
The other bird in that image is a DHC-6 (DeHavilland Twin Otter).
It is fitted with an ‘orbital’ radar system and is used as a localized central signals “station” or Air Traffic Control for such events.
Hmm, game isn’t played until Tuesday, but the parade is today, so maybe that was the flyover.
Copperheads
161st Air Refueling Wing
https://en.wikipedia.org/wiki/161st_Air_Refueling_Wing
https://www.161arw.ang.af.mil/
http://www.militarybases.us/air-force/sky-harbor-air-national-guard-base/
See image - bottom left - first page >>>
https://www.161arw.ang.af.mil/Portals/53/documents/AFD-170515-001.pdf?ver=2017-05-15-122703-303