K Factor

The relative measure of a sensors ability to distinguish one object from another. Theoretically (but not in practice) it is the distance between the mean locations of two observed objects given normal distributions and standard deviations for both objects.

In tropospheric radio propagation, the ratio of the effective Earth radius to the actual Earth radius. Note: The k-factor is approximately 4/3. 2. In ionospheric radio propagation, a correction factor that (a) is applied in calculations related to curved layers, and (b) is a function of distance and the real height of ionospheric reflection.