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CoreMetadata and ArchiveMetadata attributes for OPeNDAP MODIS downloads

https://forum.earthdata.nasa.gov/viewtopic.php?t=5931

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CoreMetadata and ArchiveMetadata attributes for OPeNDAP MODIS downloads

Posted: Sun Sep 08, 2024 7:20 pm America/New_York
by timothy.w.hilton
Hello,
Have the global attributes changed for OPeNDAP MODIS data downloads? On 6 June 2024, downloading the below URL gave me a netCDF file with 200 global attribute fields; of these 195 begin with CoreMetadata or ArchiveMetadata. Today the same URL gives me a netCDF file with 5 global attributes fields; all of the CoreMetadata and ArchiveMetadata ones are missing. My processing pipeline uses a few of those metadata fields - how can I get them back?

URL: https://opendap.cr.usgs.gov/opendap/hyrax/MOD09A1.061/h29v13.ncml.dap.nc4?dap4.ce=/YDim[0:1:2399];/XDim[0:1:2399];/sur_refl_b02[591:600][0:1:2399][0:1:2399];/sur_refl_b06[591:600][0:1:2399][0:1:2399];/sur_refl_qc_500m[591:600][0:1:2399][0:1:2399];/time[591:600]

today's download:

Code: Select all

// global attributes:
		:HDFEOSVersion = "HDFEOS_V2.19" ;
		:identifier_product_doi = "10.5067/MODIS/MOD09A1.061" ;
		:identifier_product_doi_authority = "https://doi.org" ;
		:history = "2024-09-08 22:58:50 GMT hyrax-1.16.8 https://opendap.cr.usgs.gov/opendap/hyrax/MOD09A1.061/h29v13.ncml.dap.nc4?dap4.ce=/YDim%5B0:1:2399%5D;/XDim%5B0:1:2399%5D;/sur_refl_b02%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;/sur_refl_b06%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;/sur_refl_qc_500m%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;/time%5B591:600%5D\n" ;
		:history_json = "[{\"$schema\":\"https:\\/\\/harmony.earthdata.nasa.gov\\/schemas\\/history\\/0.1.0\\/history-0.1.0.json\",\"date_time\":\"2024-09-08T22:58:50.062+0000\",\"program\":\"hyrax\",\"version\":\"1.16.8\",\"parameters\":[{\"request_url\":\"https:\\/\\/opendap.cr.usgs.gov\\/opendap\\/hyrax\\/MOD09A1.061\\/h29v13.ncml.dap.nc4?dap4.ce=\\/YDim%5B0:1:2399%5D;\\/XDim%5B0:1:2399%5D;\\/sur_refl_b02%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;\\/sur_refl_b06%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;\\/sur_refl_qc_500m%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;\\/time%5B591:600%5D\"},{\"decoded_constraint\":\"dap4.ce=\\/YDim[0:1:2399];\\/XDim[0:1:2399];\\/sur_refl_b02[591:600][0:1:2399][0:1:2399];\\/sur_refl_b06[591:600][0:1:2399][0:1:2399];\\/sur_refl_qc_500m[591:600][0:1:2399][0:1:2399];\\/time[591:600]\"}]}]" ;
12 June dowload of the same URL:

Code: Select all

// global attributes:
		:CoreMetadata.INVENTORYMETADATA.GROUPTYPE = "MASTERGROUP" ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.REPROCESSINGPLANNED.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.REPROCESSINGPLANNED.VALUE = "\"further update is anticipated\"" ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.REPROCESSINGACTUAL.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.REPROCESSINGACTUAL.VALUE = "\"reprocessed\"" ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.LOCALGRANULEID.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.LOCALGRANULEID.VALUE = "\"MOD09A1.A2000049.h29v13.061.2020041204644.hdf\"" ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.DAYNIGHTFLAG.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.DAYNIGHTFLAG.VALUE = "\"Day\"" ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.PRODUCTIONDATETIME.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.PRODUCTIONDATETIME.VALUE = "\"2020-02-10T20:46:44.000Z\"" ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.LOCALVERSIONID.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.ECSDATAGRANULE.LOCALVERSIONID.VALUE = "\"6.1.4\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.PARAMETERNAME.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.PARAMETERNAME.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.PARAMETERNAME.VALUE = "\"MOD09A1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.AUTOMATICQUALITYFLAG.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.AUTOMATICQUALITYFLAG.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.AUTOMATICQUALITYFLAG.VALUE = "\"Passed\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.AUTOMATICQUALITYFLAGEXPLANATION.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.AUTOMATICQUALITYFLAGEXPLANATION.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.AUTOMATICQUALITYFLAGEXPLANATION.VALUE = "\"Always Passed\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.SCIENCEQUALITYFLAG.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.SCIENCEQUALITYFLAG.VALUE = "\"Not Investigated\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.SCIENCEQUALITYFLAG.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.SCIENCEQUALITYFLAGEXPLANATION.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.SCIENCEQUALITYFLAGEXPLANATION.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QAFLAGS.SCIENCEQUALITYFLAGEXPLANATION.VALUE = "\"See http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/qaFlagPage.cgi?sat=terra&ver=C5 for the product Science Quality status.\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.QAPERCENTINTERPOLATEDDATA.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.QAPERCENTINTERPOLATEDDATA.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.QAPERCENTINTERPOLATEDDATA.VALUE = 0 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.QAPERCENTMISSINGDATA.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.QAPERCENTMISSINGDATA.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.QAPERCENTMISSINGDATA.VALUE = 6 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.QAPERCENTOUTOFBOUNDSDATA.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.QAPERCENTOUTOFBOUNDSDATA.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.MEASUREDPARAMETER.MEASUREDPARAMETERCONTAINER.QASTATS.QAPERCENTOUTOFBOUNDSDATA.VALUE = 0 ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.CLASS = "\"1\"\n\"2\"\n\"3\"\n\"4\"\n\"5\"\n\"6\"" ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.ORBITNUMBER.CLASS = "\"1\"\n\"2\"\n\"3\"\n\"4\"\n\"5\"\n\"6\"" ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.ORBITNUMBER.NUM_VAL = 1, 1, 1, 1, 1, 1 ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.ORBITNUMBER.VALUE = 985, 998, 999, 1000, 1012, 1013 ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.EQUATORCROSSINGLONGITUDE.CLASS = "\"1\"\n\"2\"\n\"3\"\n\"4\"\n\"5\"\n\"6\"" ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.EQUATORCROSSINGLONGITUDE.NUM_VAL = 1, 1, 1, 1, 1, 1 ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.EQUATORCROSSINGLONGITUDE.VALUE = 153.398184366839, -167.974010498891, 167.305176036909, 142.583288767469, -154.076698242606, -178.797472122311 ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.EQUATORCROSSINGTIME.CLASS = "\"1\"\n\"2\"\n\"3\"\n\"4\"\n\"5\"\n\"6\"" ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.EQUATORCROSSINGTIME.NUM_VAL = 1, 1, 1, 1, 1, 1 ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.EQUATORCROSSINGTIME.VALUE = "\"00:31:07.777131\"\n\"21:56:38.804228\"\n\"23:35:31.947770\"\n\"01:14:25.101778\"\n\"21:01:04.120166\"\n\"22:39:57.262173\"" ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.EQUATORCROSSINGDATE.CLASS = "\"1\"\n\"2\"\n\"3\"\n\"4\"\n\"5\"\n\"6\"" ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.EQUATORCROSSINGDATE.NUM_VAL = 1, 1, 1, 1, 1, 1 ;
		:CoreMetadata.INVENTORYMETADATA.ORBITCALCULATEDSPATIALDOMAIN.ORBITCALCULATEDSPATIALDOMAINCONTAINER.EQUATORCROSSINGDATE.VALUE = "\"2000-02-24\"\n\"2000-02-24\"\n\"2000-02-24\"\n\"2000-02-25\"\n\"2000-02-25\"\n\"2000-02-25\"" ;
		:CoreMetadata.INVENTORYMETADATA.COLLECTIONDESCRIPTIONCLASS.SHORTNAME.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.COLLECTIONDESCRIPTIONCLASS.SHORTNAME.VALUE = "\"MOD09A1\"" ;
		:CoreMetadata.INVENTORYMETADATA.COLLECTIONDESCRIPTIONCLASS.VERSIONID.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.COLLECTIONDESCRIPTIONCLASS.VERSIONID.VALUE = 61 ;
		:CoreMetadata.INVENTORYMETADATA.INPUTGRANULE.INPUTPOINTER.NUM_VAL = 100 ;
		:CoreMetadata.INVENTORYMETADATA.INPUTGRANULE.INPUTPOINTER.VALUE = "\"MOD09GQ.A2000055.h29v13.061.2020037172345.hdf\"\n\"MOD09GQ.A2000056.h29v13.061.2020037163254.hdf\"\n\"MOD09GA.A2000055.h29v13.061.2020037172345.hdf\"\n\"MOD09GA.A2000056.h29v13.061.2020037163254.hdf\"" ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRING.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRING.EXCLUSIONGRINGFLAG.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRING.EXCLUSIONGRINGFLAG.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRING.EXCLUSIONGRINGFLAG.VALUE = "\"N\"" ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.GRINGPOINTLONGITUDE.NUM_VAL = 4 ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.GRINGPOINTLONGITUDE.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.GRINGPOINTLONGITUDE.VALUE = 141.806051866371, 143.608159210651, 174.762133749397, -179.080970813846 ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.GRINGPOINTLATITUDE.NUM_VAL = 4 ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.GRINGPOINTLATITUDE.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.GRINGPOINTLATITUDE.VALUE = -53.2212290827783, -39.8744447812904, -37.0807563541566, -49.7487348713794 ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.GRINGPOINTSEQUENCENO.NUM_VAL = 4 ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.GRINGPOINTSEQUENCENO.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.SPATIALDOMAINCONTAINER.HORIZONTALSPATIALDOMAINCONTAINER.GPOLYGON.GPOLYGONCONTAINER.GRINGPOINT.GRINGPOINTSEQUENCENO.VALUE = 1., 2., 3., 4. ;
		:CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEBEGINNINGTIME.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEBEGINNINGTIME.VALUE = "\"00:00:00.000000\"" ;
		:CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEENDINGTIME.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEENDINGTIME.VALUE = "\"23:59:59.000000\"" ;
		:CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEBEGINNINGDATE.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEBEGINNINGDATE.VALUE = "\"2000-02-18\"" ;
		:CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEENDINGDATE.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEENDINGDATE.VALUE = "\"2000-02-25\"" ;
		:CoreMetadata.INVENTORYMETADATA.PGEVERSIONCLASS.PGEVERSION.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.PGEVERSIONCLASS.PGEVERSION.VALUE = "\"6.1.4\"" ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.ASSOCIATEDSENSORSHORTNAME.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.ASSOCIATEDSENSORSHORTNAME.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.ASSOCIATEDSENSORSHORTNAME.VALUE = "\"MODIS\"" ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.ASSOCIATEDPLATFORMSHORTNAME.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.ASSOCIATEDPLATFORMSHORTNAME.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.ASSOCIATEDPLATFORMSHORTNAME.VALUE = "\"Terra\"" ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.ASSOCIATEDINSTRUMENTSHORTNAME.CLASS = "\"1\"" ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.ASSOCIATEDINSTRUMENTSHORTNAME.NUM_VAL = 1 ;
		:CoreMetadata.INVENTORYMETADATA.ASSOCIATEDPLATFORMINSTRUMENTSENSOR.ASSOCIATEDPLATFORMINSTRUMENTSENSORCONTAINER.ASSOCIATEDINSTRUMENTSHORTNAME.VALUE = "\"MODIS\"" ;
		:CoreMetadata.INVENTORYMETADATA.ADDITIONALATTRIBUTES.ADDITIONALATTRIBUTESCONTAINER.CLASS = "\"1\"\n\"2\"\n\"3\"\n\"4\"\n\"5\"\n\"6\"\n\"7\"\n\"8\"\n\"10\"\n\"11\"\n\"12\"\n\"13\"\n\"14\"\n\"15\"\n\"16\"\n\"9\"\n\"17\"\n\"18\"" ;
		:CoreMetadata.INVENTORYMETADATA.ADDITIONALATTRIBUTES.ADDITIONALATTRIBUTESCONTAINER.ADDITIONALATTRIBUTENAME.CLASS = "\"1\"\n\"2\"\n\"3\"\n\"4\"\n\"5\"\n\"6\"\n\"7\"\n\"8\"\n\"10\"\n\"11\"\n\"12\"\n\"13\"\n\"14\"\n\"15\"\n\"16\"\n\"9\"\n\"17\"\n\"18\"" ;
		:CoreMetadata.INVENTORYMETADATA.ADDITIONALATTRIBUTES.ADDITIONALATTRIBUTESCONTAINER.ADDITIONALATTRIBUTENAME.NUM_VAL = 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ;
		:CoreMetadata.INVENTORYMETADATA.ADDITIONALATTRIBUTES.ADDITIONALATTRIBUTESCONTAINER.ADDITIONALATTRIBUTENAME.VALUE = "\"QAPERCENTGOODQUALITY\"\n\"QAPERCENTOTHERQUALITY\"\n\"QAPERCENTNOTPRODUCEDCLOUD\"\n\"QAPERCENTNOTPRODUCEDOTHER\"\n\"HORIZONTALTILENUMBER\"\n\"VERTICALTILENUMBER\"\n\"TileID\"\n\"PROCESSVERSION\"\n\"QAPERCENTPOOROUTPUT500MBAND1\"\n\"QAPERCENTPOOROUTPUT500MBAND2\"\n\"QAPERCENTPOOROUTPUT500MBAND3\"\n\"QAPERCENTPOOROUTPUT500MBAND4\"\n\"QAPERCENTPOOROUTPUT500MBAND5\"\n\"QAPERCENTPOOROUTPUT500MBAND6\"\n\"QAPERCENTPOOROUTPUT500MBAND7\"\n\"RESOLUTIONBANDS1AND2\"\n\"identifier_product_doi\"\n\"identifier_product_doi_authority\"" ;
		:CoreMetadata.INVENTORYMETADATA.ADDITIONALATTRIBUTES.ADDITIONALATTRIBUTESCONTAINER.INFORMATIONCONTENT.CLASS = "\"1\"\n\"2\"\n\"3\"\n\"4\"\n\"5\"\n\"6\"\n\"7\"\n\"8\"\n\"10\"\n\"11\"\n\"12\"\n\"13\"\n\"14\"\n\"15\"\n\"16\"\n\"9\"\n\"17\"\n\"18\"" ;
		:CoreMetadata.INVENTORYMETADATA.ADDITIONALATTRIBUTES.ADDITIONALATTRIBUTESCONTAINER.INFORMATIONCONTENT.PARAMETERVALUE.NUM_VAL = 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 ;
		:CoreMetadata.INVENTORYMETADATA.ADDITIONALATTRIBUTES.ADDITIONALATTRIBUTESCONTAINER.INFORMATIONCONTENT.PARAMETERVALUE.CLASS = "\"1\"\n\"2\"\n\"3\"\n\"4\"\n\"5\"\n\"6\"\n\"7\"\n\"8\"\n\"10\"\n\"11\"\n\"12\"\n\"13\"\n\"14\"\n\"15\"\n\"16\"\n\"9\"\n\"17\"\n\"18\"" ;
		:CoreMetadata.INVENTORYMETADATA.ADDITIONALATTRIBUTES.ADDITIONALATTRIBUTESCONTAINER.INFORMATIONCONTENT.PARAMETERVALUE.VALUE = "\"83\"\n\"5\"\n\"0\"\n\"12\"\n\"29\"\n\"13\"\n\"51029013\"\n\"6.1.4\"\n\"12\"\n\"12\"\n\"0\"\n\"2\"\n\"7\"\n\"1\"\n\"0\"\n\"500\"\n\"10.5067/MODIS/MOD09A1.061\"\n\"https://doi.org\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GROUPTYPE = "MASTERGROUP" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.SPSOPARAMETERS.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.SPSOPARAMETERS.VALUE = "\"2015\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.BOUNDINGRECTANGLE.NORTHBOUNDINGCOORDINATE.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.BOUNDINGRECTANGLE.NORTHBOUNDINGCOORDINATE.VALUE = -39.9999999964079 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.BOUNDINGRECTANGLE.SOUTHBOUNDINGCOORDINATE.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.BOUNDINGRECTANGLE.SOUTHBOUNDINGCOORDINATE.VALUE = -49.9999999955098 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.BOUNDINGRECTANGLE.EASTBOUNDINGCOORDINATE.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.BOUNDINGRECTANGLE.EASTBOUNDINGCOORDINATE.VALUE = 179.999999968633 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.BOUNDINGRECTANGLE.WESTBOUNDINGCOORDINATE.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.BOUNDINGRECTANGLE.WESTBOUNDINGCOORDINATE.VALUE = 143.594801806101 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GEOANYABNORMAL.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GEOANYABNORMAL.VALUE = "\"False\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GEOESTMAXRMSERROR.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GEOESTMAXRMSERROR.VALUE = 50. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.LONGNAME.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.LONGNAME.VALUE = "\"MODIS/Terra Surface Reflectance 8-Day L3 Global 500m SIN Grid\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PROCESSINGCENTER.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PROCESSINGCENTER.VALUE = "\"MODAPS\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.SYSTEMFILENAME.NUM_VAL = 100 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.SYSTEMFILENAME.VALUE = "\"MOD09GQ.A2000055.h29v13.061.2020037172345.hdf\"\n\"MOD09GQ.A2000056.h29v13.061.2020037163254.hdf\"\n\"MOD09GA.A2000055.h29v13.061.2020037172345.hdf\"\n\"MOD09GA.A2000056.h29v13.061.2020037163254.hdf\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.NUMBEROFGRANULES.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.NUMBEROFGRANULES.VALUE = 2 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GRANULEDAYNIGHTFLAG.NUM_VAL = 32 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GRANULEDAYNIGHTFLAG.VALUE = "\"Day\"\n\"Day\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GRANULEDAYOFYEAR.NUM_VAL = 32 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GRANULEDAYOFYEAR.VALUE = "\"55\"\n\"56\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GRANULEBEGINNINGDATETIME.NUM_VAL = 32 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GRANULEBEGINNINGDATETIME.VALUE = "\"2000-02-24T00:00:00Z\"\n\"2000-02-25T00:00:00Z\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GRANULEENDINGDATETIME.NUM_VAL = 32 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GRANULEENDINGDATETIME.VALUE = "\"2000-02-24T23:59:59Z\"\n\"2000-02-25T23:59:59Z\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.NUMBEROFORBITS.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.NUMBEROFORBITS.VALUE = 6 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.CHARACTERISTICBINANGULARSIZE250M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.CHARACTERISTICBINANGULARSIZE250M.VALUE = 7.5 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.CHARACTERISTICBINSIZE250M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.CHARACTERISTICBINSIZE250M.VALUE = 231.656358263889 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DATACOLUMNS250M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DATACOLUMNS250M.VALUE = 4800 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DATAROWS250M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DATAROWS250M.VALUE = 4800 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GLOBALGRIDCOLUMNS250M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GLOBALGRIDCOLUMNS250M.VALUE = 172800 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GLOBALGRIDROWS250M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GLOBALGRIDROWS250M.VALUE = 86400 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.NADIRDATARESOLUTION250M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.NADIRDATARESOLUTION250M.VALUE = "\"250m\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.CHARACTERISTICBINANGULARSIZE500M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.CHARACTERISTICBINANGULARSIZE500M.VALUE = 15. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.CHARACTERISTICBINSIZE500M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.CHARACTERISTICBINSIZE500M.VALUE = 463.312716527778 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DATACOLUMNS500M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DATACOLUMNS500M.VALUE = 2400 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DATAROWS500M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DATAROWS500M.VALUE = 2400 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GLOBALGRIDCOLUMNS500M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GLOBALGRIDCOLUMNS500M.VALUE = 86400 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GLOBALGRIDROWS500M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.GLOBALGRIDROWS500M.VALUE = 43200 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.NADIRDATARESOLUTION500M.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.NADIRDATARESOLUTION500M.VALUE = "\"500m\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND3.NUM_VAL = 16 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND3.VALUE = 88., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 7., 6. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND4.NUM_VAL = 16 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND4.VALUE = 86., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 2., 7., 6. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND5.NUM_VAL = 16 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND5.VALUE = 70., 0., 0., 0., 0., 0., 0., 5., 4., 0., 0., 0., 0., 7., 9., 6. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND6.NUM_VAL = 16 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND6.VALUE = 79., 0., 0., 0., 0., 0., 0., 0., 9., 0., 0., 0., 0., 1., 6., 6. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND7.NUM_VAL = 16 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND7.VALUE = 83., 0., 0., 0., 0., 0., 0., 0., 5., 0., 0., 0., 0., 0., 7., 6. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTPROCESSED.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTPROCESSED.VALUE = 96 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTLAND.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTLAND.VALUE = 4 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTCLOUDY.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTCLOUDY.VALUE = 72 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTSHADOW.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTSHADOW.VALUE = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTLOWSUN.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTLOWSUN.VALUE = 0 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND1.NUM_VAL = 16 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND1.VALUE = 76., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 12., 7., 6. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND2.NUM_VAL = 16 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.QUALITYCLASSPERCENTAGE500MBAND2.VALUE = 76., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 12., 7., 6. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTLANDSEAMASKCLASS.NUM_VAL = 8 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PERCENTLANDSEAMASKCLASS.VALUE = 6., 4., 1., 0., 0., 0., 4., 85. ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PROCESSINGENVIRONMENT.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PROCESSINGENVIRONMENT.VALUE = "\"Linux minion7182 3.10.0-1062.9.1.el7.x86_64 #1 SMP Fri Dec 6 15:49:49 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DESCRREVISION.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.DESCRREVISION.VALUE = "\"6.1\"" ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PRODUCTIONHISTORY.NUM_VAL = 1 ;
		:ArchiveMetadata.ARCHIVEDMETADATA.PRODUCTIONHISTORY.VALUE = "\"PGE21:6.1.4;ProductionHistory not read\"" ;
		:HDFEOSVersion = "HDFEOS_V2.19" ;
		:identifier_product_doi = "10.5067/MODIS/MOD09A1.061" ;
		:identifier_product_doi_authority = "https://doi.org" ;
		:history = "2024-06-12 02:36:38 GMT hyrax-1.16.7 https://opendap.cr.usgs.gov/opendap/hyrax/MOD09A1.061/h29v13.ncml.dap.nc4?dap4.ce=/YDim%5B0:1:2399%5D;/XDim%5B0:1:2399%5D;/sur_refl_b02%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;/sur_refl_b06%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;/sur_refl_qc_500m%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;/time%5B591:600%5D\n" ;
		:history_json = "[{\"$schema\":\"https:\\/\\/harmony.earthdata.nasa.gov\\/schemas\\/history\\/0.1.0\\/history-0.1.0.json\",\"date_time\":\"2024-06-12T02:36:38.367+0000\",\"program\":\"hyrax\",\"version\":\"1.16.7\",\"parameters\":[{\"request_url\":\"https:\\/\\/opendap.cr.usgs.gov\\/opendap\\/hyrax\\/MOD09A1.061\\/h29v13.ncml.dap.nc4?dap4.ce=\\/YDim%5B0:1:2399%5D;\\/XDim%5B0:1:2399%5D;\\/sur_refl_b02%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;\\/sur_refl_b06%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;\\/sur_refl_qc_500m%5B591:600%5D%5B0:1:2399%5D%5B0:1:2399%5D;\\/time%5B591:600%5D\"},{\"decoded_constraint\":\"dap4.ce=\\/YDim[0:1:2399];\\/XDim[0:1:2399];\\/sur_refl_b02[591:600][0:1:2399][0:1:2399];\\/sur_refl_b06[591:600][0:1:2399][0:1:2399];\\/sur_refl_qc_500m[591:600][0:1:2399][0:1:2399];\\/time[591:600]\"}]}]" ;

Re: CoreMetadata and ArchiveMetadata attributes for OPeNDAP MODIS downloads

Posted: Mon Sep 09, 2024 3:11 pm America/New_York
by LP DAAC - afriesz
Hey @timothy.w.hilton,

I'm still gathering information on the absence of the metadata fields in OPeNDAP. I have a couple questions for you. Are you accessing OPeNDAP programmatically or through the interface? Also, what metadata fields are you extracting from the CoreMetadata and ArchiveMetadata groups?

Re: CoreMetadata and ArchiveMetadata attributes for OPeNDAP MODIS downloads

Posted: Mon Sep 09, 2024 7:11 pm America/New_York
by timothy.w.hilton
Thanks for looking into this @afriesz!
Are you accessing OPeNDAP programmatically or through the interface?
I am getting this result for accessing OPeNDAP programmatically (python3, using the requests package), through the web interface, or by pasting the URL into my browser.
what metadata fields are you extracting from the CoreMetadata and ArchiveMetadata groups?
ArchiveMetadata.ARCHIVEDMETADATA.PERCENTCLOUDY
CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEBEGINNINGDATE
CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEBEGINNINGTIME
CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEENDINGDATE
CoreMetadata.INVENTORYMETADATA.RANGEDATETIME.RANGEENDINGTIME

Re: CoreMetadata and ArchiveMetadata attributes for OPeNDAP MODIS downloads

Posted: Thu Oct 24, 2024 10:36 am America/New_York
by LP DAAC - afriesz
Sorry for the delay. Unfortunately, the behavior you've identified with OPeNDAP is a result of a configuration change we had to recently make to our OPeNDAP servers. The change was done to fix access issues for several popular MODIS datasets via OPeNDAP. I've taken a look at other options for getting the metadata information you're interested in. Currently, CMR is the only option for retrieving specific metadata (date and time information) via the CMR API, but percent cloud data is unfortunately not available for the MODIS data; however, we're investigating this. Another potential solution is actively being developed within NASA's Earthdata Cloud to expose file metadata for MODIS HDF-EOS files, and we'll post updates here when/if that becomes a viable option.
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