The Satellite Atmospheric Sounder IKFS-2: 2. Validation of the Temperature Sounding of the Atmosphere
- Authors: Polyakov A.V.1, Timofeyev Y.M.1, Uspensky A.B.2, Kukharsky A.V.2
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Affiliations:
- St. Petersburg State University
- Planeta State Research Center
- Issue: Vol 54, No 9 (2018)
- Pages: 1391-1398
- Section: Spacecraft, Space Systems, and Programs for Exploration of the Earth from Space
- URL: https://journals.rcsi.science/0001-4338/article/view/148671
- DOI: https://doi.org/10.1134/S0001433818090293
- ID: 148671
Cite item
Abstract
The validation of measurements of vertical temperature profiles by the IKFS-2 instrument (the Meteor-M no. 2 satellite) in cloudless conditions was based on the comparison with radiosonde measurements and data from NCEP GFS analysis. Vertical resolution matching is shown to decrease the root-mean-square (RMS) difference between the results provided by the two measurement methods by 0.2–1 K depending on the altitude in the atmosphere. When the vertical resolution is matched the absolute values of the mean differences between the satellite and the radiosonde measurements do not exceed 1 K and the mean square differences vary from 1.2 to 1.8 K, except for the surface layer, where they reach 2 K and 4 K, respectively. The RMS differences between the satellite temperature measurements and NCEP GFS data show worse agreement over the ground (up to 2 K against 1.2–1.5 K for sounders). In the 300–600 hPa pressure interval, the RMS difference between satellite and NCEP GFS data is less than 1 K over water surface but increases to 1.5–2 K over land. In the cloudless cases, the accuracy of sounding over water surface by IKFS-2 (when compared with the analysis results) approaches the accuracy displayed by IASI, which is functionally similar to IKFS-2.
About the authors
A. V. Polyakov
St. Petersburg State University
Author for correspondence.
Email: a.v.polyakov@spbu.ru
Russian Federation, St. Petersburg
Yu. M. Timofeyev
St. Petersburg State University
Email: a.v.polyakov@spbu.ru
Russian Federation, St. Petersburg
A. B. Uspensky
Planeta State Research Center
Email: a.v.polyakov@spbu.ru
Russian Federation, Moscow
A. V. Kukharsky
Planeta State Research Center
Email: a.v.polyakov@spbu.ru
Russian Federation, Moscow