Source: USGS
Evaluation of the Landsat 5 data following the recent spacecraft anomaly is complete. All data collected at the Landsat Ground Station in Sioux Falls, South Dakota from Saturday, August 15, 2009 through today (Monday, August 17, 2009) are currently available for order or immediate download (http://glovis.usgs.gov or http://earthexplorer.usgs.gov). Engineers deemed the data from Friday, August 14 as non-nominal due to cooler than normal temperatures associated with the primary focal plane of the instrument. Data from that day will remain unavailable for order or download. The Landsat Team continues to investigate the cause of the incident, but do not have anything definitive to report at this time.

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.