Source: USGS
A quote to note from John Schott on the importance of the Landsat archive:
“We’ve got this data of every field, of every country…. the archive is just going to continue to yield good information, good science, better management, reduced costs. It’s incredible.”

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