I was struck by the first paragraph on p.166 relating to Huygens:
The SSP tilt sensors and the HASI accelerometer both seemed to indicate the probe was tilted by several degrees relative to the local vertical. But the horizon on the DISR images was pretty horizontal. It seemed unlikely that the ground would be sloping so steeply. Were some of the sensors wrong - and if they were, why did they agree with other factors? Maybe the probe had bent out of shape, changing the relative alignment. In fact, it would be impossible to know.
Reading this makes me want to view for myself the surface image oriented as the instruments indicate it should be, rather than on the assumption of a horizontal skyline. Just how implausible would it look? Presumably the imaging team did this, but perhaps that was before we knew how surprisingly high some of the 'pebble banks' near the landing site are. We only see one short section of the skyline after all.
Could Ralph or anyone provide a version of the image rotated accordingly?
EDIT - Or a version of the surface image annotated with the position of the theoretical horizon determined from SSP and HASI?