Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 1633

b) amendments to SARPs for instrument landing system (ILS), distance measuring equipment (DME) and microwave landing system (MLS). 24 February 2006 17 July 2006 23 November 2006 Aeronautical Communications Panel (ACP) Identification of the universal access transceiver (UAT) operating frequency. 26 February 2007 16 July 2007 22 November 2007 * Did not affect any Standards or Recommended Practices. ___________________ 22/11/07 No. 82 Chapter 3 Annex 10 — Aeronautical Communications 3-109 23/11/06 DME parameters Interrogation Reply Pulse codes Channel pairing DME/P mode DME channel number VHF frequency MHz MLS angle frequency MHz MLS channel number Frequency MHz DME/N µs Initial approach µs Final approach µs Frequency MHz Pulse codes µs 120X 117.30 – – 1 144 – – 1 207 120Y 117.35 – – 1 144 – – 1 081 121X 117.40 – – 1 145 – – 1 208 121Y 117.45 – – 1 145 – – 1 082 122X 117.50 – – 1 146 – – 1 209 122Y 117.55 – – 1 146 – – 1 083 123X 117.60 – – 1 147 – – 1 210 123Y 117.65 – – 1 147 – – 1 084 124X 117.70 – – 1 148 – – 1 211 **124Y 117.75 – – 1 148 – – 1 085 125X 117.80 – – 1 149 – – 1 212 **125Y 117.85 – – 1 149 – – 1 086 126X 117.90 – – 1 150 – – 1 213 **126Y 117.95 – – 1 150 – – 1 087 ** These channels are reserved exclusively for national allotments. ** These channels may be used for national allotment on a secondary basis. The primary reason for reserving these channels is to provide protection for the secondary surveillance radar (SSR) system. ∇ 108.0 MHz is not scheduled for assignment to ILS service. The associated DME operating channel No. 17X may be assigned for emergency use. The reply frequency of channel No. 17X (i.e. 978 MHz) is also utilized for the operation of the universal access transceiver (UAT). Standards and Recommended Practices for UAT are found in Annex 10, Volume III, Part I, Chapter 12. 22/11/07 No. 82 Annex 10 — Aeronautical Communications Volume I 23/11/06 3-110 Table B. Allowable DME/P errors Location Standard Mode PFE CMN 37 km (20 NM) to 9.3 km (5NM) from MLS approach reference datum 1 and 2 1A ±250 m (±820 ft) reducing linearly to ±85 m (±279 ft) ±68 m (±223 ft) reducing linearly to ±34 m (±111 ft) 9.3 km (5 NM) to MLS approach reference datum FA ±85 m (±279 ft) reducing linearly to ±30 m (±100 ft) ±18 m (±60 ft) FA ±85 m (±279 ft) reducing linearly to ±12 m (±40 ft) ±12 m (±40 ft) see Note IA ±100 m (±328 ft) ±68 m (±223 ft) At MLS approach reference datum and through runway coverage FA ±30 m (±100 ft) ±18 m (±60 ft) FA ±12 m (±40 ft) ±12 m (±40 ft) Throughout back azimuth coverage volume 1 and 2 FA ±100 m (±328 ft) ±68 m (±223 ft) see Note IA ±100 m (±328 ft) ±68 m (±223 ft) Note.— At distances from 9.3 km (5 NM) to the MLS approach reference datum and throughout the back azimuth coverage, the IA mode may be used when the FA mode is not operative. ___________________ Attachment C Annex 10 — Aeronautical Communications ATT C-73 23/11/06 7.1.13 Considerations for the universal access transceiver (UAT) 7.1.13.1 Frequency planning criteria to ensure compatibility between DME and the UAT are contained in Part II of the Manual on the Universal Access Transceiver (UAT) (Doc 9861)*. 7.2 Guidance material concerning DME/N only 7.2.1 Effective radiated power (ERP) of DME/N facilities 7.2.1.1 The power density figure prescribed in 3.5.4.1.5.1 of Chapter 3 is on the following assumptions: Airborne receiver sensitivity –112 dBW Airborne transmission line loss +3 dB Airborne polar pattern loss relative to an isotopic antenna +4 dB Necessary power at antenna –105 dBW Minus 105 dBW at the antenna corresponds to minus 83 dBW/m2 at the mid-band frequency. Note.— The power density for the case of an isotropic antenna may be computed in the following manner: 10 log 4 d a P P λ = − π where Pd = power density in dBW/m2; Pa = power at receiving point in dBW; λ = wavelength in metres. 7.2.1.2 Nominal values of the necessary ERP to achieve a power density of minus 83 dBW/m2 are given in Figure C-20. For coverage under difficult terrain and siting conditions it may be necessary to make appropriate increases in the ERP. Conversely, under favourable siting conditions, the stated power density may be achieved with a lower ERP. 7.2.1.3 The use of Figure C-20 is illustrated by the following examples. In order to achieve the necessary nominal power density at slant range/levels of 342 km (185 NM)/12 000 m (40 000 ft), 263 km (142 NM)/12 000 m (40 000 ft) and 135 km (73 NM)/6 000 m (20 000 ft), ERPs of the order of plus 42 dBW, plus 36 dBW and plus 30 dBW respectively would be required. 7.3 Guidance material concerning DME/P only 7.3.1 DME/P system description 7.3.1.1 The DME/P is an integral element of the microwave landing system described in Chapter 3, 3.11. The DME/P signal format defines two operating modes, initial approach (IA) and final approach (FA). The IA mode is compatible and interoperable with DME/N and is designed to provide improved accuracies for the initial stages of approach and landing. * In preparation. 22/11/07 No. 82 Annex 10 — Aeronautical Communications Volume I 23/11/06 ATT C-74 Figure C-20

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