Remote sensing and Digital image processing

A: The correct value preserves geometric similarity so the DEM slope error stays bounded in the braking calculation. Option A drops focal length entirely, inflating GSD by two orders. Option B treats orbital imaging like a UAV camera, shrinking scale unrealistically. Option D mixes metres and millimetres, a unit slip that looks tidy but breaks dimensional consistency.

A: The selected action limits exposure by avoiding cross-pol ambiguity while preserving traceability. Option A ignores processing-chain sensitivity to polarization order. Option B is safe but fails the operational constraint of same-day commissioning without mitigation. Option C invents data that doesn't exist and hides the interface fault.

A: That element constrains elevation error propagation into gradient and deceleration margins. Option B aids audit but doesn't quantify error. Option C affects interoperability, not physics. Option D omits the vertical reference that drives braking force components.

A: Addressing galvanic couples prevents rapid loss of enclosure integrity that would corrupt image timing. Option A underplays chloride-driven attack rates. Option C presumes an impressed-current system that's not present. Option D matters long term but doesn't set first-failure risk here.