Recent Advancements in Basic Radar Range Calculation Technique

Radar/Radio Tropospheric Absorption and Noise Temperature

“…The work described updates earlier work begun in 1958, described in various NRI, reports and other writings (2)(3)(4)(5)(6)(7)(8). The original work (2,4,6) resulted in curves plcttcd manually from manual calculations for frequencies from 100 MHz to 10 GHz.…”

A Guide to Basic Pulse-Radar Maximum-Range Calculation. Part 1. Equations, Definitions, and Aids to Calculation

“…A paper further updating the subject was published by Blake (12) in 1961. It applied recent advances in system-noise-temperature calculation, atmospheric absorption, plotting of coverage diagrams for a realistic refractive -index model, and multipath interference calculation.…”

“…(10), (12), and (13) accounts for the fact that if B, is not the optimum value, a larger value of V is required, whereas V 0 is defined as the optimum-bandwidth value. Therefore CB Ž-1.…”

“…(19) and (20),by calculating p, and p•, for the integrator output rather than for the receiver output before integration. Such calculations are quite complicated, but they have been carried out for many cases of interest (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). A representative set of curves is presented in Figs.…”

“…(12). If the jamming noise power density is assumed to be much larger than the receiver noise in the absence of jamming, the equation is derived by replacing the noise power density kT.…”