A gas leak detector comprising an inertial measurement assembly, a high precision gas analyzer, a wand having an inlet that receives ambient air and directs all or part of the ambient air to the high precision gas analyzer, the wand physically coupled to the inertial measurement assembly such that movement of the wand is detected by the inertial measurement assembly, a controller receiving signals from the inertial measurement assembly and the high precision gas analyzer, the controller including a processor and a memory device, the memory device including instructions that, when acted upon by the processor, cause the controller to: monitor the signals from the inertial measurement to identify real-time changes in a location of the inlet of the wand, log the changes in the location, monitor signals from the high precision gas analyzer indicative of the concentration of one or more particular types of fugitive gas dispersed in the ambient air, log the concentration of particular molecules of each of the one or more particular types of fugitive gas dispersed in the ambient air, apply an adjustment factor dependent on characteristics of the wand to the time series of the concentration of the particular type of fugitive gas in the air to offset the time series such that the measured concentration of the particular type of fugitive gas is aligned with the position of the inlet of the wand when the measured concentration entered the wand to create an adjusted concentration time series, and log the adjusted concentration time series with the changes in location time series to create a combined time series that includes both position and fugitive gas concentration data. an inertial measurement assembly, a high precision gas analyzer, a wand having an inlet that receives ambient air and directs all or part of the ambient air to the high precision gas analyzer, the wand physically coupled to the inertial measurement assembly such that movement of the wand is detected by the inertial measurement assembly, a controller receiving signals from the inertial measurement assembly and the high precision gas analyzer, the controller including a processor and a memory device, the memory device including instructions that, when acted upon by the processor, cause the controller to: monitor the signals from the inertial measurement to identify real-time changes in a location of the inlet of the wand, log the changes in the location, monitor signals from the high precision gas analyzer indicative of the concentration of one or more particular types of fugitive gas dispersed in the ambient air, log the concentration of particular molecules of each of the one or more particular types of fugitive gas dispersed in the ambient air, apply an adjustment factor dependent on characteristics of the wand to the time series of the concentration of the particular type of fugitive gas in the air to offset the time series such that the measured concentration of the particular type of fugitive gas is aligned with the position of the inlet of the wand when the measured concentration entered the wand to create an adjusted concentration time series, and log the adjusted concentration time series with the changes in location time series to create a combined time series that includes both position and fugitive gas concentration data. monitor the signals from the inertial measurement to identify real-time changes in a location of the inlet of the wand, log the changes in the location, monitor signals from the high precision gas analyzer indicative of the concentration of one or more particular types of fugitive gas dispersed in the ambient air, log the concentration of particular molecules of each of the one or more particular types of fugitive gas dispersed in the ambient air, apply an adjustment factor dependent on characteristics of the wand to the time series of the concentration of the particular type of fugitive gas in the air to offset the time series such that the measured concentration of the particular type of fugitive gas is aligned with the position of the inlet of the wand when the measured concentration entered the wand to create an adjusted concentration time series, and log the adjusted concentration time series with the changes in location time series to create a combined time series that includes both position and fugitive gas concentration data.