Interception Clarification

[Underdog Ally]

I have read many posts about how air combat works but I haven’t found anything up to date / current (for BTS 3.19)

From what I understand:
-Air unit interception rate is 100% at full health, but drops proportionately based on injury amounts 90% HP = 90% chance

-Ground unit (Sam infantry) interception rate is constant regardless of health/strength

-Ground units can not intercept if out of movement points on previous turn?

-Only 1 ground unit gets a chance to intercept so having 5 mobile Sam is the same as having 1?

Any confirmations, tips, and insights into 3.19 air combat understanding is appreciated

 

[pob]

AFAIR, ground units have to not have moved at all on the previous turn.
Each ground unit can only try to intercept once per turn (planes can intercept multiple times).
While having multiple mobile sams won't help if only one plane is attacking, it would help if many planes were attacking.