时间:2011-08-27 23:38来源:蓝天飞行翻译 作者:航空 点击:次
Tip: to find a specific term, use the Acrobat search : click Contract/Complete Work Breakdown Structure Complete Work Breakdown Structure (CWBS) for a contract. It includes the EUROCONTROL approved work package WBS for reporting purposes and its discretionary extension to the lower levels by the contractor. It includes all the elements for the products (hardware, software, data, or services) which are the responsibility of the contractor. (Source: MIL-STD-881B). Control Antenna An SSR antenna has a polar diagram which is designed to cover the side lobes of the main interrogating antenna. It is used to radiate a control pulse which, if it exceeds in amplitude the associated interrogation signal at the input to the transponder, will cause the transponder to inhibit responses to the interrogation pulses. Modem SSR antenna have the control elements built into the main array. The control antenna is also known as the SLS (Side Lobe Suppression) antenna. Control Area A controlled airspace extending upwards from a specified limit above the earth. Control Pattern This is the polar diagram of the Control Antenna discussed above. Modern integrated SSR antennae have a modified cardioids beam shape. Control Pulse A pulse (P2 for Modes A and C, P5 for Mode S), transmitted in accordance with ICAO Annex 10 recommendations, by the ground equipment (SSR Interrogator) in order to ensure side lobe suppression at transponder level. Control Status Record sent by a radar station at every Azimuth Sector Crossing. It contains information on the status of the radar station and on the azimuthal sector. Control Zone Is a controlled airspace extending upwards from the surface of the earth to a specified upper limit Controlled Aerodrome An aerodrome at which an air traffic control service is provided to aerodrome traffic. (Ref. ICAO Doc 9569 Definitions). Controlled Airspace Is an airspace of defined dimensions within which air traffic control services are provided to IFR flights and to VFR flights in accordance with the airspace classification. Tip: to find a specific term, use the Acrobat search : click |