">
      <displayPosition x="30.0" y="30.0"/>
    </node>
    <node id="Apply-Orbit-File">
      <displayPosition x="30.0" y="60.0"/>
    </node>
    <node id="ThermalNoiseRemoval">
      <displayPosition x="30.0" y="90.0"/>
    </node>
    <node id="Remove-GRD-Border-Noise">
      <displayPosition x="30.0" y="120.0"/>
    </node>
    <node id="Calibration-Sigma">
      <displayPosition x="30.0" y="150.0"/>
    </node>
    <node id="Speckle-Filter">
      <displayPosition x="30.0" y="180.0"/>
    </node>
    <node id="Terrain-Correction">
      <displayPosition x="30.0" y="210.0"/>
    </node>
    <node id="LinearToFromdB">
      <displayPosition x="30.0" y="240.0"/>
    </node>
    <node id="Write">
      <displayPosition x="30.0" y="270.0"/>
    </node>
  </applicationData>
</graph>