From Introduction to Electronic Defense Systems, Second Edition
Glossary
- ?
- absorptance
- ?
- difference channel of a monopulse radar
- ? f
- frequency interval or difference
- ?
- emissivity; also a general measure of precision
- ? _{B}
- width at half-power (-3 dB) beam (i.e., angle within which the power of the transmitted signal is more than half its maximum level)
- ? _{q}
- squint angle
- ?
- wavelength: distance between two adjacent peaks on a sinusoidal wave; for an electromagnetic wave the wavelength is given by c/f where c is the velocity of light and f is the frequency of the wave
- ?
- reflectance or reflection coefficient
- ? _{r}
- reflection coefficient of a rough surface
- ? _{s}
- specular reflection coefficient
- ?
- sum channel of a monopulse radar
- ?
- Stefan-Boltzmann constant
- ?
- equivalent area
- ?
- standard deviation (i.e., square root of the variance of a probability distribution; a quantity whose values have a Gaussian distribution has a 67% probability of being within ? of the mean; 90% probability of being within 2 ?; 97% probability of being within 3 ?)
- ? _{p}
- standard deviation of a quantity with zero mean
- ?
- pulse duration, pulsewidth (PW)
- ? _{a}
- atmospheric transmittance
- ? _{0}
- transmittance of optical system
- ?
- phase or phase shift angle
- ?
- field of view, measured as a solid angle
- ?
- angular velocity or angular frequency of a signal
Symbols
- AAA
- anti-aircraft artillery
- AAM
- air-to-air missile
- ac
- alternating current
- A/D, ADC
- analog-to-digital converter
- a _{e}
- radius of the Earth (8.5 10 ^{6}ms)
- A _{eff}
A-C
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