时间：2011-07-29 09:39来源：蓝天飞行翻译 作者：航空 点击：次
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PIO Processor Input/Output PIREP Pilot Report Pitot Pressure The sum of the static and dynamic pressures and is the total force per unit area exerted by the air on the surface of a body in motion. Pitot Tube A forward facing probe attached to the outside of the aircraft to sense the relative pressure of the aircraft moving through the atmosphere. Named for Henri Pitot who first used this method of measuring fluid flow pressure. PLA Power Level Angle PLL Phase Locked Loop PM Phase Modulation PMA (1) Permanent Magnet Alternator (2) Parts Manufacturing Approval PMAT Portable Maintenance Access Terminal PMC Provisional Memory Cover PMG Permanent Magnet Generator PMOS P-Type Metal Oxide Semiconductor PN Pseudo Noise PNCS Performance Navigation Computer System PNEU Pneumatic POC (1) Proof Of Concept (2) Point of Contact Polled Mode An ACARS mode of operation in which the airborne system transmits only in response to received uplink messages (polls). POR Pacific Ocean Region POS Position POS/NAV Positioning/Navigation POT Potentiometer PPI Planned Position Indicator. A type of radar display which shows aircraft positions and airways chart on the same display. PPM (1) Pulse Position Modulation (2) Parts Per Million PPS Precise Positioning Service P/RAT Prediction/Resolution Advisory Tool PRAM Prerecorded Announcement Machine PRAIM Predictive Receiver Autonomous Integrity Monitoring PRELIM Preliminary Data PRESS Pressure Pressure The altitude measured above standard pressure level. Altitude Based on the relationship of pressure and altitude with respect to a standard atmosphere. Preventive A resolution advisory that instructs the pilot to avoid Advisory certain deviations from current vertical rate (TCAS). PRF Pulse Repetition Frequency PRI Primary PRM Precision Runway Monitoring PRN Pseudo Random Noise PROM Programmable ROM Protocol A set of rules for the format and content of messages between communicating processes. PROX Proximity |
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