Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3861

d) The azimuth antenna field monitor should be sited to avoid affecting, or being affected by, the localizer monitor. 4.1.2.3 Azimuth antenna sited behind ILS localizer 4.1.2.3.1 The distance between the localizer and the MLS azimuth antenna will depend on obstacle limitation requirements, availability of real estate, presence of a localizer back course, and the desirability of collocating the DME/P antenna with the azimuth antenna. If a localizer back course is being utilized, a distance of at least 30 m (100 ft) between the azimuth and localizer antennas is preferred, and the azimuth antenna must be symmetrically sited on the localizer course centre line. For localizer antennas with a high front-to-back power ratio, it may be possible to reduce the 30 m (100 ft) separation. Once the distance between the azimuth and localizer antennas is known, Figure G-22 can be used to determine the height of the azimuth antenna phase centre relative to the localizer antenna array. To ensure that the azimuth guidance errors due to signal scattering by the ILS localizer remain insignificant (0.03 degree) throughout the azimuth coverage volume, point “W” (Figure G-22) is typically selected to determine the value for variable “X” of Figure G-22. If selection of that point results in an azimuth antenna siting which violates obstacle clearance requirements or a tower-mounted installation that is not feasible, the following actions may be considered:

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