plan-position indicator
111height hole — The blank area in the center of a plan position indicator type radarscope display caused by the time interval between the transmission of a pulse and the receipt of the first ground return. No targets can be detected within the height hole …
112interrogator — i. A radar set or other electronic device that transmits an interrogation. Normally, ground based surveillance radar beacon transmitter receiver scanning in synchronism with primary radar continuously transmitted signals requesting replies from… …
113MTI radar — Radar in which the Doppler effect can be employed to differentiate between stationary and moving targets, with the former suppressed and only the latter displayed. In this process, the permanent echoes as well as those from very slow moving… …
114P-scope — A radar display that has a radial time base rotating in synchronization with a beamed aerial system. The target appears as blips or pips on the trace. The range is measured along the time base and bearing obtained by angular positions of the time …
115target signal — The radar energy returned to a radar by a target. Also called an echo signal or a video signal. The amount of this energy is called received power. The size of the echo on the PPI (plan position indicator) is a direct function of the received… …
116terrain-avoidance radar — A special radar that permits aircraft to be flown safely at a preset clearance level. A normal PPI (plan position indicator) radar enables the terrain to be avoided in azimuth rather than in elevation. A specialist terrain avoidance radar, on the …
117time base — The fundamental trace on a cathode ray tube providing the time scale against which measurements are made. Plan position indicator (radar display) …
118window — i. Any device introduced into the atmosphere to produce an appreciable radar echo, usually for tracking some airborne device or tracing the wind. ii. A World War II code name for a type of radar jamming device employed to confuse the operators of …
119PPI — abbr. Plan Position Indicator (in radar) …
120Rundsichtanzeigegerät — panoraminis rodytuvas statusas T sritis radioelektronika atitikmenys: angl. plan position indicator vok. Rundsichtanzeigegerät, n; Rundsichtbildschirm, m; Rundsichtgerät, n rus. индикатор кругового обзора, m; панорамный индикатор, m pranc.… …
