[05]

> has access to a separate, encrypted, higher-precision GPS signal.

That's not it, though. This is available on the consumer L1 band, and you can even read that info using a $5 Ublox receiver (UBX-RXM-SFRBX command).

[kotaKat]

Yeah, but the DAGRs out there hop around on both sets. You can run a DAGR without keys and it'll use civ GPS just fine. It'd make sense to have the hidden OTAR/OTAP running on a hidden chunk of L1 traffic.

https://www.baesystems.com/en/product/defense-advanced-gps-r...