Gases from anthropogenic sources have the potential to have a profound impact on air quality. Emissions from large cattle feedlots and oil and natural gas sites are comprised of ammonia (NH3) and ethane (C2H6) as pollutants, respectively. For the measurements of total column densities the Solar Occultation Flux (SOF) method is applied. SOF measurements use direct sunlight as source of energy to determine vertically integrated concentrations of trace gases. The measurement of total column abundance ultimately allows the emission flux and source strength to be determined when driving a closed box around or upwind and downwind of a source with the mobile laboratory and knowledge of wind fields. A commercial Bruker EM27 FTIR, covering a wide spectral range in the mid-IR, was coupled to the CU mobile solar tracker in Northern Colorado during FRAPPE to measure total column density of NH3 and C2H6.