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Opportunities, Antennas and Notch Filters

机译:机会,天线和陷波滤波器

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In the past, I've mentioned that many non-directional beacons (NDB) across Europe and North America will close by 2015. These are mainly beacons used for en route navigation. However, I expect that lower powered locator NDBs at airports will remain operational for some years to come. Many NDBs have already closed across Europe and North America as part of this rationalisation and I recently learnt that Australia is now following suit. In a recent statement similar to those previously issued in Europe and North America, retention of the existing ground based system would require Airservices Australia to invest in replacement and upgraded equipment, in order to meet Australia's requirement for navigation of instrument flight rules aircraft. Approximately 200 installations, mainly NDBs and VHF omnidirectional radio ranges (VOR), are mostly at end-of-life, do not have spare parts support by manufacturers and are difficult and expensive to maintain.
机译:过去,我曾提到欧洲和北美的许多非定向信标(NDB)将于2015年关闭。这些信标主要是用于航路导航的信标。但是,我预计机场的低功率定位器NDB将在未来几年内继续运行。作为这种合理化的一部分,欧洲和北美的许多新开发银行已经关闭,我最近了解到澳大利亚现在正在效仿。在类似于以前在欧洲和北美发布的声明中,保留现有的地面系统将要求澳大利亚航空服务公司投资购买更换和升级的设备,以满足澳大利亚对仪表飞行规则飞机导航的要求。大约有200项安装,主要是NDB和VHF全向无线电范围(VOR),大多处于寿命终止,没有制造商提供的备件支持,维护起来困难且昂贵。

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  • 来源
    《Radiouser》 |2013年第4期|50-51|共2页
  • 作者

    Robert Connolly;

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