Overpasses 2 through 7 on Site 4 primarily detected larger emissions (> 1 kg/hr). As discussed in the near real time quantification section, CMS-based rate estimates at the 30minute scale vary widely between CMS solutions and quantification algorithms (see Figure ). This is also seen in Figure , with CMS rate estimates ranging from -198% to 526% of the corresponding aerial rate estimates on this site. Averaging the CMS rate estimates across solutions and quantification algorithms results in closer agreement with the aerial estimates, with CMS averages ranging from -25% to 292% of the aerial estimates on this site. Solid bars labeled "Open-Source" show inventories created using rate estimates from the DLQ algorithm applied to the raw concentration data from the CMS solutions. Lighter, cross-hatched bars labeled "Vendor" show inventories created using the vendor-provided rate estimates. The letters "A", "B", and "C" above "Open-Source" and "Vendor" bars denote the solution the respective inventory comes from. Brown solid bars labeled "Bottom-Up" show the site-level bottom-up inventories provided by the oil and gas operators. Black lines show 95% confidence intervals. Each inventory is normalized to 30 days.