We have put ViridiScope on several different platforms over the years, including wall-climbers, but the simplest and most effective solution for pond walls is a pole.
The laser sampling head is attached to an extendable pole that is lowered manually to the required sampling position. Sensors on the head ensure that ViridiScope is in contact with the surface to be sampled. It takes just two minutes to collect sufficient material for in situ characterisation of the concrete...