Nope!
12hrs for Global Express at 60kft on a transit is correct.
12hrs for a converted Global Express with a cut down U2 Radar in a draggy radome, satcom dome and extra weight of the kit onboard called "Sentinel" is incorrect. It also normally operates well below 60kft as well.
AAR capability on any asset is a massive force multiplier - only a fool would deny that. Therefore, AAR is highly desirable for Sentinel but was left off to save weight/space - so it could get nearer to the original 60kft (but not close enough).
iRaven