Height normalization - CL61

CL61 User Guide

Document code
M212475EN
Revision
D
Language
English (United States)
Product
CL61
Document type
User guide

Assuming a clear atmosphere, the power of the return signal (Pr) is inversely proportional to the square of the distance. It means that the signal strength from 304.8 m (1000 ft) is generally hundred times stronger than from 3048 m (l0 000 ft).

The height dependence is eliminated by multiplying the measured signal value with the square of height (height normalization). Noise, however, being height-independent from a measurement point of view, is then correspondingly accentuated with increasing height.