烧瓶
发表于 2025-3-25 04:09:25
Data Processing and Reduction,g with a few patterns, it can be overwhelming when several dozen such patterns must be compared and analyzed, relative RCS values extracted, and conclusions drawn about their implications. For comparison purposes, therefore, the analyst often relies on smoothed data from which the rapid fluctuations have been filtered by statistical processing.
Flatter
发表于 2025-3-25 09:17:57
Radar Imagery,h specialized software. The discrete Fourier transform (DFT) is the primary tool used in the processing, and in examples presented in this chapter we rely on the fast Fourier transform version (FFT) of the DFT, based on powers of 2. Two such transformations are involved.
rectum
发表于 2025-3-25 15:19:24
Compact Ranges,ficient internal projects to support its compact range, McDonnell Douglas attempted to peddle its facility in the early 1990s to any and all customers who could afford the $12500 shift charge for eight hours of chamber use . Whether the marketing scheme was successful or not, the facility and its capabilities were impressive.
Range-Of-Motion
发表于 2025-3-25 18:45:26
Radar Cross Section Fundamentals, in the trade, can be stated in very simple terms: it is the projected area of an electrically large, perfectly conducting sphere whose echo strength would match that of the target if we were to replace the target with the sphere. By . we mean a sphere at least several wavelengths in diameter, and t
传染
发表于 2025-3-25 23:12:29
http://reply.papertrans.cn/83/8204/820384/820384_25.png
时代
发表于 2025-3-26 03:06:26
Target Support Structures, order of their development. The three are plastic foam columns, string suspension systems and the metal pylon. Foam columns and string supports are more often used in indoor test chambers than on outdoor test ranges, while the metal pylon (almost always called . by range crews) is a more common sup
男学院
发表于 2025-3-26 04:59:42
http://reply.papertrans.cn/83/8204/820384/820384_27.png
ablate
发表于 2025-3-26 09:19:16
Outdoor Test Ranges,: the ground itself. We resort to idealizations of the ground plane using omnidirectional antennas at first, but then we become a bit more realistic by investigating the effects of directive antennas and imperfectly conducting soils. At the end of the chapter we analyze two methods of defeating the
irreparable
发表于 2025-3-26 13:05:47
http://reply.papertrans.cn/83/8204/820384/820384_29.png
Exonerate
发表于 2025-3-26 19:29:45
Compact Ranges,n environment persists. Impelled by requirements to measure the RCS characteristics of large airframe components, such as those found in the Stealth Bomber and the Advanced Tactical Aircraft, at least two large airframe manufacturers built compact ranges of unprecedented size in the late 1980s. Desp