For a spatial reference point, I'll use the outer edge of the detached haze layer. This feature seems to show up in both the CL1 VIO and the CB2 CL2 filtered images.
So the mapping of the haze layers will be
downward from the outer edge of the detached haze layer.
(Anyone got a reference for the altitude of the outer edge of the haze layer from the surface?)
Using the recent Planetary Photojournal images (and reported pixel scales), here are two crops of the haze structure from PIA11485 and PIA11468.
Lining them both up and assuming similar structures, the measured pixel values translated to distance seems to match up. The detached haze layer is about 60 km thick, and the distance from the outer edge of the detached haze layer to the outer edge of the inner thicker haze layer (but still blue scattering) is about 150 km.
Click to view attachmentLacking an absolute scale, I'll assume the haze structure is the same in the May 5th images and that the distance from the outer edge of the detached haze layer to the inner thicker haze layer is still about 150 km.