Table 1 Instrument Characteristics of HIRS and IASI onMetOp Satellite
  HIRS IASI
Spectral Coverage 19 IR channels (670cm-1 ~ 2663cm-1) 8461 channels (546 cm-1 ~ 2760cm-1)
Instantaneous Field of view 0.70, 10km at nadir 0.80, 12km at nadir
Scan rate 6.4 seconds 8 seconds
Cross-track scan coverage ±49.50, 56 footprints per scan-line Spectral Calibration: Atmospheric spectral feature Radiometric Cal: Space-view, blackbody

Table 2 Empirical values of non-linearity coefficient, pre-launch measured values of non-linearity coefficient, and the channel dynamical ranges of the HIRS long-wave CO2 channels and window channel for the MetOp orbit (06:41 November 23, 2009)
CH Blackbody Bias (K) SRF shift (cm-1) Optimal Non-lin. Term Value (E-8)
4 0.142 -0.13 7.396
5 0.142 0.09 5.884
6 0.142 N/A 4.581
7 0.142 -0.15 4.913
8 0.142 N/A 6.767
Topic revision: r10 - 02 Dec 2011, ChrisChen - This page was cached on 04 Apr 2020 - 02:12.

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