We looked at GHGSat back in 2016, really interesting tech and solid approach, with more limitations than expected (only land-based sites can be measured). They

We looked at GHGSat back in 2016, really interesting tech and solid approach, with more limitations than expected (only land-based sites can be measured). They ultimate got investment from a collaborative vehicle. I believe they deserve to exist in this world, though I do still wonder if their business model is self-sustaining.