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TES Data Sets

 Image represents the TES project.

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.

Note: Due to instrument life-time concerns, the acquisition of TES limb data was suspended during nominal Global Survey operations following April 10, 2005 (Runs greater than 2861).
From June 6 to July 29,2008, TES Global Survey observations are eliminated below -60 degrees latitude, corresponding to Run 7370 to 8149.
Beginning July 30, 2008, TES Global Survey observations are restricted to between +70 to -50 degrees latitude, corresponding to Run 8187 and greater.
Ozone profiles with surface pressure larger than 1030 hPa should not be used in the current v004 TES data set. This condition of surface pressure occurs in approximately 1.5% of target scenes processed thus far. These target scenes may be identified in the TES O3 HDF product files through the data field Pressure; those target scenes indicating a non-fill Pressure of greater than 1030 hPa should be ignored. The targets with this error can also be identified by the presence of negative AveragingKernelDiagonal values (< -0.01). An update to the v004 software will fix the problem with these targets, and all targets will be reprocessed before v004 processing is completed. (see Ozone profiles reprocessing)

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Available Data Products
Product Description
Level 3 Daily Products Retrieved species (CH4, CO, H2O, HDO, HNO3, O3) volume mixing ratio or temperature data from a Level 2 Global Survey run interpolated onto a uniform global latitude/longitude grid at selected pressure levels.
Each Level 3 file has an associated browse product file which contains Level 2 and Level 3 images.
Level 3 Monthly Products Retrieved species (CH4, CO, H2O, HDO, HNO3, O3) volume mixing ratio or temperature data for Global Surveys initiated within a month interpolated onto a uniform global latitude/longitude grid at selected pressure levels.
Each Level 3 file has an associated browse product file which contains Level 2 and Level 3 images.
Level 2 Global Survey Standard Products Retrieved species (CH4, CO, H2O, HDO, HNO3, O3) volume mixing ratio or temperature profiles at the observation targets and the estimated errors for a global survey of up to 16 orbits.
Level 2 Special Observation Products Retrieved species (CH4, CO, H2O, HDO, HNO3, O3) volume mixing ratio or temperature profiles and the estimated errors for research observations.
Level 1B Standard Products Radiometric calibrated spectral radiances and their corresponding noise equivalent spectral radiances (NESR) for a single TES orbit.
Level 1B Special Observation Products Radiometric calibrated spectral radiances and their corresponding noise equivalent spectral radiances (NESR) for research observations.

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