LTER Related information available from NASA:

Most LTER sites are part of NASA's Global Land Cover Test Sites within the NASA Pathfinder program. A site description and map showing location and a Landsat-TM WRS map for these sites can be found at " http://glcts.maxey.dri.edu/glcts/sites/na/index.html ".
You can link to the NASA-EOS "V0" Information Management System (IMS) or to the NASA Distributed Active Archive Centers (DAAC's) themselves.
The Oak Ridge DAAC for Biogeochemical Dynamics can be reached at "http://www-eosdis.ornl.gov/". It is the NASA archive for ground verification data including the FIFE study data archive (Konza Prairie LTER)