München 2004 – wissenschaftliches Programm

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UP: Umweltphysik

UP 4: Satelliten und Anwendungen I

UP 4.4: Fachvortrag

Montag, 22. März 2004, 15:00–15:15, HS 225

Influence of cloud inhomogeneity on remote sensing — •Tobias Zinner — DLR Oberpfaffenhofen, Institut für Physik der Atmosphäre, 82234 Wessling, Germany

Current remote sensing techniques assume that (1) the signal is homogeneous over the field of view; and (2) adjacent pixels are independent, because net photon transport can be neglected. Both of these assumptions are not valid for real clouds. Biases are depending on the inhomogeneity of the clouds and the resolution of the instrument. Investigating these errors primarily comprises the need for a test bed. This has to contain realistic cloud fields, a representation of the atmosphere and a 3D radiative transfer model to simulate the radiation field. The generation of 3D cloud data sets requires in-depth investigations on combinations of measured data from several sensor types and on more general characteristics of clouds which are utilised to close the information gaps always remaining.