if what they are doing is jamming, then if you are getting timing information from a gps receiver and your receiver is in range of the jammer you will get the t

if what they are doing is jamming, then if you are getting timing information from a gps receiver and your receiver is in range of the jammer you will get the timing information from the jamming signal, so yes, however the USAF _might_ be including the correct timing information in their jamming signal in order to reduce any side effects of their exercise...