Hello Wen,
thank you very much for providing this update to the work described in your earlier post and for sharing your code modifications with the community both as part of this post and your organization’s github pages. This is much appreciated.
I just wanted to let you know that due to recent staff departures and retirements, the CMAQ team at EPA is not currently in a position to review the code changes you implemented and we also have no current plans for implementing and testing USGS28 support in CMAQ.