behind this type of antennas reduces to small figures avia.

[leo1980twa]

The sensitive area behind this type of antennas reduces to small figures which are met easily due to practical reasons anyhow. помогите пожалуйста понять смысл.

контекст

The new integrated SN 400 dual frequency Localizer antennas
• wide aperture 21/7 and
• medium aperture 13/7
do have very similar course radiation pattern compared to the existing S4000 antennas (2F 20/5, 2F 12/3). Hence, the critical and sensitive areas are defined to be the same for the corresponding antennas. Due to the integrated concept, the front to back ratio is generally ≥26dB for all SN400 dual frequency antennas. The sensitive area behind this type of antennas reduces to small figures which are met easily due to practical reasons anyhow. The single frequency antenna 1F12 is identical for S4000 and SN400 and, hence, the critical and sensitive areas are identical also.

[PPlus]

The definitions for ILS critical and sensitive areas are found in paragraph 2.1.9.1 in Attachment C to Annex 10:
2.1.9.1 ………..
a) the ILS critical area is an area of defined dimensions about the localizer and glide path antennas where vehicles, including aircraft, are excluded during all ILS operations. The critical area is protected because the presence of vehicles and/or aircraft inside its boundaries will cause unacceptable disturbance to the ILS signal-in-space;
b) the ILS sensitive area is an area extending beyond the critical area where the parking and/or movement of vehicles, including aircraft, is controlled to prevent the possibility of unacceptable interference to the ILS signal during ILS operations. The sensitive area is protected against interference caused by large moving objects outside the critical area but still normally within the airfield boundary.

Задний лепесток диаграммы направленности антенны локатора уменьшен соответственно уменьшена область чувствительности

[PPlus]

http://www.sortlandtrading.no/upload/Sec%2005%20Critical%20and%20Sensitive%20Area%20Cat%20I-III_UILS261_2-0.pdf
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