Since the latest snap-engine update (8.0.8), the calibration node seems have an issue with the Intensity_VV source band. The settings of the Calibration node are listed below as well as the error message from GPT, which is repeated while it tries to process this source band. No exception is caught, however, and the resulting Beta0_VV is just empty. Intensity_VH works perfectly fine on the other hand.
I’ve reproduced this issue with another scene and I can say for certain that corrrect results were produced for both scenes before the latest update.
<parameters class="com.bc.ceres.binding.dom.XppDomElement">
<sourceBands>Intensity_VV</sourceBands>
<auxFile>Latest Auxiliary File</auxFile>
<externalAuxFile/>
<outputImageInComplex>false</outputImageInComplex>
<outputImageScaleInDb>false</outputImageScaleInDb>
<createGammaBand>false</createGammaBand>
<createBetaBand>false</createBetaBand>
<selectedPolarisations>VV,VH</selectedPolarisations>
<outputSigmaBand>false</outputSigmaBand>
<outputGammaBand>false</outputGammaBand>
<outputBetaBand>true</outputBetaBand>
</parameters>
org.esa.snap.core.gpf.OperatorException: Calibration information not found.
at org.esa.s1tbx.calibration.gpf.calibrators.Sentinel1Calibrator.computeTile(Sentinel1Calibrator.java:582)
at org.esa.s1tbx.calibration.gpf.CalibrationOp.computeTile(CalibrationOp.java:190)
at org.esa.snap.core.gpf.internal.OperatorImage.computeRect(OperatorImage.java:82)
at javax.media.jai.SourcelessOpImage.computeTile(Unknown Source)
at com.sun.media.jai.util.SunTileScheduler.scheduleTile(Unknown Source)
at javax.media.jai.OpImage.getTile(Unknown Source)
at javax.media.jai.PlanarImage.getData(Unknown Source)
at com.bc.ceres.glevel.MultiLevelImage.getData(MultiLevelImage.java:64)
at org.esa.snap.core.gpf.internal.OperatorContext.getSourceTile(OperatorContext.java:449)
at org.esa.snap.core.gpf.internal.OperatorContext.getSourceTile(OperatorContext.java:435)
at org.esa.snap.core.gpf.internal.OperatorImage.computeRect(OperatorImage.java:75)
at javax.media.jai.SourcelessOpImage.computeTile(Unknown Source)
at com.sun.media.jai.util.SunTileScheduler.scheduleTile(Unknown Source)
at javax.media.jai.OpImage.getTile(Unknown Source)
at com.sun.media.jai.util.RequestJob.compute(Unknown Source)
at com.sun.media.jai.util.WorkerThread.run(Unknown Source)