Part of #On the Accuracy of Satellite-Derived Surface Radiation Budget (Introduction to an Auxiliary Software)# :
Publishing year : 2006
Conference : Geomatics conference
Number of pages : 14
Abstract: The derivation of energy components is one of the major mandates of remote sensing techniques with which the retrieval of many environmental parameters will be possible. The major energy component that strongly influences the energy balance is sun downward energy. Indirect derivations of the energy components through satellite imagery are common in the absence of direct measurements with reliable instruments. However, there are always some uncertainties involved with satellite data. This paper presents a explanation in the development of a tool for modeling downward radiation received at the surface. Also, a software named "Sun Energy" developed by these
Authors to help modify the satellite-derived spectral irradiances will be introduced. This software will be devoted to those researchers who are retrieving information from satellite images and are aOn the Accuracy of Satellite-Derived Surface Radiation Budget (Introduction to an Auxiliary Software)ious about the data decentness and integrity. This work focuses on the estimation of the spectral irradiance under all clear sky conditions, all kinds of atmospheric parameters and surface slopes and aspects. The model for satellite derivation of the data is based on the NREL's SPECTRAL2 (Myers et.al 2003) model for clear skies which takes no account of cloud attenuation of solar radiation. Development of the original model involves modification of the aerosol model and extended work on the Dedieu (1987) for developing a physically model to derive a downward solar irradiance at the surface of the earth and surface albedo from Meteosat7 satellite measurements in a wave length of 0.3 to 4 The model takes into account Rayleigh and Mie scattering, water vapor and Ozone absorption. We believe that this software will help those who retrieve sun downward energies from satellite images, especially those images with low spatial resolution. A thorough research needs to be done in the field with simultaneous in-situ measurements and satellite overpass, which is our future impetus.