دورية أكاديمية
(RAT SCAT) LARGE OBJECT STUDY
| العنوان: | (RAT SCAT) LARGE OBJECT STUDY |
|---|---|
| المؤلفون: | Freeny, Charles C, Cahill, William P |
| المساهمون: | GENERAL DYNAMICS CORP FORT WORTH TX |
| المصدر: | DTIC AND NTIS |
| سنة النشر: | 1967 |
| المجموعة: | Defense Technical Information Center: DTIC Technical Reports database |
| مصطلحات موضوعية: | Active & Passive Radar Detection & Equipment, RADAR CROSS SECTIONS, RANGES(FACILITIES), TEST FACILITIES, ANTENNA RADIATION PATTERNS, COMPUTER PROGRAMS, DIELECTRICS, LENS ANTENNAS, MATHEMATICAL MODELS, MEASUREMENT, NOSE CONES, PHASE(ELECTRONICS), RADAR ANTENNAS, RADAR TARGETS, RANGE(DISTANCE), SIMULATION, STATISTICAL ANALYSIS, SUBROUTINES, SURFACE PROPERTIES, TEST METHODS, THEORY, COMPUTER ANALYSIS, FAR FIELD, NEAR FIELD, RAT SCAT, SIZES(DIMENSIONS) |
| الوصف: | The investigation reported herein has been directed to defining an optimum means of implementing a capability for measurement of large-object radar cross section at the Radar Target Scattering Site, White Sands Missile Range. The required capability is that of accommodating targets up to 60 feet in length, over a frequency range of 0.03 to 12 gigahertz, and maintaining the present RAT SCAT measurement accuracy. The primary trade-off feature in this study was the requirement for range length, which exceeded 16 miles in the case of the most straight-forward approach to large-object measurement. This condition is commonly defined by R less than 20 sq/wavelength when D is the minimum target dimension. Four basic measurement methods were analyzed in this investigation: (1) scaling, wherein the target size and range length are reduced via the well-known scaling laws; (2) long range and high power, wherein a range length of 20 sq/wavelength is used; (3) antenna far field simulation, wherein a dielectric lens is used to partially correct the phase of the incident illuminating field; and (4) analytical correction of near field data, wherein data obtained at R greater than 20 sq/wavelength is analytically processed to obtain data equivalent to that at R = 20 sq/wavelength. The study conclusions are based on extensive theoretical investigation and experimental testing. Over 200,000 IBM 7090 computations and 250 experiments were performed. A trade-off study was conducted in order to uniformly evaluate the impact of the selection of the several methods. The final selection represents a combination of the long-range, and high-power, and antenna far-field simulation methods. |
| نوع الوثيقة: | text |
| وصف الملف: | text/html |
| اللغة: | English |
| العلاقة: | http://www.dtic.mil/docs/citations/AD0822284Test |
| الإتاحة: | http://www.dtic.mil/docs/citations/AD0822284Test http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0822284Test |
| حقوق: | Approved for public release; distribution is unlimited. Document partially illegible. |
| رقم الانضمام: | edsbas.5218EB35 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |