Comparison between CZCS data from 10 July 1979 and simultaneous in situ measurements for south-eastern Scottish waters

Abstract

Abstract This paper presents an analysis of coastal zone colour scanner (CZCS) data for a date for which simultaneous iin situ measurements exist. Using CZCS data of 10 July 1979 for the vicinity of Dundee, the inflight slope and intercept for all spectral bands were calculated. Comparison of these results with the pre-flight values show that the deviations of the inflight slopes from the pre-flight slopes for the visible bands are within 11 per cent, whereas the deviations in the intercepts are found to be rather larger. The contribution to the satellite-recorded radiance from the atmospheric interplay was removed using Sturm's atmospheric correction method which incorporates the iteration procedure described by Smith and Wilson. Many algorithms have been used for comparing the upwelling radiance with the in situ chlorophyll-like pigment concentrations. Although, some of the algorithms gave good correlation coefficients, the constants in the algorithms used turn out to be quite different from the values ...