Source: USGS Landsat Program
TerraLook software Version 2.0 beta has been released, complete with a new user interface and improved usability. This simple and intuitive open-source software supports a variety of image processing and GIS capabilities, and works particularly well with the TerraLook images available from USGS EROS. The software can be downloaded from the Terralook website: http://terralook.cr.usgs.gov/

Above the Earth, Below the Surface: Landsat’s Role in Monitoring Water Quality
Safeguarding freshwater resources is crucial, and while scientists use a variety of ground-based techniques to gauge water quality, the Landsat program has provided water quality data from orbit for decades.