Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3036

c) VHF marker beacons, or distance measuring equipment (DME) in accordance with section 3.5, together with associated monitor system and remote control and indicator equipment. Note uidance material relative to the use of DME as an alternative to the mar er beacon component of the I S is contained in Attachment C 3.1.2.1.1 Facility Performance Categories I, II and III — ILS shall provide indications at designated remote control points of the operational status of all ILS ground system components. Note It is intended that the air traffic services unit involved in the control of aircraft on the final approach be one of the designated control points receiving without delay information on the operational status of the I S as derived from the monitors Note It is intended that the air traffic system is li ely to call for additional provisions which may be found essential for the attainment of full operational Category III capability e g to provide additional lateral and longitudinal guidance during the landing roll out and taxiing and to ensure enhancement of the integrity and reliability of the system 3.1.2.2 The ILS shall be constructed and adjusted so that, at a specified distance from the threshold, similar instrumental indications in the aircraft represent similar displacements from the course line or ILS glide path as appropriate, irrespective of the particular ground installation in use. 3.1.2.3 The localizer and glide path components specified in 3.1.2.1 a) and b) which form part of a Facility Performance Category I — ILS shall comply at least with the Standards in 3.1.3 and 3.1.5 respectively, excepting those in which application to Facility Performance Category II — ILS is prescribed. 3.1.2.4 The localizer and glide path components specified in 3.1.2.1 a) and b) which form part of a Facility Performance Category II — ILS shall comply with the Standards applicable to these components in a Facility Performance Category I — ILS, as supplemented or amended by the Standards in 3.1.3 and 3.1.5 in which application to Facility Performance Category II — ILS is prescribed. 3.1.2.5 The localizer and glide path components and other ancillary equipment specified in 3.1.2.1.1, which form part of a Facility Performance Category III — ILS, shall otherwise comply with the Standards applicable to these components in Facility Performance Categories I and II — ILS, except as supplemented by the Standards in 3.1.3 and 3.1.5 in which application to Facility Performance Category III — ILS is prescribed. 3.1.2.6 To ensure an adequate level of safety, the ILS shall be so designed and maintained that the probability of operation within the performance requirements specified is of a high value, consistent with the category of operational performance concerned. Note The specifications for Facility Performance Categories II and III I S are intended to achieve the highest degree of system integrity reliability and stability of operation under the most adverse environmental conditions to be encountered uidance material to achieve this objective in Categories II and III operations is given in of Attachment C 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I 23/11/06 3.1.2.7 At those locations where two separate ILS facilities serve opposite ends of a single runway, an interlock shall ensure that only the localizer serving the approach direction in use shall radiate, except where the localizer in operational use is Facility Performance Category I — ILS and no operationally harmful interference results. 3.1.2.7.1 Recommendation At those locations where two separate I S facilities serve opposite ends of a single runway and where a Facility Performance Category I I S is to be used for auto coupled approaches and landings in visual conditions an interloc should ensure that only the locali er serving the approach direction in use radiates providing the other locali er is not re uired for simultaneous operational use Note If both locali ers radiate there is a possibility of interference to the locali er signals in the threshold region Additional guidance material is contained in and of Attachment C 3.1.2.7.2 At locations where ILS facilities serving opposite ends of the same runway or different runways at the same airport use the same paired frequencies, an interlock shall ensure that only one facility shall radiate at a time. When switching from one ILS facility to another, radiation from both shall be suppressed for not less than 20 seconds. Note Additional guidance material on the operation of locali ers on the same fre uency channel is contained in of Attachment C and olume Chapter 3.1.3 VHF localizer and associated monitor Introduction The specifications in this section cover ILS localizers providing either positive guidance information over 360 degrees of azimuth, or providing such guidance only within a specified portion of the front coverage (see 3.1.3.7.4). Where ILS localizers providing positive guidance information in a limited sector are installed, information from some suitably located navigation aid, together with appropriate procedures, will generally be required to ensure that any misleading guidance information outside the sector is not operationally significant. 3.1.3.1 eneral 3.1.3.1.1 The radiation from the localizer antenna system shall produce a composite field pattern which is amplitude modulated by a 90 Hz and a 150 Hz tone. The radiation field pattern shall produce a course sector with one tone predominating on one side of the course and with the other tone predominating on the opposite side. 3.1.3.1.2 When an observer faces the localizer from the approach end of a runway, the depth of modulation of the radio frequency carrier due to the 150 Hz tone shall predominate on the observer s right hand and that due to the 90 Hz tone shall predominate on the observer s left hand. 3.1.3.1.3 All horizontal angles employed in specifying the localizer field patterns shall originate from the centre of the localizer antenna system which provides the signals used in the front course sector. 3.1.3.2 Radio fre uency 3.1.3.2.1 The localizer shall operate in the band 108 MHz to 111.975 MHz. Where a single radio frequency carrier is used, the frequency tolerance shall not exceed plus or minus 0.005 per cent. Where two radio frequency carriers are used, the frequency tolerance shall not exceed 0.002 per cent and the nominal band occupied by the carriers shall be symmetrical about the assigned frequency. With all tolerances applied, the frequency separation between the carriers shall not be less than 5 kHz nor more than 14 kHz. 2007/70/II. szám C a ter Annex 10 — Aeronautical Communications 23/11/06 3.1.3.2.2 The emission from the localizer shall be horizontally polarized. The vertically polarized component of the radiation on the course line shall not exceed that which corresponds to a DDM error of 0.016 when an aircraft is positioned on the course line and is in a roll attitude of 20 degrees from the horizontal. 3.1.3.2.2.1 For Facility Performance Category II localizers, the vertically polarized component of the radiation on the course line shall not exceed that which corresponds to a DDM error of 0.008 when an aircraft is positioned on the course line and is in a roll attitude of 20 degrees from the horizontal. 3.1.3.2.2.2 For Facility Performance Category III localizers, the vertically polarized component of the radiation within a sector bounded by 0.02 DDM either side of the course line shall not exceed that which corresponds to a DDM error of 0.005 when an aircraft is in a roll attitude of 20 degrees from the horizontal. 3.1.3.2.3 For Facility Performance Category III localizers, signals emanating from the transmitter shall contain no components which result in an apparent course line fluctuation of more than 0.005 DDM peak to peak in the frequency band 0.01 Hz to 10 Hz. 3.1.3.3 Coverage 3.1.3.3.1 The localizer shall provide signals sufficient to allow satisfactory operation of a typical aircraft installation within the localizer and glide path coverage sectors. The localizer coverage sector shall extend from the centre of the localizer antenna system to distances of: 46.3 km (25 NM) within plus or minus 10 degrees from the front course line; 31.5 km (17 NM) between 10 degrees and 35 degrees from the front course line; 18.5 km (10 NM) outside of plus or minus 35 degrees if coverage is provided; except that, where topographical features dictate or operational requirements permit, the limits may be reduced to 33.3 km (18 NM) within the plus or minus 10-degree sector and 18.5 km (10 NM) within the remainder of the coverage when alternative navigational facilities provide satisfactory coverage within the intermediate approach area. The localizer signals shall be receivable at the distances specified at and above a height of 600 m (2 000 ft) above the elevation of the threshold, or 300 m (1 000 ft) above the elevation of the highest point within the intermediate and final approach areas, whichever is the higher. Such signals shall be receivable, to the distances specified, up to a surface extending outward from the localizer antenna and inclined at 7 degrees above the horizontal. Note uidance material on locali er coverage is given in of Attachment C 3.1.3.3.2 In all parts of the coverage volume specified in 3.1.3.3.1, other than as specified in 3.1.3.3.2.1, 3.1.3.3.2.2 and 3.1.3.3.2.3, the field strength shall be not less than 40 microvolts per metre (minus 114 dBW/m2). Note This minimum field strength is re uired to permit satisfactory operational usage of I S locali er facilities 3.1.3.3.2.1 For Facility Performance Category I localizers, the minimum field strength on the ILS glide path and within the localizer course sector from a distance of 18.5 km (10 NM) to a height of 60 m (200 ft) above the horizontal plane containing the threshold shall be not less than 90 microvolts per metre (minus 107 dBW/m2). 3.1.3.3.2.2 For Facility Performance Category II localizers, the minimum field strength on the ILS glide path and within the localizer course sector shall be not less than 100 microvolts per metre (minus 106 dBW/m2) at a distance of 18.5 km (10 NM) increasing to not less than 200 microvolts per metre (minus 100 dBW/m2) at a height of 15 m (50 ft) above the horizontal plane containing the threshold. 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I 23/11/06 3 6 3.1.3.3.2.3 For Facility Performance Category III localizers, the minimum field strength on the ILS glide path and within the localizer course sector shall be not less than 100 microvolts per metre (minus 106 dBW/m2) at a distance of 18.5 km (10 NM), increasing to not less than 200 microvolts per metre (minus 100 dBW/m2) at 6 m (20 ft) above the horizontal plane containing the threshold. From this point to a further point 4 m (12 ft) above the runway centre line, and 300 m (1 000 ft) from the threshold in the direction of the localizer, and thereafter at a height of 4 m (12 ft) along the length of the runway in the direction of the localizer, the field strength shall be not less than 100 microvolts per metre (minus 106 BW/m2). Note The field strengths given in and are necessary to provide the signal to noise ratio re uired for improved integrity 3.1.3.3.3 Recommendation Above degrees the signals should be reduced to as low a value as practicable Note The re uirements in and are based on the assumption that the aircraft is heading directly toward the facility Note uidance material on significant airborne receiver parameters is given in and of Attachment C 3.1.3.3.4 When coverage is achieved by a localizer using two radio frequency carriers, one carrier providing a radiation field pattern in the front course sector and the other providing a radiation field pattern outside that sector, the ratio of the two carrier signal strengths in space within the front course sector to the coverage limits specified at 3.1.3.3.1 shall not be less than 10 dB. Note uidance material on locali ers achieving coverage with two radio fre uency carriers is given in the Note to and in of Attachment C 3.1.3.3.5 Recommendation For Facility Performance Category III locali ers the ratio of the two carrier signal strengths in space within the front course sector should not be less than d 3.1.3.4 Course structure 3.1.3.4.1 For Facility Performance Category I localizers, bends in the course line shall not have amplitudes which exceed the following: Amplitude (DDM) one ( probability) Outer limit of coverage to ILS Point “A” 0.031 ILS Point “A” to 0.031 at ILS Point “A” ILS Point “B” decreasing at a linear rate to 0.015 at ILS Point “B” ILS Point “B” to ILS Point “C” 0.015 3.1.3.4.2 For Facility Performance Categories II and III localizers, bends in the course line shall not have amplitudes which exceed the following: 2007/70/II. szám C a ter Annex 10 — Aeronautical Communications 23/11/06 Amplitude (DDM) one ( probability) Outer limit of coverage to ILS Point “A” 0.031 ILS Point “A” to 0.031 at ILS Point “A” ILS Point “B” decreasing at a linear rate to 0.005 at ILS Point “B” ILS Point “B” to the ILS reference datum 0.005 and, for Category III only: ILS reference datum to ILS Point “D” 0.005 ILS Point “D” to 0.005 at ILS Point “D” ILS Point “E” increasing at a linear rate to 0.010 at ILS Point “E” Note The amplitudes referred to in and are the DDMs due to bends as reali ed on the mean course line when correctly adjusted Note uidance material relevant to the locali er course structure is given in and of Attachment C 3.1.3.5 Carrier modulation 3.1.3.5.1 The nominal depth of modulation of the radio frequency carrier due to each of the 90 Hz and 150 Hz tones shall be 20 per cent along the course line. 3.1.3.5.2 The depth of modulation of the radio frequency carrier due to each of the 90 Hz and 150 Hz tones shall be within the limits of 18 and 22 per cent. 3.1.3.5.3 The following tolerances shall be applied to the frequencies of the modulating tones:

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