Henry Gordillo Millán¹, Efrain Solarte Rodríguez¹

¹Quantum Optics Group, Universidad del Valle AA 25360, Cali - Colombia

The theoretical calculation of the received energy values for a low atmosphere LIDAR system, using 532 nm Nd:YAG, 10ns pulses of 125mJ and a 0,254 m diameter telescope, was performed for air impurities laying about 1 km height. The simulations were made using available data from four DAGMA monitoring stations in Cali, Colombia. The data covered the months from April to November 2003, and contain humidity and polluting material densities (SO₂ and C-PM10) measurements. The extinction and backscattering effective sections for SO₂ and Carbon spheres has been calculated. For these calculations an homogenous distribution of the aerosols has been supposed, considering the SO₂ and the Carbon particles as the main polluting agents and like spheres with diameters corresponding to 0,48 and 6,1 microns respectively.