@prefix dcat: . @prefix dct: . @prefix foaf: . @prefix org: . @prefix skos: . @prefix vcard: . @prefix xsd: . a dcat:Dataset ; dct:description """The Aqua MODIS (Moderate resolution Imaging Spectroradiometer) Level-1B (L1B) product includes calibrated and geolocated at-aperture radiances for 36 bands generated from MODIS Level-1A raw sensor counts. The radiances are provided in watts/m2/micrometer/steradian. The Aqua MODIS L1B product is a set three datasets (MYD02QKM, MYD02HKM, and MYD021KM) that are produced to address the three spatial-resolution variations: 250 m, 500 m, and 1000 m. This landing page describes the quarter-kilometer product with a short-name MYD02QKM. It provides calibrated radiances derived from the 250-m at-nadir visible band-1 and near-infrared band-2 that have central wavelengths at 0.645 µm and 0.858 µm, respectively. Each 250-m band has 40 detectors in the along-track direction. The MYD02QKM product contains the following two Science Data Sets (SDS) besides geolocation fields for latitude and longitude, quality flags, error estimates, etc.

SDS Variable	Long-name
EV_250_RefSB	Earth View 250M Reflective Solar Bands Scaled Integers
EV_250_RefSB_Uncert_Indexes	Earth View 250M Reflective Solar Bands Uncertainty Indexes

The v7.0 Aqua MODIS MYD02QKM in netCDF4 format represents the most current version of this product that has undergone around half-a-dozen reprocessing cycles in the last 2.5 decades. Each 250-m swath granule or data-file temporally spans 5 minutes and its image dimensions measure 8,120 lines (along-track direction) by 5,416 samples (cross-track direction). The v7.0 collection’s data record starts from July 4, 2002 (2002–185). Consult the MODIS L1B User Guide to understand how to convert the per-pixel scaled integers to radiance or reflectance.""" ; dct:identifier "10.5067/MODIS/MYD02QKM.007" ; dct:issued "2026-06-03T00:04:22.744084"^^xsd:dateTime ; dct:modified "2026-11-02T22:16:00+00:00"^^xsd:dateTime ; dct:publisher ; dct:spatial [ a dct:Location ] ; dct:title "MODIS/Aqua Calibrated Radiances 5-Min L1B Swath 250m V7" ; dcat:contactPoint [ a vcard:Organization ; vcard:fn "Earthdata Forum" ; vcard:hasEmail ] ; dcat:distribution , , , , ; dcat:keyword "earth-science-infrared-wavelengths-spectral-engineering-infrared-radiance", "earth-science-infrared-wavelengths-spectral-engineering-reflected-infrared", "earth-science-visible-wavelengths-spectral-engineering-visible-radiance" ; dcat:theme <%7B%22Earth%20Science%22%7D> . a dcat:Distribution ; dct:description "The metadata's original source." ; dct:format "ISO" ; dct:identifier "0afe7ef2-3c12-4a01-a5e6-bfd90a6e3519" ; dct:issued "2026-06-03T00:04:22.746181"^^xsd:dateTime ; dct:modified "2026-06-03T00:04:22.719506"^^xsd:dateTime ; dct:title "Original Metadata" ; dcat:accessURL ; dcat:mediaType "text/xml" . a dcat:Distribution ; dct:format "PDF" ; dct:identifier "6629d2c5-8faa-4dd7-a08c-bf63b203d35c" ; dct:issued "2026-06-03T00:04:22.746176"^^xsd:dateTime ; dct:modified "2026-06-03T00:04:22.718341"^^xsd:dateTime ; dcat:accessURL ; dcat:mediaType "application/pdf" . a dcat:Distribution ; dct:format "BIN" ; dct:identifier "68fc22be-9fa4-4d35-abfd-fdb499d00a1b" ; dct:issued "2026-06-03T00:04:22.746173"^^xsd:dateTime ; dct:modified "2026-06-03T00:04:22.712860"^^xsd:dateTime ; dcat:accessURL ; dcat:mediaType "application/octet-stream" . a dcat:Distribution ; dct:format "PDF" ; dct:identifier "9c613963-de62-45ec-a6d0-e126385af6ae" ; dct:issued "2026-06-03T00:04:22.746164"^^xsd:dateTime ; dct:modified "2026-06-03T00:04:22.711580"^^xsd:dateTime ; dcat:accessURL ; dcat:mediaType "application/pdf" . a dcat:Distribution ; dct:format "BIN" ; dct:identifier "f898c9c6-b98e-40e8-bc55-abd9f20a8d0e" ; dct:issued "2026-06-03T00:04:22.746179"^^xsd:dateTime ; dct:modified "2026-06-03T00:04:22.719277"^^xsd:dateTime ; dcat:accessURL ; dcat:mediaType "application/octet-stream" . a org:Organization ; skos:prefLabel "NASA" ; foaf:name "NASA" .