Forward model and Jacobians for Tropospheric Emission Spectrometer retrievals
- 24 April 2006
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Geoscience and Remote Sensing
- Vol. 44 (5), 1308-1323
- https://doi.org/10.1109/tgrs.2005.860986
Abstract
The Tropospheric Emission Spectrometer (TES) is a high-resolution spaceborne sensor that is capable of observing tropospheric species. In order to exploit fully TES's potential for tropospheric constituent retrievals, an accurate and fast operational forward model was developed for TES. The forward model is an important component of the TES retrieval model, the Earth Limb and Nadir Operational Retrieval (ELANOR), as it governs the accuracy and speed of the calculations for the retrievals. In order to achieve the necessary accuracy and computational efficiency, TES adopted the strategy of utilizing precalculated absorption coefficients generated by the line-by-line calculations provided by line-by-line radiation transfer modeling. The decision to perform the radiative transfer with the highest monochromatic accuracy attainable, rather than with an accelerated scheme that has the potential to add algorithmic forward model error, has proven to be very successful for TES retrievals. A detailed description of the TES forward model and Jacobians is described. A preliminary TES observation is provided as an example to demonstrate that the TES forward model calculations represent TES observations. Also presented is a validation example, which is part of the extensive forward model validation effort.Keywords
This publication has 51 references indexed in Scilit:
- Methane line parameters in HITRANJournal of Quantitative Spectroscopy and Radiative Transfer, 2003
- Spectroscopic improvements providing evidence of formic acid in AERI-LBLRTM validation spectraJournal of Quantitative Spectroscopy and Radiative Transfer, 2003
- Spectroscopic database for ozone in the fundamental spectral regionsJournal of Geophysical Research: Solid Earth, 2002
- Retrieval of tropospheric ozone from simulations of limb spectral radiances as observed from spaceJournal of Geophysical Research: Solid Earth, 2002
- Infrared absorption cross-sections and integrated absorption intensities of HFC-134 and HFC-143a vapourJournal of Quantitative Spectroscopy and Radiative Transfer, 1998
- The Atmospheric Trace Molecule Spectroscopy (ATMOS) Experiment: Deployment on the ATLAS space shuttle missionsGeophysical Research Letters, 1996
- Retrieval of tropospheric ozone from simulations of nadir spectral radiances as observed from spaceJournal of Geophysical Research, 1995
- Measurement of the absorption cross-sections of CFC-11 at conditions representing various model atmospheresJournal of Quantitative Spectroscopy and Radiative Transfer, 1994
- High‐resolution absorption cross sections of chlorine nitrate in the ν2 band region around 1292 cm−1 at stratospheric temperaturesJournal of Geophysical Research: Solid Earth, 1994
- Temperature dependence of the infrared absorption cross sections of carbon tetrachlorideGeophysical Research Letters, 1992