By P. Lacomme, J.C. Marchais, J.P. Hardange, E. Normant

ISBN-10: 0852969813

ISBN-13: 9780852969816

This advent to the sphere of radar is meant for genuine clients of radar. It makes a speciality of the background, major ideas, capabilities, modes, houses and particular nature of recent airborne radar. The publication examines radar's position in the method while conducting is assigned missions, exhibiting the probabilities of radar in addition to its barriers. eventually, given the altering operational specifications and the aptitude unfolded by way of sleek technological advancements, a concluding part describes how radar may perhaps evolve within the future.The authors evaluation the present kingdom of the most sorts of airborne and spaceborne radar platforms, designed for particular missions in addition to for the worldwide surroundings in their host airplane or satellites. They comprise various examples of the parameters of those radars. The emphasis within the booklet isn't just on a specific radar method, yet both at the major radar capabilities and missions. whether a variety of ideas are defined during this ebook, the point of interest is on these that are attached to functional functions.

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8). 8 Radio Horizon In order to take this into account, we assume that radar waves move in a straight line and that the Earth’s radius is greater than its real value by a factor of approximately 4/3. 9. 9 Radar Horizon /DFRPPH5DGDUERRN 3DJH  0RQGD\ )HEUXDU\    30 44 Part I — General Principles Remark Given that the radius of curvature of the wave path is greater than that of the Earth, in comparison with flat ground, the waves appear to be deviated upwards. We can therefore define a modified index Q' , whose variation with h is positive in a standard atmosphere.

25 , = dh RT where RT is the earth’s radius. The principle of refraction is well known in optics. The angle of incidence i and the angle of refraction r are linked by the equation Q  ⋅ VLQ L Q  ⋅ VLQ U , where n1 and n2 are indexes of the mediums 1 and 2. 7) whose index decreases with h, the wave path will gradually be deviated and directed towards the Earth. 7 Refraction in Standard Atmosphere Consequently, the path followed by electromagnetic waves is not a strictly rectilinear trajectory. 8).

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. For ground targets, due to slower evolution of the situation and to a more complex environment (collateral damage avoidance, mask), a specific mission is needed. This mission uses SAR/MTI systems either fitted in POD carried by a manned aircraft (business jet or fighter), or carried by an unmanned vehicle (UAV).

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Air and Spaceborne Radar Systems: An Introduction by P. Lacomme, J.C. Marchais, J.P. Hardange, E. Normant

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