Wonder if they have the detonation sensors like the old Vela birds? I’m sure it’s something way improved now.
I like how the geosync birds were described as having staring sensors, too.
I guess it is now called:
The program is now called the Integrated Operational NuDet (Nuclear Detonation) Detection System (IONDS).
https://en.wikipedia.org/wiki/Vela_(satellite)