Correct on both counts Gorlom. The shooter was standing and the trooper in the line of fire is the 'blocker'.
When the shooter is kneeling the matrix looks like this:
Blocker kneeling :
snap : hit 48%, block 13%
normal : hit 66%, block 20%
aimed : hit 69%, block 22%
Blocker standing :
snap : hit 26%, block 44%
normal : hit 16%, block 65%
aimed : hit 10%, block 72%