How can I read an object of an HDF file from Erik Noble on 2008-07-30 (ncl-talk 2008 archive)

From: Erik Noble <enoble_at_nyahnyahspammersnyahnyah>
Date: Wed, 30 Jul 2008 16:49:49 -0400

How does an NCL user read an object of an HDF file (even after converting it
to netcdf using ncl_convert2nc)?
I have an HDF file that contains one variable yet it has many objects
associated with it. I looked through the archives and tried following the
examples #4 and #5 (as suggested from this listing:
http://www.ncl.ucar.edu/Support/talk_archives/2007/0712.html)
but they don¹t satisfy this.

For instance, I am trying to read the object ³EpochTime² which is associated
with the ³precipitation² variable in the HDF file. This object allows me to
see the model initialization time in unixtime
Below shows the contents of both the netcdf and HDF version of the file, in
addition to attempting to read the ³EpochTime² object in NCL command line
mode.
-Erik

Erik_at_noble:/Users/Erik:cd
/Volumes/Data_and_Models/Precipitation_data/observed/TRMM
Erik_at_noble:/Volumes/Data_and_Models/Precipitation_data/observed/TRMM:
Erik_at_noble:/Volumes/Data_and_Models/Precipitation_data/observed/TRMM:ncl
Copyright (C) 1995-2007 - All Rights Reserved
University Corporation for Atmospheric Research
NCAR Command Language Version 5.0.0
The use of this software is governed by a License Agreement.
See http://www.ncl.ucar.edu/ for more details.
ncl 1> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
ncl 2> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
ncl 3> ;*********************************
ncl 4> f = addfile("3B42.060801.0.6.HDF","r")
ncl 5> P = f->precipitation(0,:,:)
ncl 6> printVarSummary(P)

Variable: P
Type: float
Total Size: 2304000 bytes
576000 values
Number of Dimensions: 2
Dimensions and sizes: [longitude | 1440] x [latitude | 400]
Coordinates:
Number Of Attributes: 1

ncl 7> ET = f->EpochTime
fatal:Either file (f) isn't defined or variable (EpochTime) is not a
variable in the file
fatal:Execute: Error occurred at or near line 10

ncl 11>
**

Erik_at_noble:/Volumes/Data_and_Models/Precipitation_data/observed/TRMM:ncl_fil
edump 3B42.060801.0.6.nc
Copyright (C) 1995-2007 - All Rights Reserved
University Corporation for Atmospheric Research
NCAR Command Language Version 5.0.0
The use of this software is governed by a License Agreement.
See http://www.ncl.ucar.edu/ for more details.
Variable: f (file variable)

filename: 3B42.060801.0.6
path: 3B42.060801.0.6.nc
   file global attributes:
      ArchiveMetadata_0 : OBJECT=DataGaps;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=DataGaps;

OBJECT=NumberOfDataGaps;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=NumberOfDataGaps;

OBJECT=AlgorithmVersion;
    Value="6.42";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=AlgorithmVersion;

OBJECT=ProductVersion;
    Value="6";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=ProductVersion;

OBJECT=ToolkitVersion;
    Value="6.38";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=ToolkitVersion;

OBJECT=CalibrationCoefficientVersion;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=CalibrationCoefficientVersion;

OBJECT=MissingData;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=MissingData;

OBJECT=PercentOfBadOrMissingPixels;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=PercentOfBadOrMissingPixels;

OBJECT=MaximumValidValueofChannel;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=MaximumValidValueofChannel;

OBJECT=MinimumValidValueofChannel;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=MinimumValidValueofChannel;

OBJECT=MinMaxUnits;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=MinMaxUnits;

OBJECT=OrbitSize;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitSize;

OBJECT=RadarWavelength;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarWavelength;

OBJECT=MinimumReflectivityThreshold;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=MinimumReflectivityThreshold;

OBJECT=AlgorithmID;
    Value="3B42";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=AlgorithmID;

OBJECT=DataAccuracy;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=DataAccuracy;

OBJECT=InputFiles;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=InputFiles;

OBJECT=DateOfGenerationOfInputFiles;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=DateOfGenerationOfInputFiles;

OBJECT=DataCenterSourceOfInputFiles;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=DataCenterSourceOfInputFiles;

OBJECT=GenerationDate;
    Value=2006-09-22T13:46:26.000Z;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=GenerationDate;

OBJECT=DayNight;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=DayNight;

OBJECT=SolarChannelGains;
    Value="(-9999.9,-9999.9,-9999.9,-9999.9)";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SolarChannelGains;

OBJECT=TMIRolloverCoef;

Value="(-9999.9,-9999.9,-9999.9,-9999.9,-9999.9,-9999.9,-9999.9,-9999.9,-999
9.9,-9999.9,-9999.9,-9999.9,-9999.9,-9999.9,-9999.9,-9999.9,-9999.9,-9999.9)
";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=TMIRolloverCoef;

OBJECT=OrbitFirstScanUTCDate;
    Value=9999/99/99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitFirstScanUTCDate;

OBJECT=OrbitFirstScanUTCTime;
    Value=99:99:99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitFirstScanUTCTime;

OBJECT=OrbitFirstScanUTCMilliseconds;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitFirstScanUTCMilliseconds;

OBJECT=OrbitFirstSCSecs;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitFirstSCSecs;

OBJECT=OrbitFirstSCSubsecs;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitFirstSCSubsecs;

OBJECT=OrbitLastScanUTCDate;
    Value=9999/99/99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitLastScanUTCDate;

OBJECT=OrbitLastScanUTCTime;
    Value=99:99:99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitLastScanUTCTime;

OBJECT=OrbitLastScanUTCmilliseconds;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitLastScanUTCmilliseconds;

OBJECT=OrbitLastSCSecs;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitLastSCSecs;

OBJECT=OrbitLastSCSubsecs;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitLastSCSubsecs;

OBJECT=UTCFSeconds;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=UTCFSeconds;

OBJECT=UTCFSubseconds;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=UTCFSubseconds;

OBJECT=UTCFflag;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=UTCFflag;

OBJECT=LeapSecondsFlag;
    Value= ;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=LeapSecondsFlag;

OBJECT=RadarSiteName;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarSiteName;

OBJECT=RadarCity;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarCity;

OBJECT=RadarState;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarState;

OBJECT=RadarCountry;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarCountry;

OBJECT=NumberOfVOS;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=NumberOfVOS;

OBJECT=RadarGridOriginLatitude;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarGridOriginLatitude;

OBJECT=RadarGridOriginLongitude;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarGridOriginLongitude;

OBJECT=RadarGridOriginAltitude;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarGridOriginAltitude;

OBJECT=RadarGridSpacingX;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarGridSpacingX;

OBJECT=RadarGridSpacingY;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarGridSpacingY;

OBJECT=RadarGridSpacingZ;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarGridSpacingZ;

OBJECT=RadarGridSizeX;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarGridSizeX;

OBJECT=RadarGridSizeY;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarGridSizeY;

OBJECT=RadarGridSizeZ;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadarGridSizeZ;

OBJECT=DZCal;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=DZCal;

OBJECT=GVL1C_Scale;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=GVL1C_Scale;

OBJECT=Alpha;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=Alpha;

OBJECT=RuntimeOptions;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RuntimeOptions;

OBJECT=AnomalyFlag;
    Value="NOT EMPTY";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=AnomalyFlag;

OBJECT=SoftwareVersion;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SoftwareVersion;

OBJECT=DatabaseVersion;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=DatabaseVersion;

OBJECT=TotalQualityCode;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=TotalQualityCode;

OBJECT=LongitudeOnEquator;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=LongitudeOnEquator;

OBJECT=UTCDateOnEquator;
    Value=9999/99/99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=UTCDateOnEquator;

OBJECT=UTCTimeOnEquator;
    Value=99:99:99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=UTCTimeOnEquator;

OBJECT=UTCMillisecsOnEquator;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=UTCMillisecsOnEquator;

OBJECT=CenterScanUTCDate;
    Value=9999/99/99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=CenterScanUTCDate;

OBJECT=CenterScanUTCTime;
    Value=99:99:99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=CenterScanUTCTime;

OBJECT=CenterScanUTCMillisec;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=CenterScanUTCMillisec;

OBJECT=FirstScanLat;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=FirstScanLat;

OBJECT=FirstScanLon;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=FirstScanLon;

OBJECT=LastScanLat;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=LastScanLat;

OBJECT=LastScanLon;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=LastScanLon;

OBJECT=NumberOfRainScans;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=NumberOfRainScans;

END;
      CoreMetadata_0 : OBJECT=OrbitNumber;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitNumber;

OBJECT=RangeBeginningDate;
    Value=2006/07/31;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RangeBeginningDate;

OBJECT=RangeBeginningTime;
    Value=22:30:00;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RangeBeginningTime;

OBJECT=RangeEndingDate;
    Value=2006/08/01;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RangeEndingDate;

OBJECT=RangeEndingTime;
    Value=01:30:00;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RangeEndingTime;

OBJECT=GranulePointer;
    Value="3B42.060801.0.6.HDF";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=GranulePointer;

OBJECT=ShortName;
    Value="Surface Rain from all Satellite and Surface";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=ShortName;

OBJECT=SizeMBECSDataGranule;
    Value=4.394812;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SizeMBECSDataGranule;

OBJECT=LongitudeOfMaximumLatitude;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=LongitudeOfMaximumLatitude;

OBJECT=SpatialCoverageType;
    Value="Horizontal";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SpatialCoverageType;

OBJECT=EllipsoidName;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=EllipsoidName;

OBJECT=EquatorialRadius;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=EquatorialRadius;

OBJECT=DenominatorFlatteningRatio;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=DenominatorFlatteningRatio;

OBJECT=OrbitalModelName;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitalModelName;

OBJECT=SemiMajorAxis;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SemiMajorAxis;

OBJECT=MeanAnomaly;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=MeanAnomaly;

OBJECT=RightAscensionNode;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RightAscensionNode;

OBJECT=ArgumentOfPerigee;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=ArgumentOfPerigee;

OBJECT=Eccentricity;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=Eccentricity;

OBJECT=Inclination;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=Inclination;

OBJECT=EpochTime;
    Value=99:99:99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=EpochTime;

OBJECT=EpochDate;
    Value=9999/99/99;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=EpochDate;

OBJECT=EpochMillisec;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=EpochMillisec;

OBJECT=WestBoundingCoordinate;
    Value=-180;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=WestBoundingCoordinate;

OBJECT=EastBoundingCoordinate;
    Value=180;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=EastBoundingCoordinate;

OBJECT=NorthBoundingCoordinate;
    Value=50;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=NorthBoundingCoordinate;

OBJECT=SouthBoundingCoordinate;
    Value=-50;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SouthBoundingCoordinate;

OBJECT=CenterLatitude;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=CenterLatitude;

OBJECT=CenterLongitude;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=CenterLongitude;

OBJECT=RadiusValue;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=RadiusValue;

OBJECT=LatitudeResolution;
    Value=".25deg";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=LatitudeResolution;

OBJECT=LongitudeResolution;
    Value=".25deg";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=LongitudeResolution;

OBJECT=GeographicCoordinateUnits;
    Value="Decimal Degrees";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=GeographicCoordinateUnits;

OBJECT=TemporalRangeType;
    Value="Continuous Range";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=TemporalRangeType;

OBJECT=QualityAssuranceParameterName;
    Value="ScienceQualityFlag";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=QualityAssuranceParameterName;

OBJECT=QualityAssuranceParameterValue;
    Value="NOT BEING INVESTIGATED";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=QualityAssuranceParameterValue;

OBJECT=ReprocessingActual;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=ReprocessingActual;

OBJECT=BrowsePointer;
    Value="3B42_BR.060801.0.6.BRO";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=BrowsePointer;

OBJECT=ScienceContact;
    Value="George Huffman";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=ScienceContact;

OBJECT=MeanMotion;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=MeanMotion;

OBJECT=OrbitAdjustFlag;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitAdjustFlag;

OBJECT=AttitudeModeFlag;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=AttitudeModeFlag;

OBJECT=SolarBetaAngleAtBeginningOfGranule;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SolarBetaAngleAtBeginningOfGranule;

OBJECT=SolarBetaAngleAtEndOfGranule;
    Value=-9999.9;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SolarBetaAngleAtEndOfGranule;

OBJECT=SensorAlignment;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SensorAlignment;

OBJECT=SensorAlignmentChannelOffsets;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=SensorAlignmentChannelOffsets;

OBJECT=ScanPathModel;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=ScanPathModel;

OBJECT=ScanPathModelParam;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=ScanPathModelParam;

OBJECT=EphemerisFileID;
    Value="NULL";
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=EphemerisFileID;

END;
      creation_date : Wed Jul 30 15:48:12 EDT 2008
      NCL_Version : 5.0.0
      system : Darwin noble.giss.nasa.gov 9.4.0 Darwin Kernel Version 9.4.0:
Mon Jun 9 19:30:53 PDT 2008; root:xnu-1228.5.20~1/RELEASE_I386 i386
      conventions : None
      hdf_source : 3B42.060801.0.6.HDF
      title : NCL: convert-HDF-to-netCDF
   dimensions:
      scan = 1
      longitude = 1440
      latitude = 400
   variables:
      float relativeError ( scan, longitude, latitude )
         hdf_name : relativeError

float precipitation ( scan, longitude, latitude )
hdf_name : precipitation

Erik_at_noble:/Volumes/Data_and_Models/Precipitation_data/observed/TRMM:ncl_fil
edump 3B42.060801.0.6.HDF
Copyright (C) 1995-2007 - All Rights Reserved
University Corporation for Atmospheric Research
NCAR Command Language Version 5.0.0
The use of this software is governed by a License Agreement.
See http://www.ncl.ucar.edu/ for more details.
Variable: f (file variable)

filename: 3B42.060801.0.6
path: 3B42.060801.0.6.HDF
   file global attributes:
      CoreMetadata_0 : OBJECT=OrbitNumber;
    Value=-9999;
    Data_Location=PGE;
    Mandatory=FALSE;
END_OBJECT=OrbitNumber;