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In-flight spectral calibration of the oxygen A-band channel of MERIS

2003; Taylor & Francis; Volume: 24; Issue: 5 Linguagem: Inglês

10.1080/0143116021000031809

1366-5901

P. Dubuisson, Régis Borde, David Dessailly, R. Santer,

Atmospheric Ozone and Climate

A method for the in-flight spectral calibration of the oxygen A-band channel of MERIS is presented. This calibration is based on measurements of the atmospheric transmission in the oxygen A-band, using the relation between oxygen transmission and surface pressure. The accuracy of the method has been estimated by using radiative transfer calculations for realistic atmospheric conditions, assuming spectral shifts on the MERIS response. When the calibration is applied over bright surfaces, the expected accuracy of the spectral shift determination is about - 0.01 nm.