The "Save the Idiot" mission?
The scenario starts from Drank's point of view, EVA high above Europa.
The DG IV, is on the nightside, and does appear to be above ground. But I think it's a mesh, texture thing (hard to explain).
If you sacrifice Joe, you can fast forward the time index until the sun rises. You'll see that it's parked on the surface. Move the camera around and you'll see the DGIV shadow. It does look kind of odd to swivel the camera view around too far to the side. If you do that it does appear that the DG is floating above the surface. It's just a current limitation. In the meantime, just go with it, you've got an idiot to save before he runs out of O2. Who hired this Joe Drank guy anyway?