Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3646

c) flying a circle at 30-degree bank. The first of these methods is designed to measure the polarization errors which occur when an aircraft rolls while flying a given VOR radial. The second method measures the polarization error for eight different aircraft headings when the aircraft is not banked. The third method measures the polarization errors, for all aircraft headings, with the aircraft banked at 30 degrees. The flight tests are as follows: 3.3.3 30-degree wing rock. The aircraft is flown on a constant heading towards the VOR station and is banked slowly from plus 30 degrees to minus 30 degrees. The course deviation indicator current is recorded and converted into degrees of course displacement. 3.3.4 Eight tracks over a ground checkpoint. The aircraft is flown over a specific ground checkpoint on eight different headings displaced by 45 degrees. The course deviation indicator current is recorded and the recording is marked when the aircraft is over the checkpoint. The indicated bearing on each heading is compared with the indicated bearing when the aircraft is heading towards the VOR station and is over the checkpoint. 3.3.5 Circular flight with 30-degree bank. The aircraft is first headed towards the VOR station over a ground checkpoint. From this point, it is flown in a circle at constant 30-degree bank. The course deviation indicator current is recorded while the aircraft is flying this circle and converted into degrees of error from the bearing indicated at the beginning of the procedure when the aircraft is over the checkpoint. The change of bearing of the aircraft with respect to the VOR station must be subtracted from the course deviation error. The resultant, after receiver error has been eliminated, is assumed to be polarization error. 3.3.6 The polarization tests may conveniently be conducted at an altitude of 300 m (1 000 ft). Flight tests in 3.3.4 and 3.3.5 may be employed with respect to a checkpoint which is approximately 33.4 km (18 NM) from the VOR. ATT C-45 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I 3.4 Criteria for geographical separation of VOR type facilities 3.4.1 In using the figures listed in Table C-3, it must be noted that these are derived from the agreed formulae in respect of specific altitudes. In application of the figures, regional meetings would only afford protection to the extent of the operationally required altitude and distance and, by use of the formulae, criteria can be calculated for any distance or altitude. 3.4.2 The figures listed are calculated on the assumption that the effective adjacent channel rejection of the airborne receiver is better than 60 dB down at the next assignable channel. 3.4.3 The calculations are based on the assumption that the protection against interference afforded to the wanted signal from the unwanted signal is 20 dB, corresponding to a bearing error of less than 1 degree due to the unwanted signal. 3.4.4 It is recognized that, in the case of adjacent channel operation, there is a small region in the vicinity of a VOR facility, in which interference may be caused to an aircraft using another VOR facility. However, the width of this region is so small that the duration of the interference would be negligible and, in any case, it is probable that the aircraft would change its usage from one facility to the other. Table C-3. Values of geographical separation distances for co-channel operation VOR facilities of equal effective radiated power VOR facilities which differ in effective radiated power by 6 dB VOR facilities which differ in effective radiated power by 12 dB Minimum geographical separation between facilities Minimum geographical separation between facilities Minimum geographical separation between facilities is 2D1 + 20 S if D1 > D2 or 2D2 + 20 S if D2 > D1 is 2D1 + 20 K S  if D1 > D2 + K S or 2D2 + 20 K S  if D1 < D2 + K S is 2D1 + 20 K S  if D1 > D2 + K S or 2D2 + 20 K S  if D1 < D2 + K S Altitude m (ft) S dB/km (NM) K dB S km (NM) K dB K S km (NM) K S  km (NM) K S  km (NM) K dB K S km (NM) K S  km (NM) K S  km (NM) 1 200 (4 000) 0.32 (0.60) 61 (33) 19 (10) 43 (23) 80 (43) 37 (20) 24 (13) 98 (53) 3 000 (10 000) 0.23 (0.43) 87 (47) 26 (14) 61 (33) 113 (61) 52 (28) 35 (19) 137 (74) 4 500 (15 000) 0.18 (0.34) 109 (59) 33 (18) 76 (41) 143 (77) 67 (36) 44 (24) 174 (94) 6 000 (20 000) 0.15 (0.29) 128 (69) 39 (21) 89 (48) 167 (90) 78 (42) 52 (28) 206 (110) 7 500 (25 000) 0.13 (0.25) 148 (80) 44 (24) 104 (56) 193 (104) 89 (48) 59 (32) 237 (128) 9 000 (30 000) 0.12 (0.23) 161 (87) 48 (26) 113 (61) 209 (113) 96 (52) 65 (35) 258 (139) 12 000 (40 000) 0.10 (0.19) 195 (105) 59 (32) 135 (73) 254 (137) 119 (64) 78 (42) 311 (168) 18 000 (60 000) 0.09 (0.17) 219 (118) 65 (35) 154 (83) 284 (153) 130 (70) 87 (47) 348 (188) Note.— S, and the sign of are defined in 3.4.5. 23/11/06 ATT C-46 2007/70/II. szám Attac ment C Annex 10 — Aeronautical Communications 3.4.5 The agreed formulae for calculating the geographical separations are as follows (nautical miles may be substituted for kilometres): A — minimum geographical separation (co-channel) either km S   where S !  or km S   where S  B — geographical separation (ad acent channel) collocation case S  non-collocated case k S  !  m where S !  or k S   m where S  C — geographical separation (ad acent channel) (receivers designed for 100 k z channel spacing in a 50 k z channel spacing environment) If receivers having an effective adjacent channel rejection of no better than 26 dB are used (e.g. a 100 kHz receiver used in a 50 kHz environment), a figure of 6 should be substituted for the figure of 40 in the above adjacent channel formulae. In this instance, the geographical collocation formula should not be used as the protection afforded may be marginal. This leads to the following formula: k S  !  m ATT C-47 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I where S !  or k S   m where S  fo : e distances required of the two facilities (km). of the facility providing D1 coverage exceeds that of .6 T f orne receivers can perate correctly. der to protect VOR receivers designed for 50kHz channel spacing, minimum separations are chosen in rder to provide the following minimum signal ratios within the service volume: ired signal by up to 34 dB; o 50 dB. rder to provide the following minimum signal ratios within the service volume: ired signal by up to 7 dB; ; o 50 dB. .7 cognition of the basic assumptions made in this substitution of an approximate method of calculating separation, and the p In the above rmulae 1, = servic = the ratio (dB) by which the effective radiated power the facility providing D coverage. Note.— If the facility providing is of higher effective radiated power, then will have a negative value. S = slope of the curve showing field strength against distance for constant altitude (dB/km). 3.4 he igures listed in Table C-3 are based on providing an environment within which the airb o 3.4.6.1 In or o

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