So Himars is firing on the move then ? Or can just "unpack" so quickly and accelerate to 100 km/h.
Likewise I think you are not factoring in the other side of the equation here ... TOF or Time of Flight? These are not laser beams. Missiles and shells do not instantly bridge the gap from point of launch to target impact.
Consider;
- Time of Flight for a M30/M31 to climb high enough to be painted by a counter battery radar and a firing location calculated ... ? Say 30s to a minute
- Time to calculate firing solution?
- Time of Flight for say an Iskander M to reach the firing point from about 200km out? assuming 2km/s, that's also nearly 2 minutes
All in all, say 3 minutes.
I'm kinda think of the usual counter-battery scheme using Radar, pick the rocket in flight and determine the launch position from there and then launch Tochka with cluser warhead.
Ideally it should start right after the first rocket breaks the horizon as that is the first opportunity of detection, where rocket will show its Sides which have Large RCS. So when the Ballistic missile arrived the launcher will hopefully still be in vicinity. But yeah i guess it's way too sensitive to bureaucracy/chain of command issues.
The UAV patrol can work except that they will have to be deep within the enemy territory and take considerable time to search for target and may not be in the right place when the battery starts firing.
In an ideal situation with all the planets aligned, you have 3 minutes to hit a moving target with no means to refine a firing solution or provide terminal guidance cos you do not have eyes on target.
What can screw up the perfection?
Consider AFU attempts to combine SEAD missions with deep GMLRS strikes. Rudimentary as their SEAD capabilities may be, do you leave your CBR on constant illum for an ARM to come down your throat? If not, how does that affect your ability to detect and locate incoming?
Do you have a whole bunch of Tochka or Iskanders sitting around, immobile in ready to fire posture tasked solely to counter-battery? If not, add more minutes to the counter battery kill chain.
etc, etc, etc ...
So how far can a truck scoot in 3+ minutes? Far enough that you need not 1 Tochka/Iskander but many many to blanket the expanding circle that the Himars could have displaced to, even worse if the displaced location is a dug in shelter.
It's not bureaucracy or CC issues, it's just the realities of having the right pieces in the right places at the right time In The Real World™