AVHRR Polar Pathfinder Twice-Daily 5 km EASE-Grid Composites

Data Contributors

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

Parameters

ALBEDO
BRIGHTNESS TEMPERATURE
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 Advanced Very High Resolution Radiometer (AVHRR) Polar Pathfinder Twice-Daily 5 km EASE-Grid Composites are a collection of products for both poles, consisting of twice-daily calibrated and gridded satellite channel data and derived parameters. Data include five 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, and Universal Coordinated Time (UTC) of acquisition. AVHRR Polar Pathfinder data extend pole ward from 48.4 degrees north and 53.2 degrees south latitudes, from 24 July 1981 through 30 June 2005. Data are in 1-byte and 2-byte integer grid format and are available by FTP.

Note: Due to a problem with the NOAA-16 scan motor, all the channel data is shifted sporadically between 2001 and 2005, causing the channels to contain data from another channel; thus, the derived parameters also contain errors during this time-period. See Table 12 in the Error sources section of the guide document for specific dates.

Data Citation

The following example shows how to cite the use of this data set in a publication. List the principal investigators, year of data set release, data set title and version number, dates of the data you used (for example, March to June 2004), publisher: NSIDC, and digital media.

Fowler, Chuck, James Maslanik, Terry Haran, Ted Scambos, Jeffrey Key, and William Emery. 2000, updated 2007. AVHRR Polar Pathfinder Twice-daily 5 km EASE-Grid Composites V003, [list dates of data used]. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media.