Exploring the Atmosphere by Remote Sensing Techniques Only satellite based remote sensing instruments generate the wealth of global data on the concentrations of atmospheric constituents that are necessary for long term monitoring of the atmosphere. This set of courses and lectures sponsored by ICTP in Trieste focuses on remote sensing for atmospheric applications and inverse methods to assess atmospheric components gases aerosols and clouds. It addresses primarily graduate students and young researchers in the atmospheric sciences but will be useful for all those wishing to study various techniques for exploring the atmosphere by remote sensing. Contributions span topics such as on IGOS (Integrated Global Observing Strategy) electromagnetic scattering by non spherical particles forward modelling requirements and the information content problem Earth radiation and aerosol monitoring by LIDAR