GF5B

LSE, Atmospheric transmittance, upward and downward atmospheric radiation for GF-5BThe Thermodynamic Initial Guess Retrieval (TIGR) data set, in its latest version, is a climatological library of 2311 representative atmospheric situations selected by statistical methods from 80,000 radiosonde reports (Chédin et al., 1985; Achard, 1991; Chevallier et al., 1998). Each situation is described, from the surface to the top of the atmosphere, by the values of the temperature, water vapour and ozone concentrations on a given pressure grid.Several datasets are associated with the above mentioned atmospheric profiles :The radiances (or equivalently the brightness temperatures) a satellite borne instrument (e.g. TOVS, ATOVS, AIRS, IASI, Modis, Seviri, IIR, etc..) would have observed under several conditions of observation (satellite zenith angle, surface characteristics, etc...).The transmittances and Jacobians (partial derivatives of the brightness temperature with respect to temperature, gas concentration for H2O, O3, CO2, N2O CO, CH4, etc., surface temperature and emissivity).