Abstract: A method for remotely screening a selected area of the atmosphere for the presence of emissions into the atmosphere comprises moving a mobile platform, such as an aircraft, which carries an atmospheric component sensor in a pattern over and in the vicinity of the selected area, measuring the concentration of a component of the atmosphere at one or more points along the pattern with the atmospheric component sensor to obtain concentration data, obtaining supplementary data, and using an inverse dispersion technique, that utilizes the concentration data with the supplementary data to detect and locate one or more sources of emissions, and to determine the emitted mass release rates and/or surface fluxes.

Abstract: A method of determining the position and emission rate of at least one source of emanations into an intervening medium, which method comprises measuring the concentration of the emanations in the intervening medium at selected measurement locations to obtain observed data, and measuring the velocity of the intervening medium; postulating a dispersion model; postulating a source model containing source parameters, such as the position(s) of assumed source(s) and assumed emission rate(s); calculating with the dispersion model for a postulated source model the concentration that would arise at the measurement location(s) to obtain synthetic data for the postulated source model; comparing the synthetic data with the observed data to obtain the source model that gives the closest fit; and outputting the position and emission rate of the at least one source assumed in the source model that gives the closest fit.

Abstract: A method of determining the position and emission rate of at least one source of emanations into an intervening medium, which method comprises measuring the concentration of the emanations in the intervening medium at selected measurement locations to obtain observed data, and measuring the velocity of the intervening medium; postulating a dispersion model; postulating a source model containing source parameters, such as the position(s) of assumed source(s) and assumed emission rate(s); calculating with the dispersion model for a postulated source model the concentration that would arise at the measurement location(s) to obtain synthetic data for the postulated source model; comparing the synthetic data with the observed data to obtain the source model that gives the closest fit; and outputting the position and emission rate of the at least one source assumed in the source model that gives the closest fit, wherein the concentrations of the emanations are measured by point measurements using an ultra-sensitive