Ah, a very plausible explanation!
https://avbrief.com/overnight-gps-testing-affects-huge-area-...
The map indicates it will be centered on Lampasas and the region of effect seems to be east of El Paso. So, if the GPS exercises are the cause, the TFRs would've been more likely to bring in Austin, Dallas, and San Antonio.
Isn't it possible that a 10-day TFR could be lifted early once the concern is past? They've probably made it 10 days just to establish an upper bound.
Wait so people in South Texas won't be able to use GPS on the ground either?
Also if the goal is to disrupt the cartels and the people using GPS to know where they are at in the process of crossing the border illegally why is the Army involved in this at all?
The Army has no business in taking part of operations to disrupt cartels and illegal immigration, it's the whole rational behind having 3 letters agency including the evil one that rose to prominence lately
[1] https://www.spaceforce.mil/About-Us/Fact-Sheets/Fact-Sheet-D...