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Tropospheric Emission Spectrometer (TES)
TES  Instrument detail TES is a high-resolution infrared-imaging Fourier transform spectrometer with spectral coverage of 3.2 to 15.4 µm at a spectral resolution of 0.025 cm -1 , thus offering line-width-limited discrimination of essentially all radiative active molecular species in the Earth's lower atmosphere. TES has the capability to make both limb and nadir observations. In the limb mode, TES has a height resolution of 2.3 km, with coverage from 0 to 34 km. In the downlooking modes, TES has a spatial resolution of 0.53 x 5.3 km with a swath of 5.3 x 8.5 km. TES is a pointable instrument and can access any target within 45° of the local vertical, or produce regional transects up to 885-km length without any gaps in coverage. TES employs both the natural thermal emission of the surface and atmosphere and reflected sunlight, thereby providing day-night coverage anywhere on the globe. Observations from TES will further understanding of long-term variations in the quantity, distribution, and mixing of minor gases in the troposphere, including sources, sinks, troposphere-stratosphere exchange, and the resulting effects on climate and the biosphere. TES will provide global maps of tropospheric ozone and its photochemical precursors. These observations will serve as primary inputs to a database of the three-dimensional distribution (on global, regional, and local scales) of gases important to tropospheric chemistry, troposphere-biosphere interactions, and troposphere-stratosphere exchange. Other objectives include:
  • Simultaneous measurements of NOy, CO, O3, and H2O for use in the determination of the global distribution of OH, an oxidant of central importance in tropospheric chemistry;
  • measurements of SO2 and NOy as precursors to the strong acids H2, SO2 and HNO3, which are the main contributors to acid deposition;
  • measurements of gradients of many tropospheric species in order to understand troposphere-stratosphere exchange;
  • and determination of long-term trends in radiative active minor constituents in the lower atmosphere to investigate effects on global radiative balance and atmospheric dynamics.
For more Details, Images, or Data Products, visit the Aura science web site