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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 4, issue 6
Atmos. Meas. Tech., 4, 1177–1189, 2011
https://doi.org/10.5194/amt-4-1177-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Meas. Tech., 4, 1177–1189, 2011
https://doi.org/10.5194/amt-4-1177-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 23 Jun 2011

Research article | 23 Jun 2011

Matching radiative transfer models and radiosonde data from the EPS/Metop Sodankylä campaign to IASI measurements

X. Calbet1, R. Kivi2, S. Tjemkes1, F. Montagner1, and R. Stuhlmann1 X. Calbet et al.
  • 1EUMETSAT, Eumetsat-Allee 1, 64295 Darmstadt, Germany
  • 2Finnish Meteorological Institute, Arctic Research Centre, Tähteläntie 62, 99600 Sodankylä, Finland

Abstract. Radiances observed from IASI are compared to calculated ones. Calculated radiances are obtained using several radiative transfer models (OSS, LBLRTM v11.3 and v11.6) on best estimates of the atmospheric state vectors. The atmospheric state vectors are derived from cryogenic frost point hygrometer and humidity dry bias corrected RS92 measurements flown on sondes launched 1 h and 5 min before IASI overpass time. The temperature and humidity best estimate profiles are obtained by interpolating or extrapolating these measurements to IASI overpass time. The IASI observed and calculated radiances match to within one sigma IASI instrument noise in the spectral region where water vapour is a strong absorber (wavenumber, ν, in the range of 1500 ≤ ν ≤ 1570 and 1615 ≤ ν ≤ 1800 cm−1).

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