As I said, I think it pivots upwards, and I think the pivot point is all the way back here:If you look around a vulture with the external camera, there are numerous mechanical linkages surrounding the canopy that I believe are related to the canopy lifting upwards, and taking the dashboard with it, and under the dashboard I believe there is a sliding / folding ramp to bridge the last bit of that height gap.
Here's a little snapshot showing the linkages:
and another:
I don't know if you noticed but the dashboard seems to be supported on arms/legs growing out of the canopy rather than out of the floor? This observation in conjunction with the fact it has those mechancal linkages surrounding the upper part of the canopy, makes me think that the canopy lifts up a little bit.
Also, when you look at the cockpit you can see there is a distinct downwards ramp in the floor from just infront of the pilots seat to the tip of the canopy:
The Concept art from Ben Andrews on Artstation seem sto support that supposition, in that there is clearly complex geometry at the very tip of the floor under the scanner:
Image taken from: https://www.artstation.com/artwork/0BYa5