Earthdata Forum

I have mostly not had issues with opening l2 netCDF files in the SeaDAS GUI, but 2 files in particular have both thrown errors when I try to load them.

The files are Landsat 8 and 9 L2 netcdf files generated from L1 ESPA downloaded data.

I error I get in the first file is:

java.util.zip.ZipException: unknown compression method
at java.base/java.util.zip.InflaterInputStream.read(Unknown Source)
at java.base/java.io.FilterInputStream.read(Unknown Source)
at ucar.nc2.util.IO.copyB(IO.java:194)
at ucar.nc2.iosp.hdf5.H5tiledLayoutBB$DataChunk.inflate(H5tiledLayoutBB.java:255)
at ucar.nc2.iosp.hdf5.H5tiledLayoutBB$DataChunk.getByteBuffer(H5tiledLayoutBB.java:216)
at ucar.nc2.iosp.LayoutBBTiled.hasNext(LayoutBBTiled.java:101)
Caused: java.lang.IllegalStateException
at ucar.nc2.iosp.LayoutBBTiled.hasNext(LayoutBBTiled.java:104)
at ucar.nc2.iosp.hdf5.H5tiledLayoutBB.hasNext(H5tiledLayoutBB.java:124)
at ucar.nc2.iosp.IospHelper.readData(IospHelper.java:332)
at ucar.nc2.iosp.IospHelper.readDataFill(IospHelper.java:274)
at ucar.nc2.iosp.hdf5.H5iosp.readData(H5iosp.java:150)
at ucar.nc2.iosp.hdf5.H5iosp.readData(H5iosp.java:123)
at ucar.nc2.NetcdfFile.readData(NetcdfFile.java:2110)
at ucar.nc2.Variable.reallyRead(Variable.java:761)
at ucar.nc2.Variable._read(Variable.java:731)
at ucar.nc2.Variable._read(Variable.java:773)
at ucar.nc2.Variable.read(Variable.java:597)
at gov.nasa.gsfc.seadas.dataio.SeadasFileReader.invalidateLines(SeadasFileReader.java:2147)
at gov.nasa.gsfc.seadas.dataio.L2FileReader.createProduct(L2FileReader.java:97)
at gov.nasa.gsfc.seadas.dataio.SeadasProductReader.readProductNodesImpl(SeadasProductReader.java:205)
at org.esa.snap.core.dataio.AbstractProductReader.readProductNodes(AbstractProductReader.java:175)
at org.esa.snap.core.dataio.ProductIO.readProduct(ProductIO.java:181)
at org.esa.snap.rcp.actions.file.ReadProductOperation.run(ReadProductOperation.java:61)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

The error I get for the second file is:

​​java.lang.IllegalArgumentException: numElems is less than one
at org.esa.snap.core.datamodel.ProductData.createInstance(ProductData.java:228)
at org.esa.snap.core.datamodel.DataNode.createCompatibleProductData(DataNode.java:320)
at org.esa.snap.core.datamodel.RasterDataNode.createCompatibleRasterData(RasterDataNode.java:1687)
at org.esa.snap.core.datamodel.Band.readRasterDataFully(Band.java:424)
at org.esa.snap.core.datamodel.AbstractBand.loadRasterData(AbstractBand.java:751)
at org.esa.snap.core.datamodel.RasterDataNode.loadRasterData(RasterDataNode.java:956)
at org.esa.snap.core.dataio.geocoding.GeoCodingFactory.getGeoRaster(GeoCodingFactory.java:163)
at org.esa.snap.core.dataio.geocoding.GeoCodingFactory.createPixelGeoCoding(GeoCodingFactory.java:49)
at gov.nasa.gsfc.seadas.dataio.L2FileReader.addPixelGeocoding(L2FileReader.java:364)
at gov.nasa.gsfc.seadas.dataio.L2FileReader.addGeocoding(L2FileReader.java:207)
at gov.nasa.gsfc.seadas.dataio.L2FileReader.createProduct(L2FileReader.java:160)
at gov.nasa.gsfc.seadas.dataio.SeadasProductReader.readProductNodesImpl(SeadasProductReader.java:205)
at org.esa.snap.core.dataio.AbstractProductReader.readProductNodes(AbstractProductReader.java:175)
at org.esa.snap.core.dataio.ProductIO.readProduct(ProductIO.java:181)
at org.esa.snap.rcp.actions.file.ReadProductOperation.run(ReadProductOperation.java:61)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

I am currently using a python script with the netCDF4 and subprocess libraries to run the l2gen command, and I am wondering if the reason these errors are getting thrown is due to some issue with SeaDAS, the input file, or my script.

Note that I am currently running SeaDAS through its application on a MacBook Pro 14.

You can try running 'ncdump -h' to see if they are valid netCDF and 'file' to see if the file is compressed without an extension to indicate it?

Tommy

Please let us know what version of SeaDAS are you using.

It will be helpful for us to replicate the issues if you can share the name of the Landsat L8 and l9 files, and from where you downloaded the files.

After continuing to play around with my SeaDAS processing script, I realized that the errors were most likely due to SeaDAS loading these files from their saved ___location on an external hard drive. Once I moved the files to my computer drive, none of the newer files had issues being opened.

Glad that you have figured it out! Thanks for reporting back