GAS FLUX DETERMINATION USING AIRBORNE DIAL LIDAR AND AIRBORNE WIND MEASUREMENT

摘要

A system for obtaining emission flux of a gas plume, emanating from a source,includes an airborne differential absorption lidar (DIAL) system fordeterminingmultiple concentration path length (CPL) values along a flight path; and anairbornewind measuring system (WMS) for determining a wind vector at the aircraftaltitude.Also included is a processor for receiving the multiple CPL values determinedby theDIAL system and the wind vector determined by the WMS. The processor uses theCPL values to compute either (a) an area-integrated concentration (AIC) valueor (b)an average concentration value over a cross-plume extent, defined along thelengthdimension of the flight path. The processor also scales the wind vector to thenearground altitude level of the gas plume to obtain a scaled wind vector. Theemissionflux is obtained by multiplying either the AIC value or the averageconcentration valuewith a component of the scaled wind vector. The component of the scaled windvectoris defined by a vector perpendicular to the length dimension of the flightpath.