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OAS accession Detail for 0075438
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| accessions_id: | 0075438 | archive |
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| Title: | N-19 AVHRR GAC L2P swath SST data set for 2010-02-15 (NODC Accession 0075438) |
| Abstract: | A global Group for High Resolution Sea Surface Temperature (GHRSST) Level 2P dataset based on multi-channel sea surface temperature (SST) retrievals generated in real-time from the Advanced Very High Resolution Radiometer (AVHRR) on the NOAA-19 platform (launched 6 Feb 2009) produced and used operationally in oceanographic analyses and forecasts by the US Naval Oceanographic Office (NAVO). The AVHRR is a space-borne scanning sensor on the National Oceanic and Atmospheric Administration (NOAA) family of Polar Orbiting Environmental Satellites (POES) having a operational legacy that traces back to the Television Infrared Observation Satellite-N (TIROS-N) launched in 1978. AVHRR instruments measure the radiance of the Earth in 5 (or 6) relatively wide spectral bands. The first two are centered around the red (0.6 micrometer) and near-infrared (0.9 micrometer) regions, the third one is located around 3.5 micrometer, and the last two sample the emitted thermal radiation, around 11 and 12 micrometers, respectively. The legacy 5 band instrument is known as AVHRR/2 while the more recent version, the AVHRR/3 (first carried on the NOAA-15 platform), acquires data in a 6th channel located at 1.6 micrometer. Typically the 11 and 12 micron channels are used to derive SST sometimes in combination with the 3.5 micron channel. The NOAA platforms are sun synchronous generally viewing the same earth location twice a day (latitude dependent) due to the relatively large AVHRR swath of approximately 2400 km. The highest ground resolution that can be obtained from the current AVHRR instruments is 1.1 km at nadir. AVHRR data are acquired in three formats: High Resolution Picture Transmission (HRPT), Local Area Coverage (LAC), and Global Area Coverage (GAC). HRPT data are full resolution image data transmitted to a ground stations as they are collected. LAC are also full resolution data, but the acquisition is prescheduled and recorded with an on-board tape recorder for subsequent transmission during a station overpass. This particular dataset is produced from GAC data that are derived from an on-board sample averaging of the full resolution global AVHRR data. Four out of every five samples along the scan line are used to compute on average value and the data from only every third scan line are processed, yielding an effective 4 km resolution at nadir. Further binning and averaging of these pixels results in a final dataset resolution of 8.8 km. |
| Date received: | 20130702 |
| Start date: | 20100215 |
| End date: | 20100215 |
| Seanames: | World-Wide Distribution |
| West boundary: | -180 |
| East boundary: | 180 |
| North boundary: | 89.962 |
| South boundary: | -89.895 |
| Observation types: | satellite data |
| Instrument types: | AVHRR-3 |
| Datatypes: | SEA SURFACE TEMPERATURE |
| Submitter: | Armstrong, Edward M. |
| Submitting institution: | US NASA; Jet Propulsion Laboratory; Physical Oceanography Distributed Active Archive Center |
| Collecting institutions: | US Navy; Naval Oceanographic Office |
| Contributing projects: | GHRSST |
| Platforms: | NOAA-19 (33Y9) |
| Number of observations: | |
| Supplementary information: | Entry ID: NAVO-L2P-AVHRR19_G Projection_Information: Projection Type: Satellite native swath Ellipsoid_Type: WGS 84 Other Projection Details: Geolocation information included for each pixel Data Resolution: Latitude resolution: 0.0791651673263764 Longitude resolution: 0.0791651673263764 The temporal resolution: Revisit ~twice each day (night and daytime passes) This metadata record was generated from an original data set description (DSD) record in DIF format: http://www.ghrsst.org Reference: none Sources: NOAA-19 National Oceanic & Atmospheric Administration-19 Sensors: AVHRR-3 Advanced Very High Resolution Radiometer-3 In this accession, NODC has archived multiple versions of these data. The latest (and best) version of these data has the largest version number. |
| Availability date: | |
| Metadata version: | 3 |
| Keydate: | 2011-09-02 14:00:45+00 |
| Editdate: | 2015-02-06 15:34:32+00 |