Share Email Print
cover

Proceedings Paper

Estimation of uncertainties in the spectral response function of the water vapor channel of a meteorological imager
Author(s): Myoung-Hwan Ahn; Su Jeong Lee; Dohyeong Kim
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The five channel meteorological imager (MI) on-board the geostationary Communication, Ocean, and Meteorological Satellite (COMS) of Korea has been operationally used since April 2011. For a better utilization of the MI data, a rigorous characterization of the four infrared channel data has been conducted using the GSICS (Global Space-based Inter-Calibration System) approach with the IASI (Infrared Atmospheric Sounding Interferometer) on-board the European Metop satellite as the reference instrument. Although all four channels show the uncertainty characteristics that are in line with the results from both the ground tests and the in-orbit-test, there shows an unexpected systematic bias in the water vapor channel of MI, showing a cold bias at the warm target temperature and a warm bias with the cold target temperature. It has been shown that this kind of systematic bias could be introduced by the uncertainties in the spectral response function (SRF) of the specific channel which is similar to the heritage instruments on-board GOES series satellite. An extensive radiative transfer simulation using a radiative transfer model has confirmed that the SRF uncertainty could indeed introduce such a systematic bias. By using the collocated data set consisting of the MI data and the hyperspectral IASI data, the first order correction value for the SRF uncertainty is estimated to be about 2.79 cm-1 shift of the central position of the current SRF.

Paper Details

Date Published: 19 June 2015
PDF: 9 pages
Proc. SPIE 9535, Third International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2015), 95351V (19 June 2015); doi: 10.1117/12.2192518
Show Author Affiliations
Myoung-Hwan Ahn, Ewha Womans Univ. (Korea, Republic of)
Su Jeong Lee, Ewha Womans Univ. (Korea, Republic of)
Dohyeong Kim, Korea Meteorological Administration (Korea, Republic of)


Published in SPIE Proceedings Vol. 9535:
Third International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2015)
Diofantos G. Hadjimitsis; Kyriacos Themistocleous; Silas Michaelides; Giorgos Papadavid, Editor(s)

© SPIE. Terms of Use
Back to Top