Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

Processing, archiving and distributing Earth science data
at the NASA Langley Research Center

Replacement of SSE with NASA's POWER Project GIS-enabled Web Data Portal

Replacement of SSE with NASA's POWER Project GIS-enabled Web Data Portal

Friday, March 16, 2018

Replacement of SSE (Release 6) with NASA's Prediction of Worldwide Energy Resource (POWER) Project GIS-enabled Web Data Portal:


Update 4/30: Proposed release date changed from May 1st to June 13th.

The SSE (Release 6) has been nearly unchanged since its release in April 2008.  We wish to thank you for using these data and we hope that they have been useful for you in your various applications.  You may have noticed new banners on the web site announcing a transition to a new revised web site.  As a registered user of SSE, we would like to more fully explain our current process.  During the last three years we have been developing a fully revised and updated GIS-enabled set of web applications aimed at providing access to updated data sets with far more options to obtain them.  This effort has been developed under the Prediction Of Worldwide Energy Resource (POWER) Project funded largely by NASA Earth Applied Sciences program.


The new POWER web portal facilitates access to NASA's satellite and modeling analysis for Renewable Energy, Sustainable Buildings and Agroclimatology applications.  A new POWER dataset on a ½ x ½ degree global grid with enhanced GIS capabilities will replace the current SSE web applications (including the GIS applications) around June 13, 2018.  Access will be available through a GIS-enabled Data Access Viewer, ArcGIS Image Services and an API service that provides data in a number of formats.  The URL for SSE data portal will continue to be   If you are interested in testing the new capabilities in their BETA mode, prior to the release, please visit


This beta version of the POWER data portal provides access to surface meteorological parameters that are completely updated and replaced based upon data from NASA's MERRA-2 (Modern Era Reanalysis-assimilation for Research and Applications) atmospheric reanalysis.  The original solar data products have been remapped to a ½ x ½ degree global grid and migrated to POWER.  The time series and climatological values for most parameters have been lengthened and updated to within a week of real-time using NASA's CERES (Clouds and Earth's Radiant Energy System) FLASHFlux data set (  The methodology documentation includes updated definitions and parameter uncertainty information derived using surface measurements.  Data can still be output in ASCII tables, but in addition users can select a variety outputs including CSV,  JSON, ICASA, NetCDF, and geoTIFF.  Climatological averages are still available but notice that these are now computed from a more modern period and that daily, monthly and year-by-year values are now more easily obtained.  A new users guide and API documentation has been developed to ease the transition to the new web portal.


It is important to note that we are still in the process of transitioning the on-the-fly parameter capability to the new web site and so some of the parameters you may have accessed through the SSE data site  may be temporarily unavailable through the DAV, but may be supported under the API service.  Please feel free to contact us with any concerns, questions or other issues that you may have in regards to the new capabilities.  You may address questions ASDC user services at[submitted][subject_menu]=SSE or by sending an e-mail to


We appreciate your patience during this time of transition, but in the end we believe the capabilities will enable users like yourself to obtain updated datasets far more rapidly and conveniently than before.