The Tropospheric Emission Spectrometer (TES) launched into sun-synchronous orbit aboard Aura, the third of NASA's Earth Observing System (EOS) spacecraft, on July 15, 2004. The primary objective of TES is to make global, three-dimensional measurements of ozone and other chemical species involved in its formation and destruction.
TES is a high-resolution imaging infrared Fourier-transform spectrometer that operates in both nadir and limb-sounding modes. TES global survey standard products include profile measurements of ozone, water vapor, carbon monoxide, methane, nitrogen dioxide, and nitric acid for 16 orbits every other day. TES Special Observations are research measurements of targeted locations or regional transects which are used to observe specific phenomena or to support local or aircraft validation campaigns.
The TES Level 1B products are written in NCSA's HDF5 format. The Level 2 and Level 3 data products are written in HDF-EOS5 (based on HDF5) format. The TES Lite products, under Level 2, are intended to simplify TES data usage including data /model and data/data comparisons. This product can be used for science analysis as each data product is fully characterized.
The TES instrument metrology laser end of life testing that resumed on January 11, 2017 provided a gradual increase in the laser diode current. This increase has resulted in the restoration of the primary metrology laser. The TES instrument was transitioned back to laser metrology mode on January 24 and laser A is again producing science interferograms. The operational TES instrument data collection has been reconfigured to use the metrology laser and SimClk (on-board clock simulator) to continue acquisition of raw atmospheric species data. The metrology data collected data is being processed through the entire ground data system and is being routinely delivered to the DAAC as part of the Release 14 software reprocessing effort. The TES project team is continuing the SimClk software adaptation and anticipates that processed L1B and L2 data will be available in 2017.