Landsat data is an impartial tool to allocate precious water resources thumbnail: http://svs.gsfc.nasa.gov/vis/a010000/a010400/a010484/Landsat_Evapotranspiration_Final-ipod_gal.png

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