By P. Lacomme, J. C. Marchais, J. P. Hardange, E. Normant
This new name presents a complete account of the present kingdom of the most sorts of airborne and spaceborne radar platforms. each one process is roofed by way of the elemental radar ideas, services and homes, in addition to the radar's function in the total process and venture. Given altering operational necessities, the authors additionally think of how radar could evolve into the long run. The publication merits from the information of the writer staff, who're operating in a firm thought of to be a centre of excellence for advertisement radar development.
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Extra resources for Air and Spaceborne Radar Systems (Radar, Sonar, Navigation and Avionics Series)
3 W ------------------ ( π ) 5 *U λ - yields the power budget Replacing Sef with ----------π 3U * W *U λ σ -. 3 W -------------------- ( π ) 5 Remarks • For a monostatic radar (one that uses the same antenna for transmission and reception), Gt = Gr = G. • • Pe and Pr designate either peak power and mean power. For ease of measurement, transmitted power is generally measured directly at the transmitter output, and received power is measured directly at the receiver input. 3). /DFRPPH5DGDUERRN 3DJH 0RQGD\ )HEUXDU\ 30 Chapter 3 — The RADAR Equation 25 lt Pt lr Pr Transmitter l = lt .
Ground Surveillance aims to acquire the general battlefield situation. ). 2 Reconnaissance Once an action is decided, reconnaissance aims to give to field players, at a tactical level, the information they need: Where are (and where will be) the targets, what are their defenses, what military means to use, what kind of weapon is the best suited, when to conduct the attack, etc. Due to short reaction time in Air Defense, this task is generally carried out directly by the AEW system. In fact in some cases the AEW platform is a C3I system itself that controls the fighters in real time.
Remark Reflection is a particular disturbance for radars operating close to the ground (or the sea), such as naval fire control radars, because the point targeted oscillates between the target and its image and can even be located outside this segment due to the glint phenomenon (see Chapter 3). /DFRPPH5DGDUERRN 3DJH 0RQGD\ )HEUXDU\ 30 Chapter 4 — Propagation 39 It is therefore essential to take into account the reflection coefficient ρ in order to anticipate these phenomena. The coefficient ρ depends on a great number of factors, including the following: • • • the nature of the terrain the wavelength the polarization of wave and incidence angle The Nature of the Terrain This is a vital component, particularly when wavelengths λ are small in relation to the roughness of the terrain, which is generally the case for radar waves.