Tropospheric Emission Spectrometer orTES was a satellite instrument designed to measure the state of the earth'stroposphere.[1]
TES was a high-resolutioninfraredFourier Transform spectrometer and provided key data for studying tropospheric chemistry, troposphere-biosphere interaction, and troposphere-stratosphere exchanges. It was built forNASA by theJet Propulsion Laboratory,California Institute of Technology inPasadena, California. It was successfully launched intopolar orbit by aDelta II 7920-10L rocket aboard NASA's thirdEarth Observing Systems spacecraft (EOS-Aura) at 10:02 UTC on July 15, 2004.[1] Originally planned as a 5-year mission, it was decommissioned after almost 14 years on January 31, 2018.[2]