A laser profiler is operated at a wavelength of 1m from an altitude of 10000 m, and

Question:

A laser profiler is operated at a wavelength of 1μm from an altitude of 10000 m, and views at 45° to the nadir. Estimate the range corrections needed to account for the dry atmosphere and the water vapour component if the atmosphere contains 50 mm of precipitable water. The atmospheric pressure at 10000 m altitude can be taken as 0.26 atmospheres.