STILT footprints of seven methane spikes and two background levels as of January 2021

The dataset includes the STILT footprints for the seven methane spikes as reported in Webster et al. (2018, 2021) and the two background signals detected before the sixth methane spike and after the seventh methane spike. Each footprint file is an average over the footprints from thirty-five (for Spikes 1-6 and the background level before Spike 6) or twenty-eight (for Spike 7 and the background level after Spike 7) STILT simulations. The domains and the spatial resolutions of the footprints are different, as indicated by d01, d03, or d05 in the file names.