Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3419

2. A facility without a back azimuth database may employ all words up to B39 for the approach azimuth database. able A 1 Auxiliary data ords 1 t roug 3 (see ) Word Data content Type of data Maximum time (seconds) Bits used Range of values Bit numbers Approac a imut map/CRC ord B1 PREAMBLE digital 2.5 I1 to I12 Address I13 to I20 Number of approach azimuth procedure descriptors 0 to 15 I21 to I24 Last approach azimuth database word see Note 2 I25 to I30 Approach azimuth CRC code see Note 3 I31 to I62 Word B42 transmitted see Note 4 I63 Word A4 transmitted see Note 4 I64 Word B43 transmitted see Note 4 I65 Spare see Note 12 I66 to I69 PARITY see Note 13 I70 to I76 23/11/06 A A 1 2007/70/II. szám A endix A Annex 10 — Aeronautical Communications Word Data content Type of data Maximum time (seconds) Bits used Range of values Bit numbers rocedure descriptor ords B2 to B(M 1) (approach azimuth database) (see Note 1) B(b) to B(b N 1) (back azimuth database) PREAMBLE digital 2.5 I1 to I12 Address I13 to I20 Basic indicator see Note 5 I21 to I45 Validity indicator 1 to 9 (see Note 14) I46 to I49 Route indicator see Note 5 I50 to I54 Runway number 0 to 36 (see Note 15) I55 to I60 Runway letter see Note 6 I61 to I62 Procedure type see Note 7 I63 First waypoint index 0 to 63 (see Notes 8, 9) I64 to I69 PARITY see Note 13 I70 to I76 Waypoint data ords (see Table A-16) B(M 2) to B(a) (approach azimuth database) (see Notes 1 and 11) B(b N) to B(38) (back azimuth database) PREAMBLE digital 2.5 I1 to I12 Address I13 to I20 Waypoint definition data items see Notes 10, 11 I21 to I69 PARITY see Note 13 I70 to I76 ack a imut map/CRC ord (see Notes 1 and 11) B39 PREAMBLE digital 2.5 I1 to I12 Address I13 to I20 Number of back azimuth procedure descriptors 0 to 15 I21 to I24 First back azimuth database word see Note 2 I25 to I30 Back azimuth CRC code see Note 3 I31 to I62 Word B43 transmitted see Note 4 I63 Spare see Note 12 I64 to I68 Back azimuth map/CRC indicator see Note 11 I69 PARITY see Note 13 I70 to I76 A A 1 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I N TES 1. Variables used in word numbers correspond to those used in Table A-14. 2. This field is coded in accordance with Table A-9, using bits I13 through I18. In this table, bit I25 carries the information of bit I13 from Table A-9 and is transmitted first. 3. The CRC code contains the remainder, R(x), of the modulo 2 division of two polynomials: ( ) ( ) ( ) ( ) ( ) mod 2 x M x R x x x x ª º  « » « » ¬ ¼ M(x) is the information field, which consists of the approach azimuth or back azimuth database defined below, excluding the preambles, addresses, parity bits, and CRC code bits. For auxiliary data words these are bits I21 to I69, and for basic data words bits I13 to I30. The database consists of the following data words in the order listed: Approach a imuth database ac a imuth database B1 (bits I21 to I30, I63 to I69) B(b) to B38 B2 to B(a) B39 (bits I21 to I30, I63 to I69) B40, B41 B40, B41, A3 A1 or B42, A2, A3 A4 or B43 (if transmitted) A4 or B43 (if transmitted) Basic data word 6 Basic data word 6 M(x) is multiplied by x32, which appends 32 zero bits to the end of the dividend. G(x) is the generator polynomial, defined as follows: G(x) x32 x31 x14 x13 x9 x8 x4 x3 x 1 Q(x) is the quotient of the division. The CRC code, R(x), is transmitted with the coefficient of x31 as bit I31 and the coefficient of x0 as bit I62. 4. The convention for coding is as follows: no yes 5. Alpha characters are coded as defined in 3.11.4.8.3 for data words B1 through B39. 6. The convention for coding is as follows: 0 no letter 1 R (right) 2 C (centre) L (left) 7. The convention for coding is as follows: 0 approach procedure 1 departure procedure 8. Waypoint index numbers are assigned by sequentially numbering all waypoints in the approach azimuth or back azimuth database. If a waypoint at the primary runway threshold is coded using only a threshold crossing height, it is omitted from the waypoint index sequence. 9. A value of zero in this field indicates that the procedure is a computed centre line procedure based on data contained in auxiliary data words A1 (or B42), A2, A3 and A4 (or B43). 10. Waypoint definitions are of variable length and are coded sequentially without conforming to word boundaries. Spare bits are not permitted between waypoint definitions. Any spare bits at the end of the last waypoint data word are set to zero. Waypoint definitions for an approach procedure are coded in the order that the aircraft flies the procedure. Waypoint definitions for a missed approach or departure are coded in the reverse order. Missed approach or departure waypoints which are not shared with approach waypoints are coded after the last approach waypoint in the database. 11. A facility without a back azimuth data base may employ auxiliary word B39 as a waypoint data word for the approach azimuth database. Bit I69 of word B39 is used to indicate the application of this word. The convention for coding is as follows: 0 word B39 is a waypoint data word 1 word B39 is the back azimuth map/CRC word 12. All spare bits are set to ERO. 13. Parity bits I70 to I76 are chosen to satisfy the equations given in Note 1 of Table A-12. 14. The coded value 0000 is not allowed. 15. Runway number designation 0 is for heliport operations. 23/11/06 A A 20 2007/70/II. szám A endix A Annex 10 — Aeronautical Communications A A 21 23/11/06 able A 16 Waypoint definition data items (see ) Data content Bits used Range of values Least significant bit X coordinate 41 940 m (see Notes 1, 2) 2.56 m Y coordinate follows See Note 3 Y coordinate 41 940 m (see Notes 1, 2) 2.56 m coordinate follows See Note 3 coordinate 100 to 8 091 m (see Notes 1, 4) 1 m Next segment/field identifier See Note 5 Threshold waypoint height 0 to 31.5 m (see Note 5) 0.5 m Virtual azimuth to waypoint distance 0 to 6 300 m (see Note 5) 100 m Next waypoint index See Notes 5, 6 Missed approach index See Notes 5, 6 N TES 1. The origin of the coordinate system is the MLS datum point. The X-axis is horizontal, and lies in the vertical plane containing the runway centre line, with a positive number representing a location toward the approach reference datum. The Y-axis is horizontal and perpendicular to the X-axis, with a positive number representing a location to the left of centre line as viewed from the MLS datum point looking toward the approach reference datum. The -axis is vertical, with a positive number representing a location above the MLS datum point. Earth curvature is not considered when determining waypoint coordinate values. 2. The convention for coding is as follows: Most significant bit is the sign bit: 0 positive 1 negative The other bits represent the absolute value. 3. The convention for coding is as follows: 0 no 1 yes The “Y coordinate follows” bit is set to ERO (no) to indicate that the Y coordinate for the waypoint is zero. In this case, the Y coordinate field is not used. The “ coordinate follows” bit is set to ERO (no) to indicate either that the waypoint is two-dimensional or that it lies on a constant gradient between two waypoints for which the coordinate is transmitted. In either of these two cases, the coordinate field is not used. 4. This field is coded as an unsigned value with an offset of 100 m. A value of zero in this field would therefore represent a coordinate of 100 m. 5. Data fields which follow the next segment/field identifier are transmitted only for certain cases. The coding of the next segment/field identifier and use of subsequent data fields are defined in Table A-17. 6. Waypoint index numbers are assigned by sequentially numbering all waypoints in the approach azimuth or back azimuth database. If a waypoint at the primary runway threshold is coded using only a threshold crossing height, it is omitted from the waypoint index sequence. The next waypoint index field always refers to an index number lower than that of the current waypoint. The missed approach index field always refers to an index number higher than that of the current waypoint. 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I able A 1 ext segment/field identifiers (see ) Application Data field(s) to follow identifier Next waypoint location Next waypoint shared (Note 1) Linked to missed approach Segment type Next segment/ field identifier Approach procedure Missed approach procedure Departure procedure Straight No Curved Next waypoint X coordinate Straight Any Yes No Curved

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