时间：2011-08-28 11:47来源：蓝天飞行翻译 作者：航空 点击：次
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Airport surveillance radar approach. An instrument approach in which ATC issues instructions for pilot compliance based on aircraft position in relation to the . nal approach course and the distance from the end of the runway as displayed on the controller’s radar scope. Air route surveillance radar (ARSR). Air route traf. c control center (ARTCC) radar used primarily to detect and display an aircraft’s position while en route between terminal areas. Air route traffic control center (ARTCC). Provides ATC service to aircraft operating on IFR flight plans within controlled airspace and principally during the en route phase of . ight. Airspeed indicator. A differential pressure gauge that measures the dynamic pressure of the air through which the aircraft is flying. Displays the craft’s airspeed, typically in knots, to the pilot. Air traffic control radar beacon system (ATCRBS). Sometimes called secondary surveillance radar (SSR), which utilizes a transponder in the aircraft. The ground equipment is an interrogating unit, in which the beacon antenna is mounted so it rotates with the surveillance antenna. The interrogating unit transmits a coded pulse sequence that actuates the aircraft transponder. The transponder answers the coded sequence by transmitting a preselected coded sequence back to the ground equipment, providing a strong return signal and positive aircraft identification, as well as other special data. Airway. An airway is based on a centerline that extends from one navigation aid or intersection to another navigation aid (or through several navigation aids or intersections); used to establish a known route for en route procedures between terminal areas. Alert area. An area in which there is a high volume of pilot training or an unusual type of aeronautical activity. Almanac data. Information the global positioning system (GPS) receiver can obtain from one satellite which describes the approximate orbital positioning of all satellites in the constellation. This information is necessary for the GPS receiver to know what satellites to look for in the sky at a given time. ALS. See approach lighting system. Alternate airport. An airport designated in an IFR . ight plan, providing a suitable destination if a landing at the intended airport becomes inadvisable. Alternate static source valve. A valve in the instrument static air system that supplies reference air pressure to the altimeter, airspeed indicator, and vertical speed indicator if the normal static pickup should become clogged or iced over. Altimeter setting. Station pressure (the barometric pressure at the location the reading is taken) which has been corrected for the height of the station above sea level. AME. See aviation medical examiner. Amendment status. The circulation date and revision number of an instrument approach procedure, printed above the procedure identi. cation. Ammeter. An instrument installed in series with an electrical load used to measure the amount of current . owing through the load. |
