User's Guide

 Product Description
 CLAVR-x User's Guide

File Specifications

File specification examples

 Product Description

Algorithm Theoretical Basis Documents

 Product Description
 Daytime Cloud Optical and Microphysical Properties (DCOMP)
 ABI Cloud Height Algorithm (ACHA)
 Cloud Mask


For general citations of the PATMOS-x/AVHRR product please use the following reference:

Heidinger, A. K., M. J Foster, A. Walther and X. Zhao, 2013: The Pathfinder Atmospheres Extended (PATMOS-x) AVHRR Climate Data Set. Bull. Amer. Meteor. Soc, doi:


Heidinger, A.K., Straka III, W.C., Molling, C.C., Sullivan, J.T. and Wu, X. 2010: Deriving an inter-sensor consistent calibration for the AVHRR solar reflectance data record. International Journal of Remote Sensing, 31, 6493-6517.

Molling, C.C., Heidinger, A.K., Straka III, W.C. and Wu, X. 2010: Calibrations for AVHRR channels 1 and 2: review and path toward consensus. International Journal of Remote Sensing., 31, 6519-6540.

Heidinger, A.K., Cao, C. and Sullivan, J.T. 2002: Using moderate resolution imaging spectrometer (MODIS) to calibrate advanced very high resolution radiometer reflectance channels. Journal of Geophysical Research 107, pp. 11.1-11.9.

Heidinger, A.K., Sullivan, J.T. and Rao, C.R.N. 2003: Calibration of visible and near-infrared channels of the NOAA-12 AVHRR using time series of observations over deserts. International Journal of Remote Sensing 24, Issue 18, pp. 3635-3649.


Walther, A., S. Miller, and A. K. Heidinger, 2013: The expected performance of cloud optical and microphysical properties derived from Suomi NPP VIIRS day/night band lunar reflectance, J. Geophys. Res. Atmos., 118(13), 230-240.

Walther, A. and A. K. Heidinger, 2012: Implementation of the Daytime Cloud Optical and Microphysical Properties algorithm (DCOMP) in PATMOS-x. Journal of Applied Meteorology and Climatology, 51, 7, pp.1371-1390.

Heidinger, A. K., A. T. Evan, M. J. Foster and A. Walther, 2012: A naive Bayesian cloud-detection scheme derived from CALIPSO and applied within PATMOS-x. Journal of Applied Meteorology and Climatology, 51(6), 1129-1144.

Heidinger, A. K., and Pavolonis, M. J.,2009: Gazing at Cirrus Clouds for 25 Years through a Split-Window. Part I: Methodology, Journal of Applied Meteorology and Climatology 28(6), 1100-1116.

Pavolonis, Michael J.; Heidinger, Andrew K. and Uttal, Taneil. 2005: Daytime global cloud typing from AVHRR and VIIRS: Algorithm description, validation, and comparisons. Journal of Applied Meteorology, Volume 44, Issue 6, 2005, pp.804-826.

Pavolonis, Michael J. and Heidinger, Andrew K.. 2004: Daytime cloud overlap detection from AVHRR and VIIRS. Journal of Applied Meteorology, Volume 43, Issue 5, 2004, pp.762-778.