Thanks for the wiki link. I hadn’t seen that yet.
I’m suprised they’d go live with those limited sites. I’m assuming, based on that information, that PSP is using vehicle extenders?
Yes. The system is designed for mobile coverage, so in vehicle repeaters were planned for PSP to give trooper increased portable coverage beyond what they'll get with the new tower sites.
Look for portables in the 700MHz range as a possibility for the vehicular repeaters. Lots of open real estate there.