AVHRR Polar Pathfinder Twice-Daily 1.25 km EASE-Grid Composites, Version 1
Data set id:
NSIDC-0065
This data set has been retired.

Overview

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).
Parameter(s):
ALBEDOBRIGHTNESS TEMPERATURECLOUD PROPERTIESINFRARED RADIANCELAND SURFACE TEMPERATURESKIN TEMPERATURESURFACE THERMAL PROPERTIESTHERMAL INFRAREDVIEWING GEOMETRYVISIBLE RADIANCE
Platform(s):
NOAA-11, NOAA-12, NOAA-14, NOAA-9
Sensor(s):
AVHRR
Data Format(s):
ASCII
Temporal Coverage:
1 April 1992 to 31 December 1998
Temporal Resolution:
  • 12 hour
Spatial Resolution:
  • Not Specified
Spatial Coverage:
N:
90
S:
48
E:
180
W:
-180
N:
-54
S:
-90
E:
180
W:
-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

Data Access & Tools

This data set has been retired. Please contact user services if you have questions.