AVHRR18_G-NAVO-L2P-v1.0_1

PODAAC-GH18G-2PN02

Version 1
  • 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.

Data Identification Fields:

Toggle Data Identification Fields
    Data Dates
    Creation
    Last Revision
    Processing Level

    2P

    Quality
    Collection Progress

    Not Provided

Related URLs
    Science Keywords
    • Earth Science
    • Oceans
    • Ocean Temperature
    • Sea Surface Temperature
    • Bulk Sea Surface Temperature

Acquisition Information Fields:

Toggle Acquisition Information Fields
Platforms
  • SPACECRAFT
    NOAA-18
    Instruments
    • AVHRR-3

Temporal Information Fields:

Toggle Temporal Information Fields

Spatial Information Fields:

Toggle Spatial Information Fields
    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL CARTESIAN CARTESIAN
Location Keywords
    • GEOGRAPHIC REGION
    • GLOBAL

Data Centers

Toggle Data Centers
  • Naval Oceanographic Office
    PROCESSOR

    This data center does not have any addresses listed.

    This data center does not have any contact mechanisms listed.

  • PO.DAAC
    ARCHIVER

    This data center does not have any addresses listed.

    This data center does not have any contact mechanisms listed.

  • Naval Oceanographic Office (NAVOCEANO)
    ARCHIVER

    This data center does not have any addresses listed.

Data Contacts

Toggle Data Contacts
  • Doug
    Data Center Contact
    Doug May

    Naval Oceanographic Office (NAVOCEANO)

    This contact does not have any addresses listed.

    This contact does not have any contact mechanisms listed.

Collection Citations Fields:

Toggle Collection Citations Fields