Attributes { granule_flag { String long_name "granule processing label"; String flag_meanings "is_first_granule_of_scan is_last_granule_of_scan is_telemetry_only scan_seq_start"; Int32 flag_masks 1, 2, 4, 8; } mirror_step { String long_name "scan mirror position index"; } time { String standard_name "time"; String long_name "exposure start time"; String calendar "gregorian"; String units "seconds since 1980-01-06T00:00:00Z"; } exposure_time { String units "seconds"; String long_name "exposure duration"; Float32 valid_min 0.00000000; Float32 _FillValue 9.96920997e+36; Float32 valid_max 300.000000; } earth_sun_distance { String units "m"; String long_name "Earth-sun distance"; } east_ref_sat_ID { String comment "The ID of reference satellite used in the East, 0 indicating no reference satellite is used from the East slot"; } west_ref_sat_ID { String comment "The ID of reference satellite used in the West, 0 indicating no reference satellite is used from the West slot"; } VIIRS_registration_status { Int16 _FillValue -127; String comment "twilight registration status fail=0 success=1"; } VIIRS_product_name { String comment "VIIRS product used for registration and collocated radiances"; } NC_GLOBAL { String time_reference "1980-01-06T00:00:00Z"; Int32 format_version 2; String product_type "RADT"; String sdpc_version "TEMPO_SDPC_v4.8.3"; Int32 scan_num 18; Int32 granule_num 3; Int32 processing_version 4; Int32 scan_type 3; String time_coverage_start "2026-04-30T01:39:37Z"; String time_coverage_end "2026-04-30T01:52:08Z"; Float64 time_coverage_start_since_epoch 1461548395.957442; Float64 time_coverage_end_since_epoch 1461549146.310597; String production_date_time "2026-04-30T02:11:07Z"; Int32 version_id 4; String pge_version "0.1.0"; String shortname "TEMPO_RADT_L1"; String begin_date "2026-04-30"; String begin_time "01:39:37"; String end_date "2026-04-30"; String end_time "01:52:08"; String inr_status "2"; String processing_level "1"; String history "2026-04-30T02:11:14Z: /proj/sdpc_soft/install/gnu-rocky8/sdpc/v4p8p3/bin/L0_ccd -vv --Version 4 --config l0_ccd_drk.cfg -i @hk.lis --solar /proj/sdpc_archive/temposdpc/ops5/L1/IRR/D16908/20260423T040511Z/TEMPO_IRR_L1_V04_20260423T040511Z.nc --trend trend_params.nc -d /proj/sdpc_archive/temposdpc/ops5/L1/DRK/D16915/20260429T095813Z/TEMPO_DRK_L1_V04_20260429T095813Z.nc -o TEMPO_RADT_L1_V04_20260430T013937Z_S018G03.nc TEMPO_RADT_L0_V01_20260430T013937Z_S018G03.nc 2026-04-30T02:13:01Z: /proj/sdpc_soft/install/gnu-rocky8/sdpc/v4p8p3/bin/L1_inr_prep -v 1 -i /proj/sdpc_archive/ancillary/var/iers/files/bulletina_2026113_xxxix_017.txt TEMPO_RADT_L1_V04_20260430T013937Z_S018G03.nc 2026-04-30T02:18:15Z: /proj/sdpc_soft/install/gnu-rocky8/sdpc/v4p8p3/bin/L1_inr_post -vv -c /proj/sdpc/liveroot/temposdpc/ops5/etc/l1_inr_post.cfg -s /proj/sdpc_archive/ancillary/var/ims/2026/ims2026119_1km_v1.3.nc TEMPO_RADT_L1_V04_20260430T013937Z_S018G03.nc "; String input_files "TEMPO_RADT_L0_V01_20260430T013937Z_S018G03.nc", "TEMPO_HK_L0_V01_20260430T013411Z.nc", "TEMPO_HK_L0_V01_20260430T013841Z.nc", "TEMPO_HK_L0_V01_20260430T014311Z.nc", "TEMPO_HK_L0_V01_20260430T014753Z.nc", "TEMPO_IRR_L1_V04_20260423T040511Z.nc", "TEMPO_DRK_L1_V04_20260429T095813Z.nc", "TEMPO_SMC_L0_V01_20260430T013540Z.nc", "TEMPO_SMC_L0_V01_20260430T014038Z.nc", "TEMPO_SMC_L0_V01_20260430T014441Z.nc", "TEMPO_SMC_L0_V01_20260430T014938Z.nc", "TEMPO_IRU_L0_V01_20260430T013509Z.nc", "TEMPO_IRU_L0_V01_20260430T013925Z.nc", "TEMPO_IRU_L0_V01_20260430T014341Z.nc", "TEMPO_IRU_L0_V01_20260430T014741Z.nc", "TEMPO_IRU_L0_V01_20260430T015156Z.nc"; String local_granule_id "TEMPO_RADT_L1_V04_20260430T013937Z_S018G03.nc"; String Conventions "CF-1.6, ACDD-1.3"; String day_of_year "Attribute elided: Unsupported attribute type (NC_INT64)"; String project "TEMPO"; String platform "Intelsat 40e"; String source "UV-VIS hyperspectral imaging"; String institution "Smithsonian Astrophysical Observatory"; String creator_url "http://tempo.si.edu"; String title "TEMPO Level 1 twilight radiance measurement"; String collection_shortname "TEMPO_RADT_L1"; String collection_version "Attribute elided: Unsupported attribute type (NC_INT64)"; String keywords "EARTH SCIENCE>SPECTRAL/ENGINEERING>VISIBLE WAVELENGTHS>VISIBLE RADIANCE, EARTH SCIENCE>SPECTRAL/ENGINEERING>ULTRAVIOLET WAVELENGTHS>ULTRAVIOLET RADIANCE"; String summary "Level 1 twilight radiance files provide radiance measured during twilight hours to capture city lights at TEMPO\342\200\231s native spatial resolution, ~10 km^2 at the center of the Field of Regard (FOR), for individual granules. Each granule covers the entire North-South TEMPO FOR but only a portion of the East-West FOR. The files are provided in netCDF4 format, and contain information on radiometrically calibrated and geolocated radiances for the UV and visible bands, corresponding noise, geolocation, viewing geometry, quality flags and other ancillary information. The product is produced using the L0-1b processor which includes image processing steps to produce radiometrically calibrated radiances with nominal navigation. Please refer to the ATBD for details."; String coremetadata " GROUP = INVENTORYMETADATA GROUPTYPE = MASTERGROUP GROUP = ECSDATAGRANULE OBJECT = LOCALGRANULEID NUM_VAL = 1 VALUE = \"TEMPO_RADT_L1_V04_20260430T013937Z_S018G03.nc\" END_OBJECT = LOCALGRANULEID OBJECT = LOCALVERSIONID NUM_VAL = 1 VALUE = (\"RFC1321 MD5 = not yet calculated\") END_OBJECT = LOCALVERSIONID OBJECT = PRODUCTIONDATETIME NUM_VAL = 1 VALUE = \"2026-04-30T02:11:07Z\" END_OBJECT = PRODUCTIONDATETIME END_GROUP = ECSDATAGRANULE GROUP = COLLECTIONDESCRIPTIONCLASS OBJECT = SHORTNAME NUM_VAL = 1 VALUE = \"TEMPO_RADT_L1\" END_OBJECT = SHORTNAME OBJECT = VERSIONID NUM_VAL = 1 VALUE = 4 END_OBJECT = VERSIONID END_GROUP = COLLECTIONDESCRIPTIONCLASS GROUP = INPUTGRANULE OBJECT = INPUTPOINTER NUM_VAL = 16 VALUE = (\"TEMPO_RADT_L0_V01_20260430T013937Z_S018G03.nc\", \"TEMPO_HK_L0_V01_20260430T013411Z.nc\", \"TEMPO_HK_L0_V01_20260430T013841Z.nc\", \"TEMPO_HK_L0_V01_20260430T014311Z.nc\", \"TEMPO_HK_L0_V01_20260430T014753Z.nc\", \"TEMPO_IRR_L1_V04_20260423T040511Z.nc\", \"TEMPO_DRK_L1_V04_20260429T095813Z.nc\", \"TEMPO_SMC_L0_V01_20260430T013540Z.nc\", \"TEMPO_SMC_L0_V01_20260430T014038Z.nc\", \"TEMPO_SMC_L0_V01_20260430T014441Z.nc\", \"TEMPO_SMC_L0_V01_20260430T014938Z.nc\", \"TEMPO_IRU_L0_V01_20260430T013509Z.nc\", \"TEMPO_IRU_L0_V01_20260430T013925Z.nc\", \"TEMPO_IRU_L0_V01_20260430T014341Z.nc\", \"TEMPO_IRU_L0_V01_20260430T014741Z.nc\", \"TEMPO_IRU_L0_V01_20260430T015156Z.nc\") END_OBJECT = INPUTPOINTER END_GROUP = INPUTGRANULE GROUP = SPATIALDOMAINCONTAINER GROUP = HORIZONTALSPATIALDOMAINCONTAINER GROUP = GPOLYGON OBJECT = GPOLYGONCONTAINER CLASS = \"1\" GROUP = GRINGPOINT CLASS = \"1\" OBJECT = GRINGPOINTLONGITUDE NUM_VAL = 16 CLASS = \"1\" VALUE = (-103.1601, -101.8283, -100.6888, -99.7562, -98.9429, -98.3345, -97.8363, -97.4732, -97.2139, -92.0848, -92.1102, -92.2956, -92.6113, -93.0675, -103.1221, -103.1601) END_OBJECT = GRINGPOINTLONGITUDE OBJECT = GRINGPOINTLATITUDE NUM_VAL = 16 CLASS = \"1\" VALUE = (57.8383, 53.8585, 49.4598, 44.8112, 39.5318, 34.3516, 28.7184, 23.0695, 17.2029, 17.186, 26.9644, 38.7695, 48.9757, 57.6206, 57.8538, 57.8383) END_OBJECT = GRINGPOINTLATITUDE OBJECT = GRINGPOINTSEQUENCENO NUM_VAL = 16 CLASS = \"1\" VALUE = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16) END_OBJECT = GRINGPOINTSEQUENCENO END_GROUP = GRINGPOINT GROUP = GRING CLASS = \"1\" OBJECT = EXCLUSIONGRINGFLAG NUM_VAL = 1 VALUE = \"N\" CLASS = \"1\" END_OBJECT = EXCLUSIONGRINGFLAG END_GROUP = GRING END_OBJECT = GPOLYGONCONTAINER END_GROUP = GPOLYGON END_GROUP = HORIZONTALSPATIALDOMAINCONTAINER END_GROUP = SPATIALDOMAINCONTAINER GROUP = RANGEDATETIME OBJECT = RANGEENDINGDATE NUM_VAL = 1 VALUE = \"2026-04-30\" END_OBJECT = RANGEENDINGDATE OBJECT = RANGEENDINGTIME NUM_VAL = 1 VALUE = \"01:52:08\" END_OBJECT = RANGEENDINGTIME OBJECT = RANGEBEGINNINGDATE NUM_VAL = 1 VALUE = \"2026-04-30\" END_OBJECT = RANGEBEGINNINGDATE OBJECT = RANGEBEGINNINGTIME NUM_VAL = 1 VALUE = \"01:39:37\" END_OBJECT = RANGEBEGINNINGTIME END_GROUP = RANGEDATETIME GROUP = PGEVERSIONCLASS OBJECT = PGEVERSION NUM_VAL = 1 VALUE = \"0.1.0\" END_OBJECT = PGEVERSION END_GROUP = PGEVERSIONCLASS END_GROUP = INVENTORYMETADATA END "; String geospatial_bounds "POLYGON((57.8383 -103.1601,53.8585 -101.8283,49.4598 -100.6888,44.8112 -99.7562,39.5318 -98.9429,34.3516 -98.3345,28.7184 -97.8363,23.0695 -97.4732,17.2029 -97.2139,17.1860 -92.0848,26.9644 -92.1102,38.7695 -92.2956,48.9757 -92.6113,57.6206 -93.0675,57.8538 -103.1221,57.8383 -103.1601))"; String geospatial_bounds_crs "EPSG:4326"; Float32 geospatial_lon_min -103.160126; Float32 geospatial_lon_max -92.0847778; Float32 geospatial_lat_min 17.1859951; Float32 geospatial_lat_max 57.8537827; } }