ac

alternating current

A _c

radar range-azimuth footprint area on earth's surface

A/D

analog-to-digital

ADC

analog-to-digital converter

AEW

airborne early warning

AEW&C

airborne early warning and control

AFC

automatic frequency control

AI

airborne intercept

AMTI

airborne MTI

ARM

antiradiation missile

ASW

antisubmarine warfare

ATC

air traffic control

ATD

automatic target detection

ATR

automatic target recognition

AWACS

airborne warning and control system; frequently used instead of Sentry, the official designation for E-3 AEW

AWG

American wire gage

b

bit

c

radar and radio propagation speeds, approximately 3 10 ^-8 m/s in earth's atmosphere

C ²

command and control

C ³

communications, command, control

C ³I

communication, command, control and intelligence

C band

includes 5 GHz (see Table 4.4)

CA-CFAR

cell-averaging CFAR

CFAR

constant false alarm rate; also, a circuit for maintaining CFAR

cm

centimeter

COHO

coherent oscillator

COMMINT

communications intelligence

CPU

central processing unit

CRT

cathode ray tube

CW

continuous wave

D/A

digital-to-analog

dB

decibel

dBm ²

decibel relative to a square meter

dc

direct current

deg

degree

DF

direction finder

DFT

discrete Fourier transform

DOA

direction of arrival

DPCA

displaced phase center antenna

E-2

USN-developed, carrier-based AEW system on Grumman aircraft; versions include E-2A, E-2B, E-2C

E-3

USAF-developed AEW system on Boeing 707 aircraft; versions now include E-3A, E-3B, E-3C, E-3D

ECCM

electronic counter-countermeasures

ECM

electronic countermeasures

EHF

extremely high frequency

ELF

extremely low frequency

ELINT

electronic intelligence

EM

electromagnetic

EMC

electromagnetic compatibility

EMI

electromagnetic interference

EO

electro-optical

ESM

electronic support measures

EW

electronic warfare

FAA

Federal...