I did a really quick skim of the program and didn't really see remote sensing. It looks like the program does collect data reports and map them - which is always nice.
I did pick up this "For reporters subject to the California Cap-and-Trade Program, submitted data are verified by a CARB-accredited independent third-party verifier." Is it the remote sensing satellite that is a third-party verifier?
See at the bottom -- a third-party will fly a plane in circles around the site to measure all concentrations in a surface enclosing the site. The concentrations, plus wind speed, give the site emissions. (I think that's intuitive, but it's also the divergence theorem from vector calculus.)
That's a lot of work to get just one day's emissions. And there are technical issues already because you want to get the whole surface concentrations+windspeed at the same time, but you can't, because the plane has to circle the site over many hours.
Despite those cautionary footnotes, this approach is used in calibration/validation of the concentration/emission relationship. Getting it all quantitatively right, as opposed to just seeing a plume, is a complex problem. People are still exploring how it can all work together (space, airborne, in situ, plus modeling).
I did pick up this "For reporters subject to the California Cap-and-Trade Program, submitted data are verified by a CARB-accredited independent third-party verifier." Is it the remote sensing satellite that is a third-party verifier?