Observation Instance

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{
    "ob_id": 44706,
    "uuid": "d43fc038423246f6b5d077ad034f04cd",
    "title": "ESA Land Surface Temperature Climate Change Initiative (LST_cci): Daily land surface temperature from AVHRR-3 (Advanced Very High Resolution Radiometer-3) on NOAA-18  (National Oceanic and Atmospheric Administration), level 3 collated (L3C) global product (2005-2020), version 1.50",
    "abstract": "This dataset contains land surface temperatures (LSTs) and their uncertainty estimates from the Advanced Very High Resolution Radiometer-3 (AVHRR-3) on NOAA-18. Satellite land surface temperatures are skin temperatures, which means, for example, the temperature of the ground surface in bare soil areas, the temperature of the canopy over forests, and a mix of the soil and leaf temperature over sparse vegetation. The skin temperature is an important variable when considering surface fluxes of, for instance, heat and water.\r\n\r\nSeparate files are provided for temperatures retrieved from descending and ascending orbits. Descending and ascending equator crossing times were originally 01:30 and 13:30 local solar time but have been allowed to drift.\r\nThis product includes a time correction which can be added to the observed LST to correct to a consistent overpass time.\r\n\r\nPer pixel uncertainty estimates are given in two forms, first, an estimate of the total uncertainty for the pixel and second, a breakdown of the uncertainty into components by correlation length. Also provided in the files, on a per pixel basis, are the observation time, the satellite viewing and solar geometry angles, a quality flag, and land cover class.\r\n\r\nThe dataset coverage is global over the land surface. LSTs are provided on a global equal angle grid at a resolution of 0.05° longitude and 0.05° latitude. AVHRR achieves full Earth coverage twice per day. LSTs are not produced where clouds are present since under these circumstances the IR radiometer observes the cloud top which is usually much colder than the surface.\r\n\r\nDataset coverage starts on 5th June 2005 and continues to 17th September 2020. There are minor interruptions (1-10 days) during satellite/instrument maintenance periods or instrument anomalies.\r\n\r\nThe dataset was produced by the University of Leicester (UoL) and LSTs were retrieved using a two channel Generalised Split Window retrieval algorithm and data were processed in the UoL processing chain.",
    "keywords": "land surface temperature, ESA, CCI, AVHRR-3, NOAA-18",
    "publicationState": "citable",
    "dataPublishedTime": "2026-02-13T17:33:31",
    "doiPublishedTime": "2026-02-13T17:36:01",
    "updateFrequency": "notPlanned",
    "status": "completed",
    "result_field": {
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        "dataPath": "/neodc/esacci/land_surface_temperature/data/NOAA18_AVHRR/L3C/0.05/v1.50/daily/",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 732690930226,
        "numberOfFiles": 11163,
        "fileFormat": "Data are in NetCDF format"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/12576/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/2896/?format=api",
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    "dataLineage": "The AVHRR L1C FCDR data produced by the ESA CCI SST project were used as inputs. These data are processed by the University of Leicester: data are reformatted then processed to LSTs on an orbit swath, regridded to an equal angle grid, and collated to daily ascending and descending products at Level 3C.\r\n\r\nContact: data.lst-cci@acri-st.fr",
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    "language": "English",
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