TABLE OF CONTENTS | A | Effective antenna aperture area | |
| A A | Antenna area | |
| A E | Effective aperture area of a phased-array element in the array; area of corner reflector projected in the direction of radar | |
| A R | Receive antenna effective aperture area | |
| A S | Surface area contributing to clutter | |
| A T | Transmit antenna effective aperture area | |
| A ? | Array effective aperture area at scan angle | |
| a | Target dimension; clutter scattering-effectiveness parameter; parameter in burnthrough equation | |
| a(x) | Antenna current density as a function of distance from the antenna center | |
| a A | Azimuth acceleration of scanning beam | |
| a AM | Maximum antenna acceleration in azimuth direction | |
| a EM | Maximum antenna acceleration in elevation direction | |
| a R | Target radial acceleration; rain attenuation in decibels per kilometer | |
| a T | Maximum target acceleration; tropospheric attenuation in decibels per kilometer | |
| B | Signal bandwidth | |
| B A | Phased-array bandwidth | |
| B i | Receiver bandwidth for search train i | |
| B J | Bandwidth of noise jammer | |
| B N | Noise bandwidth | |
| B R | Receiver bandwidth | |
| B S | Subpulse bandwidth | |
| b | Parameter in burnthrough equation | |
| C | Power at the radar receiver output due to clutter of chaff return signals | |
| CR | Clutter cancellation ration; chaft cancellation ratio (both normally greater than unity) | |
| c | Electromagnetic propagation velocity in a vacuum (3 10 8 m/s) | |
| D | Target cross-range separation; spacing of DPCA antenna phase centers | |
| D A | Dimension of chaff in resolution... |
