Radiances and Cloud Analyses


GOES Dwell Soundings

A Prototype Product Set

A central issue for Mission to Planet Earth is the treatment in Global Climate Models (GCM) of the relationships among cloudiness, radiation, and water vapor. However, coordinated data sets which effectively constrain the choices open to GCM modelers in all three areas of uncertainty have been largely lacking. In principle radiance measurements from satellites provide, on the space and time scales that are relevant to a GCM, simultaneous information regarding water vapor, cloudiness, and their effects on the outgoing radiation at the top of the atmosphere. Such data products should also provide context dependent measures of uncertainty for all the major variables.

We offer a prototype sample of products covering a period of seven days in May 1988, in a combination of HTML and HDF-EOS formats, based upon the archive of data from the Visible/Infrared Spin Scan Radiometer (VISSR) Atmospheric Sounder (VAS) aboard the U.S. Geostationary Operational Environmental Satellites (GOES). These include observed radiances from all the VAS channels that were reported, the estimated radiances that a satellite would have seen under clear sky conditions, and an analysis of cloud top pressure and effective cloud fraction for high, middle, and low clouds. They cover the continental United States and adjacent ocean on a spatial resolution of one degree of latitude and longitude, approximately every 90 minutes. They are offered to the scientific community for evaluation. Submitted user comments will be incorporated into the science evaluation page below.


Our Products
and their Uses
View or Download Data
to your System
User Guide View User Guide
Science Objectives View GIF Images
Glossary of Terms Select Granules to Download
Product Description FORTRAN Radiation Code
Science Themes Project Components
Observed Radiances Product Set
Cloud Mask Product Description
Clear Sky Radiances Metadata Directory
Cloud Analysis Collection Metadata
Atmospheric Profiles Granule Directory
Cloud Forcing Granule Description for sample granule
Cloud Top Pressures and Cloud Fraction Browse GIF Images for sample granule
Dense Cirrus Inventory of VAS Archive
Surface Energy Balance Calibration
  Quality Assurance Reports

Science Evaluations

Contributed Comments

The information in this document was prepared under NASA contract number NAS13-7192 and may be used without restriction.

Attribution should be to:
"Radiances and Cloud Analysis from GOES Dwell Soundings", F. P. Bretherton and D. P. Wylie, Space Science and Engineering Center, University of Wisconsin - Madison, May 1998

Space Science and Engineering Center
Last modified August 2, 1998
Comments to gvp@ssec.wisc.edu