ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2016, Vol. 13, No. 6, pp. 264-272

IRFS-2 onboard radiometric calibration errors evaluation by comparison with SEVIRI/Meteosat-10 data

А.А. Kozlov 1 , D.A. Kozlov 2 , F.S. Zavelevich 2 , Yu.V. Kiseleva 1 , I.A. Kozlov 2 , A.V. Kuharsky 1 , А.N. Rublev 1 , A.B. Uspensky 1 , I.S. Cherkashin 2 
1 State Research Center «Planeta», Moscow, Russia
2 SSC Keldysh Research Centre, Moscow, Russia
Accepted: 25.10.2016
DOI: 10.21046/2070-7401-2016-13-6-264-272
Among payload of Meteor-M No.2 satellite (launched July 8th, 2014) the hyperspectral infrared sounder IRFS-2 is considered to be one of the key instruments for operational meteorology and climatology. The hyperspectral infrared sounder IRFS-2 provides measurements of the IR spectra in the range 5–15 μm. This paper describes the algorithm of comparison between radiances observed from IRFS-2 with SEVIRI (Meteosat-10) data. SEVIRI can be used as a reference instrument because its radiometric calibration has proven to be stable and high-accuracy. According to the comparison results, an average IRFS-2 calibration error for channels 7.3, 8.7, 9.7, 10.8, and 12.0 μm does not exceed 0.1–0.2 K. In the mean for channel 13.4 μm the brightness temperature measured by SEVIRI is less on 1K then effective temperature calculated from IASI data because of the shift in own calibration of SEVIRI. Similar findings were reported in the survey of WMO’s Global Space-based Inter-Calibration System (GSICS) where the comparison of radiances measured by SEVIRI and IASI (Metop-A, -B) was performed.
Keywords: infrared sounder, radiometric calibration, brightness temperatures, IRFS-2, SEVIRI, operational meteorology, climatology, GSICS
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