FAN Xuewei, Branch of North China Sea, S.A.O.

Abstract

With the PHI spectral data obtained in the North Sea of China in 2001, the methods of radiometric calibration and the retrieval between the DN value of the spectral picture and the reflectance are discussed. Combining the spectral data measured synchronously on the ground, the reflectance is calculated by the method of linear regression and therefore the spectral curves of the background sea water and various kinds of redtide water are acquired. In this paper, the spectral feature and spectral difference of different objects are also analyzed, which may provide references to identify the different redtide biological species.

Keywords: Radiometric calibration, Reflectance retrieval, Spectral curve