Get Data

NSIDC does not archive these data.
Data Set ID:

AVHRR Polar Pathfinder (APP) and Extended AVHRR Polar Pathfinder (APP-x) Climate Data Records, Version 1

The AVHRR Polar Pathfinder (APP) and Extended AVHRR Polar Pathfinder (APP-x) Climate Data Records provide a comprehensive set of variables that can be used to study trends and interactions within the Arctic and Antarctic climate systems. APP is a fundamental Climate Data Record (CDR) that provides channel reflectances and brightness temperatures. APP-x is a thematic CDR that builds on APP to provide information about surface and cloud properties and radiative fluxes. Both data sets provide twice daily observations spanning the period 1982 to present, for both polar regions.

The APP and APP-x CDRs are described in detail in:

Key, Jeffrey, et al. 2016. The AVHRR Polar Pathfinder Climate Data Records. Remote Sens. 8(3):167. DOI:

  • Infrared Wavelengths > Brightness Temperature
  • Sea Ice > Reflectance
Spatial Coverage: Not specified
Spatial Resolution: Not Specified
Temporal Coverage:
  • 1 January 1982
Temporal Resolution: Not specified
Data Format(s):
  • NetCDF
Platform(s) Not specified
Sensor(s): Not specified
Version: V1
Data Contributor(s):
Please contact the data provider for the correct Data Citation for this data set.

Literature Citation

As a condition of using these data, we request that you acknowledge the author(s) of this data set by referencing the following peer-reviewed publication.

No technical references available for this data set.
No FAQs or How Tos available for this data set.

Access complete Knowledge Base

Questions? Please contact:
NSIDC User Services
Phone: 1 303 492-6199