NSIDC-0065_1

AVHRR Polar Pathfinder Twice-Daily 1.25 km EASE-Grid Composites, Version 1

Version 1 eng; usa
  • Abstract

    Please note that the machine on which these AVHRR data are processed has reached its life expectancy and will no longer be available as of 02 June 2008 until further notice.

    The AVHRR Polar Pathfinder Twice-Daily 1.25 km EASE-Grid Composites are a collection of products for both poles, consisting of twice-daily gridded and calibrated satellite channel data and derived parameters. Data include five Advanced Very High Resolution Radiometer (AVHRR) channels, clear sky surface broadband albedo and skin temperature, solar zenith angle, satellite elevation angle, sun-satellite relative azimuth angle, surface type mask, cloud mask, orbit mask, time of acquisition, and ice motion vectors. Data are composited onto two grids per day based on common local solar times and scan angle. Reduced-resolution data (25 km) derived from the 1.25 km data are available to assist users in selecting these data. AVHRR local area coverage (LAC) and High Resolution Picture Transmission (HRPT) level 1b data are used to generate the Polar Pathfinder products at grid spacings of 1.25 km. AVHRR Polar Pathfinder data extend poleward from 48.4 degrees north and 53.2 degrees south latitudes, from August 1993 through December 1998 for the Northern Hemisphere, and from April 1992 through January 1996 for the Southern Hemisphere. Data are in 1-byte and 2-byte integer grid format. Ice motion vectors are in ASCII text format. Data are available on 8-mm tape or by ftp. Distribution formats available: North: 104 MB (2-byte), 52 MB (1-byte), 8 MB (ice motion) South: 82 MB (2-byte), 41 MB (1-byte), 6.3 MB (ice motion).
  • Purpose
    Scientific Research

Data Identification Fields:

Toggle Data Identification Fields
    Processing Level

    Level 3

    Quality
    Collection Progress

    Planned

Related URLs
    Science Keywords
    • EARTH SCIENCE
    • Atmosphere
    • Atmospheric Radiation
    • Albedo
    • EARTH SCIENCE
    • Cryosphere
    • Snow/Ice
    • Albedo
    • EARTH SCIENCE
    • Terrestrial Hydrosphere
    • Snow/Ice
    • Albedo
    • EARTH SCIENCE
    • Land Surface
    • Surface Radiative Properties
    • Albedo
    • EARTH SCIENCE
    • Spectral/Engineering
    • Infrared Wavelengths
    • Brightness Temperature
    • EARTH SCIENCE
    • Atmosphere
    • Clouds
    • Cloud Amount/Frequency
    • EARTH SCIENCE
    • Spectral/Engineering
    • Infrared Wavelengths
    • Infrared Radiance
    • EARTH SCIENCE
    • Land Surface
    • Land Temperature
    • Land Surface Temperature
    • EARTH SCIENCE
    • Land Surface
    • Land Temperature
    • Skin Temperature
    • EARTH SCIENCE
    • Spectral/Engineering
    • Infrared Wavelengths
    • Thermal Infrared
    • EARTH SCIENCE
    • Land Surface
    • Surface Radiative Properties
    • Thermal Properties
    • EARTH SCIENCE
    • Spectral/Engineering
    • Platform Characteristics
    • Viewing Geometry
    • EARTH SCIENCE
    • Spectral/Engineering
    • Visible Wavelengths
    • Visible Radiance

Acquisition Information Fields:

Toggle Acquisition Information Fields
Platforms
  • Satellite
    NOAA-11
    Instruments
    • AVHRR
  • Satellite
    NOAA-12
    Instruments
    • AVHRR
  • Satellite
    NOAA-14
    Instruments
    • AVHRR
  • Satellite
    NOAA-9
    Instruments
    • AVHRR

Temporal Information Fields:

Toggle Temporal Information Fields

Spatial Information Fields:

Toggle Spatial Information Fields
    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL CARTESIAN GEODETIC
Location Keywords
    • Continent
    • Antarctica
    • Geographic Region
    • Arctic
    • Geographic Region
    • Polar

Data Centers

Toggle Data Centers
  • National Snow and Ice Data Center
    ARCHIVER

    National Snow and Ice Data Center
    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
  • National Snow and Ice Data Center
    DISTRIBUTOR

    National Snow and Ice Data Center
    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email

Data Contacts

Toggle Data Contacts
  • Jeffrey
    Technical Contact
    Jeffrey Key

    Space Science and Engineering Center
    University of Wisconsin at Madison
    1225 W. Dayton St.
    Madison, WI 53706

    This contact does not have any contact mechanisms listed.

  • Jim
    Technical Contact
    Jim Maslanik

    This contact does not have any addresses listed.

    This contact does not have any contact mechanisms listed.

  • Ted
    Technical Contact
    Ted Scambos

    National Snow and Ice Data Center
    CIRES, 449 UCB
    Boulder, CO 80309-0449

  • William
    Technical Contact
    William Emery

    Colorado Center for Astrodynamics Research
    University of Colorado
    Boulder, CO 80309-0431

    This contact does not have any contact mechanisms listed.

  • Chuck
    Technical Contact
    Chuck Fowler

    Colorado Center for Astrodynamics Research
    University of Colorado
    Boulder, CO 80309-0431

    This contact does not have any contact mechanisms listed.

  • W.
    Technical Contact
    W. Scambos

    This contact does not have any addresses listed.

    This contact does not have any contact mechanisms listed.

  • National Snow and Ice Data Center
    User Services
    National Snow and Ice Data Center

    Boulder, Colorado

    This contact does not have any contact mechanisms listed.

  • NSIDC
    Data Center Contact
    NSIDC Services

    National Snow and Ice Data Center

    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
  • Terry
    Data Center Contact
    Terry Haran

    National Snow and Ice Data Center

    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    This contact does not have any contact mechanisms listed.

  • NSIDC
    Data Center Contact
    NSIDC Services

    National Snow and Ice Data Center

    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    • 1 303 492 6199
    • 1 303 492 2468
    • Email
  • Terry
    Data Center Contact
    Terry Haran

    National Snow and Ice Data Center

    CIRES, 449 UCB
    University of Colorado
    Boulder, CO 80309-0449

    This contact does not have any contact mechanisms listed.

Collection Citations Fields:

Toggle Collection Citations Fields
    Collection Citations
    • AVHRR Polar Pathfinder Twice-Daily 1.25 km EASE-Grid Composites, Version 1
      1

      Published by: National Snow and Ice Data Center