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Advances in Meteorology
Volume 2014, Article ID 585296, 15 pages
http://dx.doi.org/10.1155/2014/585296
Research Article

High-Resolution, Near Real-Time Simulation of Microwave Radiance Using a Simple Land-Cover Based Emissivity Prior

1Faculty of Environmental Sciences and Biochemistry, UCLM, 45071 Toledo, Spain
2National Observatory of Athens, IERSD, 15236 Athens, Greece
3Atmospheric Physics Group, Environment Institute, ULE, 24071 León, Spain
4Institute of Environmental Sciences (ICAM), 45071 Toledo, Spain
5Computing Systems Department, UCLM, 02071 Albacete, Spain

Received 16 December 2013; Revised 8 March 2014; Accepted 8 March 2014; Published 10 April 2014

Academic Editor: Luis Gimeno

Copyright © 2014 Dimitrios Katsanos et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Satellite simulators are used to calculate the brightness temperature that would be measured by a space borne sensor under a set of atmospheric conditions accounting for the radiometric characteristics of the sensor and the orbital parameters of the satellite. In this study, a simple approach is proposed for the parameterization of emissivity over land, a key parameter for the calculation of microwave . The rationale is to simulate a large ensemble of emissivity values for each frequency and surface characteristics and then relate the most likely observed value with soil characteristics. The derived emissivity values are used for the simulation of and simulated radiance is then compared with satellite observations. It is shown that this method improves the simulation of radiance and that it is suitable to provide a first guess of the emissivity value (a prior) that can then be refined using iterative procedures.