I’m trying to follow the procedure for ETAD for InSAR Improvement. in this tutorial. Everything goes fine up to interferogram formation where SNAP stops with the following message:
java.lang.NullPointerException: Cannot invoke “java.lang.Integer.intValue()” because the return value of “java.util.Map.get(Object)” is null
** at eu.esa.sar.insar.gpf.InterferogramOp.computeETADPhaseWithHeightCompensation(InterferogramOp.java:2047)**
** at eu.esa.sar.insar.gpf.InterferogramOp.computeETADPhase(InterferogramOp.java:1856)**
** at eu.esa.sar.insar.gpf.InterferogramOp.computePartialTile(InterferogramOp.java:1593)**
Caused: org.esa.snap.core.gpf.OperatorException: Cannot invoke “java.lang.Integer.intValue()” because the return value of “java.util.Map.get(Object)” is null
** at org.esa.snap.engine_utilities.gpf.OperatorUtils.catchOperatorException(OperatorUtils.java:434)**
** at eu.esa.sar.insar.gpf.InterferogramOp.computePartialTile(InterferogramOp.java:1660)**
** at eu.esa.sar.insar.gpf.InterferogramOp.computeTileStackForTOPSARProduct(InterferogramOp.java:1466)**
Caused: org.esa.snap.core.gpf.OperatorException: Cannot invoke “java.lang.Integer.intValue()” because the return value of “java.util.Map.get(Object)” is null
** at org.esa.snap.engine_utilities.gpf.OperatorUtils.catchOperatorException(OperatorUtils.java:434)**
** at eu.esa.sar.insar.gpf.InterferogramOp.computeTileStackForTOPSARProduct(InterferogramOp.java:1470)**
** at eu.esa.sar.insar.gpf.InterferogramOp.computeTileStack(InterferogramOp.java:1026)**
** at org.esa.snap.core.gpf.internal.OperatorImageTileStack.computeRect(OperatorImageTileStack.java:122)**
** at org.esa.snap.core.gpf.internal.OperatorImageTileStack.computeTile(OperatorImageTileStack.java:86)**
Caused: org.esa.snap.core.gpf.OperatorException: Cannot invoke “java.lang.Integer.intValue()” because the return value of “java.util.Map.get(Object)” is null
** at org.esa.snap.core.gpf.internal.OperatorExecutor$GPFImagingListener.errorOccurred(OperatorExecutor.java:326)**
** at com.sun.media.jai.util.SunTileScheduler.sendExceptionToListener(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.multilevel.MultiLevelImage.getData(MultiLevelImage.java:61)**
** 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)**
[catch] at com.sun.media.jai.util.WorkerThread.run(Unknown Source)
Just for information in my SAR data there sea areas. The co-registered product looks fine for me even though the master is larger than the slave. Could this be the problem?
One more question - does anybody succeeded in making ETAD Correction on its own data?
Thx