Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

Processing, archiving and distributing Earth science data
at the NASA Langley Research Center

TES Data and Information

TES Logo

TES Data and Information

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.


TES Instrument Operational Status

The TES instrument metrology laser use was discontinued (due to laser failure) in July 2016.  The operational TES instrument data collection has been reconfigured to use the SimClk (on-board clock simulator) to continue acquisition of raw atmospheric species data.  The data is currently being processed through L1A and delivered to the DAAC.  Algorithm and engineering activities are on-going to update the L1B and Level 2 processing algorithms to accommodate this new data collection methodology.  The TES project team anticipates that processed L1B and L2 data will be available in September/October 2017.


The TES project is continuing with the Release 14 software reprocessing effort and is delivering L1B (version 006) and L2 (version 007) data products to the ASDC.

Products Data Products

Level 3 Products

Products Data Products

Level 2 Products

Products Data Products

Level 1B Products

Products Data Products

Joint Products

TES read software is product dependent. If read software is available, a "read software" tab will appear on the product landing page.