Method for optimizing the pointing of an antenna of an airborne radar system

摘要

Method for optimizing the pointing in elevation of an antenna of a radar system (1) airborne at an altitude h comprising an antenna and processing and calculation means, the method comprising: a. the selection of an area of interest (2) b. the calculation of atmospheric losses Lref at a reference altitude href at the reference range Dref and the calculation of a reference criterion Kref = -40 log10 (Dref); vs. for each possible pointing distance in elevation of the antenna Dpt of the area of interest, the calculation of the antenna site S making it possible to target the distance Dpt by the center of the antenna; d. for each distance D from the domain of interest, the calculation of the angle θ under which the antenna observes the point of the ground at the distance D and the calculation of a criterion; 1. K (D) = Ge (θ) + Gr (θ) -40log10 D + Lref (href, Dref) Latmo (h, D) 2. Where Ge (θ), Gr (θ) are respectively the gains of l '' antenna for transmission and reception; e. the calculation of the set of distances D which, for this pointing distance Dpt check the relation K (D) Kref so as to obtain the start and the end of the sub-swath actually exploitable by the radar system; and calculate the really exploitable sub-mowns to be juxtaposed (A, B, C) to cover the entire area of interest without discontinuities.