Terrain Correction Warning Messages - should I ignore them?

Hello,

I have noticed a number of warning (or error?) messages during Terrain Correction using SRTM Level 1 (HGT). The log is given below. The causes don’t appear to crash the terrain correction though.

Anyone know why these are produced and experienced these too? Most importantly, shall I just ignore them?

Thanks,
Sanjay.

Processing Source N:\CROME\2018\Sentinel1\Jan\Jan_Raw\S1B_IW_GRDH_1SDV_20180108T174911_20180108T174936_009083_0103D3_2296.zip at 11/05/2018 8:17:07.55
Source N:\CROME\2018\Sentinel1\Jan\Jan_Raw\S1B_IW_GRDH_1SDV_20180108T174911_20180108T174936_009083_0103D3_2296.zip
Target N:\CROME\2018\Sentinel1\Jan\Jan_SNAP_Processed\PP_S1B_IW_GRDH_1SDV_20180108T174911_20180108T174936_009083_0103D3_2296.dim
INFO: org.esa.snap.core.gpf.operators.tooladapter.ToolAdapterIO: Initializing external tool adapters
Executing processing graph
INFO: org.hsqldb.persist.Logger: dataFileCache open start
version = 2.84
SEVERE: org.esa.snap.core.dataop.dem.ElevationFile: Illegal file name format: N54W003.SRTMGL1.hgt.zip
SEVERE: org.esa.snap.core.dataop.dem.ElevationFile: Illegal file name format: N54W004.SRTMGL1.hgt.zip
INFO: org.esa.snap.core.dataop.dem.ElevationFile: http retrieving http://step.esa.int/auxdata/dem/SRTMGL1/N54W003.SRTMGL1.hgt.zip
INFO: org.esa.snap.core.dataop.dem.ElevationFile: http retrieving http://step.esa.int/auxdata/dem/SRTMGL1/N54W004.SRTMGL1.hgt.zip
INFO: org.esa.snap.core.dataop.dem.ElevationFile: http retrieving http://step.esa.int/auxdata/dem/SRTMGL1/N54E000.SRTMGL1.hgt.zip
WARNING: org.esa.snap.core.dataop.dem.ElevationFile: http error:http://step.esa.int/auxdata/dem/SRTMGL1/N54E000.SRTMGL1.hgt.zip on http://step.esa.int/auxdata/dem/SRTMGL1/N54E000.SRTMGL1.hgt.zip
.INFO: org.esa.snap.core.dataop.dem.ElevationFile: http retrieving http://step.esa.int/auxdata/dem/SRTMGL1/N54E001.SRTMGL1.hgt.zip
WARNING: org.esa.snap.core.dataop.dem.ElevationFile: http error:http://step.esa.int/auxdata/dem/SRTMGL1/N54E001.SRTMGL1.hgt.zip on http://step.esa.int/auxdata/dem/SRTMGL1/N54E001.SRTMGL1.hgt.zip
…10%…INFO: org.esa.snap.core.dataop.dem.ElevationFile: http retrieving http://step.esa.int/auxdata/dem/SRTMGL1/N53E001.SRTMGL1.hgt.zip
WARNING: org.esa.snap.core.dataop.dem.ElevationFile: http error:http://step.esa.int/auxdata/dem/SRTMGL1/N53E001.SRTMGL1.hgt.zip on http://step.esa.int/auxdata/dem/SRTMGL1/N53E001.SRTMGL1.hgt.zip
…20%…30%…40%…50%…60%…70%…80%…90% done.
Processing completed at 11/05/2018 8:26:05.82

I guess this is just SNAP accessing the SRTM archive and downloading the data. If the process is completed, I wouldn’t mind it any further.

Thanks Andreas. Out of interest - why are these warnings generated?

maybe one of the developers can clarify that.

Hopefully. Some of the missing tiles are outside the extent of England - I would guess it might be an area in sea.