[Location: Location_Category='GEOGRAPHIC REGION', Location_Type='GLOBAL']
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GHRSST Level 2P Global Bulk Sea Surface Temperature from the Advanced Very High Resolution Radiometer (AVHRR) on the NOAA-18 satellite produced by NAVO Entry ID: NAVO-L2P-AVHRR18_G |
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Summary
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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-18 platform (launched 20 May 2005) 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.
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Related URL
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Link:
GET DATA
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THREDDS DIRECTORY
Description: Data may be directly downloaded from the NODC via the THREDDS (Thematic Real-time Environmental Distributed Data Services) server at the URL listed in this metadata record. For more information see the NODC GHRSST project web site: URL: http://ghrsst.nodc.noaa.gov/ Link: GET DATA > OPENDAP DIRECTORY (DODS) Description: These data are also served using OPeNDAP (formerly DODS) server. The base URL is: http://data.nodc.noaa.gov/opendap/ghrsst/. For more information see the NODC GHRSST project web site: URL:http://ghrsst.nodc.noaa.gov/. For a listing of OPeNDAP clients which may be used to access OPeNDAP-enabled data sets, please see the OPeNDAP web site at URL: http://opendap.org/ Link: GET DATA Description: Direct FTP access: Navigate to ftp://ftp.nodc.noaa.gov/pub/data.nodc/ghrsst using any FTP client to begin downloading data. For more information see the NODC GHRSST project web site: URL: http://ghrsst.nodc.noaa.gov/ Link: GET DATA Description: Simple Web access: Using any web browser, navigate to URL: http://data.nodc.noaa.gov/ghrsst and begin browsing through the file hierarchy. Clicking on any of the files will prompt you to download that file or will launch any application associated with netCDF files. For more information see the NODC GHRSST project web site: URL: http://ghrsst.nodc.noaa.gov/ Link: GET DATA Description: Data may be directly downloaded through the NODC Ocean Archive System at: URL: http://www.nodc.noaa.gov/Archive/Search/. NODC can be contacted directly for custom orders. (When requesting data from the NODC, a data set may be referred to by a 7-digit accession number assigned to individual data sets, see the NODC Ocean Archive System at http://www.nodc.noaa.gov/Archive/Search/.) For more information see the NODC GHRSST project web site: URL: http://ghrsst.nodc.noaa.gov/ |
Geographic Coverage
| N: 80.0 | S: -70.0 | E: 180.0 | W: -180.0 |
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Data Set Citation
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Dataset Originator/Creator:
Naval Oceanographic Office
Dataset Title: N-18 AVHRR GAC L2P swath SST data set Dataset Series Name: N-18 AVHRR GAC MCSST Dataset Release Date: 2005-12-23 Dataset Release Place: Stennis Space Center, MS, USA Dataset Publisher: Naval Oceanographic Office Version: 1.0 Other Citation Details: Production of L2P data is sponsored partly by the NOPP Online Resource: none |
Temporal Coverage
| Start Date: 2006-01-25 |
Location Keywords
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GEOGRAPHIC REGION
> GLOBAL
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Data Resolution
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Temporal Resolution:
Twice daily (nominally)
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Science Keywords
| OCEANS >OCEAN TEMPERATURE >SEA SURFACE TEMPERATURE >BULK SEA SURFACE TEMPERATURE [Definition] |
ISO Topic Category
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OCEANS
GEOSCIENTIFIC INFORMATION |
Platform
| NOAA-18 >National Oceanic & Atmospheric Administration-18 [Information] |
Instrument
| AVHRR-3 >Advanced Very High Resolution Radiometer-3 [Information] |
Project
| GHRSST >Group for High Resolution Sea Surface Temperature [Information] |
| CWIC >CEOS WGISS Integrated Catalog [Information] |
Access Constraints
| None |
Use Constraints
| None |
Keywords
| SEA SURFACE TEMPERATURE |
| AVHRR > Advanced Very High Resolution Radiometer |
| AVHRR-GAC |
| satellite data |
| NOAA-18 SATELLITE |
| Group for High Resolution Sea Surface Temperature |
| US NAVY; NAVAL OCEANOGRAPHIC OFFICE |
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US NATIONAL AERONAUTIC AND SPACE ADMINISTRATION; JET PROPULSION LABORATORY Physical Oceanography Distributed Active Archive Center |
| Earth Science |
| Oceans |
| Ocean Temperature |
| Sea Surface Temperature |
| climatologyMeteorologyAtmosphere |
| oceans |
| environment |
| biota |
| World-Wide Distribution |
| Global Ocean |
| Global |
Originating Center
| Naval Oceanographic Office |
Data Center
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National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce
[Information]
Data Center URL: http://www.nodc.noaa.gov/
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Oceanography Division, Naval Research Laboratory, U.S. Navy, U. S. Department of Defense
[Information]
Data Center URL: http://www7300.nrlssc.navy.mil/ Dataset ID: AVHRR18_G
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Personnel
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KENNETH
S.
CASEY Role: TECHNICAL CONTACT Phone: (301) 713-3272 x133 Fax: FAX: (301) 713-3300 Email: Kenneth.Casey at noaa.gov Contact Address: NOAA National Oceanographic Data Center SSMC3, 4th Floor, Room 4853, Route: E/OC1 1315 East-West Highway City: Silver Spring Province or State: Maryland Postal Code: 20910 Country: U.S.A. |
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DOUG
MAY Role: TECHNICAL CONTACT Phone: 228-688-4859 Fax: 228-688-5577 Email: doug.may at navy.mil |
Creation and Review Dates
DIF Creation Date:
2012-11-01
Last DIF Revision Date:
2013-03-18
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