AVHRR Polar Pathfinder (APP), Version 1
Data set id:
NSIDC-0745
DOI: 10.7289/V5BC3WHM

Overview

This NOAA Climate Data Record (CDR) contains the AVHRR Polar Pathfinder (APP) product. APP is a fundamental CDR comprising calibrated and navigated AVHRR channel data (reflectances and brightness temperatures), viewing and illumination geometry (sensor scan angle, solar zenith angle, and sun-sensor relative azimuth angle), Universal Coordinated Time (UTC) of the data acquisition, and a surface type mask. The data are twice daily composites of up to 23 orbits on a 5 km Equal-Area Scalable Earth (EASE)-Grid twice daily over both poles, the Arctic and Antarctic, from 1982 to the present. The daily APP composites are centered on local solar times of 14:00 (high sun, but could be nighttime for some polar areas in winter) and 04:00 for the Arctic or 02:00 for the Antarctic. The APP covers the north polar region (Arctic) from 48.4 degrees northward, and the south polar region (Antarctic) from -53.2 degrees southward.
Parameter(s):
BRIGHTNESS TEMPERATUREREFLECTANCE
Platform(s):
Not Specified
Sensor(s):
Not Specified
Data Format(s):
NetCDF
Temporal Coverage:
1 January 1982 to present
Temporal Resolution:
  • 12 hour
Spatial Resolution:
  • 5 km
  • 5 km
Spatial Reference System(s):
NSIDC EASE-Grid North
EPSG:3408

NSIDC EASE-Grid South
EPSG:3409
Spatial Coverage:
N:
-53.2
S:
-90
E:
180
W:
-180
N:
90
S:
48.4
E:
180
W:
-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.
NSIDC does not archive or provide citation guidance for these data.