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AMENDED SHEET (ARTICLE 19) The method of claim 1, wherein a UAV-based data comprises one or more of: a throttle response, a pitch, a roll, and a yaw. The method of claim 1, wherein the two or more altitudes comprise one or more of: a real anemometer altitude, an altitude where highest concentrations of trace gas are measured, a building height, and an estimated building height. The method of claim 1, wherein the two or more altitudes comprise one or more of: a real anemometer altitude, an altitude where a highest concentration of trace gas is measured, a building height, an estimated building height, and a displacement height. The method of claim 1, wherein the determined error between the received wind data and the second wind model is a least square residual error. The method of claim 1, wherein a wind speed measured by the secondary wind measurement device is at least one of: higher than an actual wind speed and lower than the actual wind speed. The method of claim 12, wherein the one or more key parameters are adjusted based on the wind speed measured by the secondary wind measurement device. A system (501) comprising: a first stationary anemometer (518) configured to generate wind data; a second stationary anemometer (521) configured to generate wind data; a third-party meteorological data service (520) configured to provide wind data; an unmanned aerial vehicle (UAV) (522), wherein the UAV (522) comprises one or more of: a control system (524), a global positioning sensor (GPS) (526), a trace gas sensor (528), a LIDAR sensor (530), a barometer sensor (532), a thermistor sensor (534), and an anemometer (535); a processor (536) in communication with one or more of: the first stationary anemometer (518), the second stationary anemometer (521), the third-party meteorological data service (520), and the unmanned aerial vehicle (UAV) (522), where the processor is configured to:

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AMENDED SHEET (ARTICLE 19) determine, by an initial parameter component (538), an initial parameter guess (502); determine, by a first wind data component (540), a first wind data from at least one of the first stationary anemometer (518) and the third-party meteorological data service (520); generate, by a first wind model component (542), a first wind model (506) based on the determined initial parameter component and the determined first wind data; determine, by a second wind data component (544), a second wind data from the anemometer (535); process, by an optimizing algorithm component (548), the generated first wind model (506) via an optimizing algorithm (510); generate, by a second wind model component (546), a second wind model (512) based on one or more of the optimizing algorithm (510) and the first wind data; generate, by the concentration and position data component (550), a trace gas data from data from the trace gas sensor (528) and the GPS (526) of the UAV (522); and determine, by the flux calculation component (552), an elevated trace gas concentration based on the generated trace gas data and the second wind model (512). The system of claim 14, wherein a wind speed measured by the anemometer (535) is at least one of higher than an actual wind speed and lower than the actual wind speed. The system of claim 15, wherein the second wind model component (546) is generated based on the wind speed measured by the secondary wind measurement device.

AMENDED SHEET (ARTICLE 19)