From the very beginning it was a looming ticking countdown clock to get the Thermal Infrared Sensor (TIRS) instrument ready for the Landsat Data Continuity Mission launch.

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