發信人: MDA ([[ 猛  禽 ]])    看板: Aero
日期: Sat Oct 27 17:42:05 2001
標題: Re: 助導航系統有誰能回答問題

>==> weky (小懶蟲) 的文章中提到:
>1.      何謂「調變（Modulation）」、「載波（Carrier）」、
         與「信號（Signal）」？（可以一助導航設備為例說明三者關係。）
>3.      請說明儀器降落系統（ILS-Instrument Landing System）的組成及功能。

1. Non-Directional Radio Beacon(NDB)
   A low or medium frequency radio beacon transmits non-directional SIGNALS
   whereby the pilot of an aircraft properly equipped can determine bearings 
   and "home" on the station. These facilities normally operate in the 
   frequency band of 190 to 535 kHz and transmit a continuous CARRIER with 
   either 400 or 1020 Hz MODULATION.

2. ILS: 依功能性可分成三部份
   a. Guidance information: Localizer, Glide Slope.
   b. Range information: Marker Beacon, DME.
   c. Visual information: Approach lights, touchdown and center lights, runway
                          lights.
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* Origin: 中山大學-美麗之島BBS * From: 61.216.126.12 [已通過認證]
.