AVHRR Polar Pathfinder Twice-Daily 25 km EASE-Grid Composites

Data Contributors

FOWLER, CHUCK
MASLANIK, JIM
HARAN, TERRY
SCAMBOS, TED
KEY, JEFFREY
EMERY, WILLIAM

Parameters

ALBEDO
CLOUD AMOUNT/FREQUENCY
INFRARED RADIANCE
LAND SURFACE TEMPERATURE
SKIN TEMPERATURE
THERMAL INFRARED
THERMAL PROPERTIES
VIEWING GEOMETRY
VISIBLE RADIANCE

Instruments

AVHRR : ADVANCED VERY HIGH RESOLUTION RADIOMETER
RADIOMETERS

The AVHRR Polar Pathfinder Twice-Daily 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, average albedo and temperature, valid fraction file, solar zenith angle, satellite elevation angle, sun-satellite relative azimuth angle, surface type mask, cloud mask, cloud fraction files, and Universal Coordinated Time (UTC) of acquisition. The 25-km data are derived from the AVHRR Polar Pathfinder Twice-Daily 5 km EASE-Grid Composites, and extend poleward from 48.4 degrees north and 53.2 degrees south latitudes, spanning July 1981 through December 2000. Data are in 1-byte and 2-byte integer grid format and are available on 8 mm tape or by ftp.

Data Citation

Fowler, C., J. Maslanik, T. Haran, T. Scambos, J. Key, and W. Emery. 2002. AVHRR Polar Pathfinder twice-daily 25 km EASE-Grid composites. Boulder, CO: National Snow and Ice Data Center. Digital media.