Remote sensing of volcanic plumes Related articles Direct solar FTIR measurements of CO2 and HCl in the plume of Popocatépetl Volcano, Mexico Combined direct-sun ultraviolet and infrared spectroscopies at Popocatépetl volcano (Mexico) Variability in the Gas Composition of the Popocatépetl Volcanic Plume Characterization of a UV camera system for SO2 measurements from Popocatépetl Volcano Continuous measurements of SiF4 and SO2 by thermal emission spectroscopy: Insight from a 6-month survey at the Popocatépetl volcano Volcanic SO2 and SiF4 visualization using 2-D thermal emission spectroscopy – Part 2: Wind propagation and emission rates Volcanic SO2 and SiF4 visualization using 2-D thermal emission spectroscopy – Part 1: Slant-columns and their ratios Gas composition of Popocatépetl Volcano between 2007 and 2008: FTIR spectroscopic measurements of an explosive event and during quiescent degassing SO2 emissions from Popocatépetl volcano: emission rates and plume imaging using optical remote sensing techniques passive DOAS installed on an ultra-light aircraft Airborne transect with passive DOAS around the Popocatepetl volcano