On Friday, December 18, 2009, the transmitter on Landsat 5 experienced technical difficulties. There has been no Landsat 5 data acquired since that time. The U.S. Geological Survey Flight Operations team has extensive experience with this transmitter and is currently addressing the situation. Any news or updates will be posted on the USGS Landsat website.
STELLA: A DIY Handheld Scientific Instrument
If you are looking for a do-it-yourself (DIY) handheld spectrometer, you need to meet STELLA. STELLA (Science and Technology Education for Land/Life Assessment) is a portable scientific instrument developed by