I tracked an rc135 from Offutt to mcdill the other night, it changed call sign mid flight and if I hadn't seen it at take off I wouldn't have known origin.
I wonder if this new mod they are discussing is for space force comms that are "off earth" comms, like space station, etc. Just an idea... https://www.thedrive.com/the-war-zone/31346/rc-135-rivet-joint-surveillance-jet-emerges-with-puzzling-new-modification

I tracked an rc135 from Offutt to mcdill the other night, it changed call sign mid flight and if I hadn't seen it at take off I wouldn't have known origin.

https://www.thedrive.com/the-war-zone/31346/rc-135-rivet-joint-surveillance-jet-emerges-with-puzzling-new-modification