AVHRR Pathfinder Level 3 Monthly Nighttime SST Version 5

AVHRR Pathfinder Level 3 Monthly Nighttime SST Version 5
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DOI10.5067/PATHF-MON50
Short NameAVHRR_PATHFINDER_L3_SST_MONTHLY_NIGHTTIME_V5
DescriptionThe 4 km Advanced Very High Resolution Radiometer (AVHRR) Pathfinder Version 5 sea surface temperature (SST) dataset is a reanalysis of historical AVHRR data that have been improved using extensive calibration, validation and other information to yield a consistent research quality time series for global climate studies. This SST time series represents the longest continual global ocean physical measurement from space. Development of the Pathfinder dataset is sponsored by the NOAA National Oceanographic Data Center (NODC) in collaboration with the University of Miami Rosensteil School of Marine and Atmospheric Science (RSMAS) while distribution is a collaborative effort between the NASA Physical Oceanography Distributed Active Archive Center (PO.DAAC) and the NODC. From a historical perspective, the Pathfinder program was originally initiated in the 1990s as a joint NOAA/NASA research activity for reprocessing of satellite based data sets including SST. The AVHRR is a space-borne scanning sensor on the National Oceanic and Atmospheric Administration (NOAA) family of Polar Orbiting Environmental Satellites (POES) having an 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. For the Pathfinder SST algorithm only the 11 and 12 micron channels are used. 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. This particular dataset is produced from Global Area Coverage (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. The collection of NOAA satellite platforms used in the AVHRR Pathfinder SST time series includes NOAA-7, NOAA-9, NOAA-11, NOAA-14, NOAA-16, NOAA-17, and NOAA-18. These platforms contain "afternoon" orbits having a daytime ascending node of between 13:30 and 14:30 local time (at time of launch) with the exception of NOAA-17 that has a daytime descending node of approximately 10:00 local time. SST AVHRR Pathfinder includes separate daytime and nighttime daily, 5 day, 8 day, monthly and yearly datasets. This particular dataset represent nighttime monthly averaged observations.
Version5
Dataset TypeOPEN
MeasurementOceans > Ocean Temperature > Sea Surface Temperature
Processing Level3
CoverageRegion: Global
Northernmost Latitude: 90 degrees
Southernmost Latitude: -90 degrees
Westernmost Longitude: -180 degrees
Easternmost Longitude: 180 degrees
Time Span: 1985-Jan-04 to 2009-Dec-31
ResolutionSpatial Resolution: 0.044 degrees (Latitude) x 0.044 degrees (Longitude)
Temporal Resolution: 1 Month
ProjectionType: Gridded
Detail:
Ellipsoid: 7030/WGS 84 (6378137.00,6356752.31)
Latency hours
Platform/Sensor
NOAA-16
Platform
Name: National Oceanic & Atmospheric Administration-16 (NOAA-16)
Orbit Period: 102.1 minutes
Inclination Angle: 99 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
AVHRR-3
SENSOR
Name: Advanced Very High Resolution Radiometer-3 (AVHRR-3)
Swath Width: 2400 km
Description: The AVHRR is a radiation-detection imager that can be used for remotely determining cloud cover and the surface temperature. Note that the term surface can mean the surface of the Earth, the upper surfaces of clouds, or the surface of a body of water.

NOAA-17
Platform
Name: National Oceanic & Atmospheric Administration-17 (NOAA-17)
Orbit Period: 101.2 minutes
Inclination Angle: 98.7 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
AVHRR-3
SENSOR
Name: Advanced Very High Resolution Radiometer-3 (AVHRR-3)
Swath Width: 2400 km
Description: The AVHRR is a radiation-detection imager that can be used for remotely determining cloud cover and the surface temperature. Note that the term surface can mean the surface of the Earth, the upper surfaces of clouds, or the surface of a body of water.

NOAA-18
Platform
Name: National Oceanic & Atmospheric Administration-18 (NOAA-18)
Orbit Period: 102.12 minutes
Inclination Angle: 98.74 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
AVHRR-3
SENSOR
Name: Advanced Very High Resolution Radiometer-3 (AVHRR-3)
Swath Width: 2400 km
Description: The AVHRR is a radiation-detection imager that can be used for remotely determining cloud cover and the surface temperature. Note that the term surface can mean the surface of the Earth, the upper surfaces of clouds, or the surface of a body of water.

NOAA-11
Platform
Name: National Oceanic & Atmospheric Administration-11 (NOAA-11)
Orbit Period: 102 minutes
Inclination Angle: 99 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
AVHRR-2
SENSOR
Name: Advanced Very High Resolution Radiometer-2 (AVHRR-2)
Swath Width: 2400 km
Description: The AVHRR is a radiation-detection imager that can be used for remotely determining cloud cover and the surface temperature of water land and clouds.

NOAA-9
Platform
Name: National Oceanic & Atmospheric Administration-9 (NOAA-9)
Orbit Period: 102 minutes
Inclination Angle: 98 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
AVHRR-2
SENSOR
Name: Advanced Very High Resolution Radiometer-2 (AVHRR-2)
Swath Width: 2400 km
Description: The AVHRR is a radiation-detection imager that can be used for remotely determining cloud cover and the surface temperature of water land and clouds.

NOAA-14
Platform
Name: National Oceanic & Atmospheric Administration-14 (NOAA-14)
Orbit Period: 102 minutes
Inclination Angle: 99 degrees
Ascending Node: 1970-Jan-01 00:00:00
/
AVHRR-2
SENSOR
Name: Advanced Very High Resolution Radiometer-2 (AVHRR-2)
Swath Width: 2400 km
Description: The AVHRR is a radiation-detection imager that can be used for remotely determining cloud cover and the surface temperature of water land and clouds.

ProjectPathfinder Version 5.0 (AVHRR PATHFINDER)
Data ProviderCreator: NODC and Rosenstiel School of Marine and Atmospheric Science
Release Place: NOAA National Oceanographic Data Center, Silver Spring, MD 20910, USA
Release Date: 2003-Sep-04
Resource: http://www.nodc.noaa.gov/sog/pathfinder4km/userguide.html
Keyword(s)Pathfinder, sea surface temperature, polar, sun-synchronous, sst, surface temperature, AVHRR, AVHRR2, AVHRR3
Persistent IDPODAAC-PATHF-MON50
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
User's Guide
User's Guideftp://podaac-ftp.jpl.nasa.gov/allData/avhrr/L3/pathfinder_v5/L3/docs/avhrr_pathfinder_sst_v5.html
describes Pathfinder Version 5
User's Guidehttp://www.nodc.noaa.gov/sog/pathfinder4km/userguide.html
NOAA's Pathfinder Version 5 documentation
Known Issues
Pathfinder Current Status and Historyhttp://www.nodc.noaa.gov/SatelliteData/pathfinder4km/status.html
History of Reported Modifications and Processing History
Citation NODC and Rosenstiel School of Marine and Atmospheric Science. 2003. AVHRR Pathfinder Level 3 Monthly Nighttime SST Version 5. Ver. 5. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at http://dx.doi.org/10.5067/PATHF-MON50.

For more information see Data Citations and Acknowledgments.

Journal Reference ftp://podaac-ftp.jpl.nasa.gov/allData/avhrr/L3/pathfinder_v5/docs/avhrr_pathfinder_sst_v5.html. The following may be used in citing the pathfinder data sets for publication purposes: Kilpatrick, K.A., G.P. Podesta and R. Evans (2001), Overview of the NOAA/NASA Advanced Very High Resolution Radiometer Pathfinder algorithm for sea surface temperature and associated matchup database, J. Geophys. Res., 106, C5, 9179-9197.