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σpr_gnd 8 0 to 5.08 m 0.02 m 0.98 m 0011 0001
B1 8 ±6.35 m 0.05 m +0.10 m 0000 0010
B2 8 ±6.35 m 0.05 m +0.15 m 0000 0011
B3 8 ±6.35 m 0.05 m –0.25 m 1111 1011
B4 8 ±6.35 m 0.05 m Not used 1000 0000
Measurement Block 2
Ranging source ID 8 1 to 255 1 4 0000 0100
Issue of data (IOD) 8 0 to 255 1 126 0111 1110
Pseudo-range correction (PRC) 16 ±327.67 m 0.01 m –1.0 m 1111 1111 1001 1100
Range rate correction (RRC) 16 ±32.767 m 0.001 m/s +0.2 m/s 0000 0000 1100 1000
σpr_gnd 8 0 to 5.08 m 0.02 m 0.34 m 0001 0001
B1 8 ±6.35 m 0.05 m +0.20 m 0000 0100
B2 8 ±6.35 m 0.05 m +0.30 m 0000 0110
B3 8 ±6.35 m 0.05 m –0.50 m 1111 0110
B4 8 ±6.35 m 0.05 m Not used 1000 0000
Annex 10 — Aeronautical Communications Volume I
DATA CONTENT DESCRIPTION
BITS
USED
RANGE OF
VALUES RESOLUTION VALUES
BINARY REPRESENTATION
(NOTE 1)
Measurement Block 3
Ranging source ID 8 1 to 255 1 12 0000 1100
Issue of data (IOD) 8 0 to 255 1 222 1101 1110
Pseudo-range correction (PRC) 16 ±327.67 m 0.01 m +1.11 m 0000 0000 0110 1111
Range rate correction (RRC) 16 ±32.767 m 0.001 m/s –0.2 m/s 1111 1111 0011 1000
σpr_gnd 8 0 to 5.08 m 0.02 m 1.02 m 0011 0011
B1 8 ±6.35 m 0.05 m +0.10 m 0000 0010
B2 8 ±6.35 m 0.05 m +0.25 m 0000 0101
B3 8 ±6.35 m 0.05 m –0.25 m 1111 1011
B4 8 ±6.35 m 0.05 m Not used 1000 0000
Measurement Block 4
Ranging source ID 8 1 to 255 1 23 0001 0111
Issue of data (IOD) 8 0 to 255 1 80 0101 0000
Pseudo-range correction (PRC) 16 ±327.67 m 0.01 m –2.41 m 1111 1111 0000 1111
Range rate correction (RRC) 16 ±32.767 m 0.001 m/s –0.96 m/s 1111 1100 0100 0000
σpr_gnd 8 0 to 5.08 m 0.02 m 0.16 m 0000 1000
B1 8 ±6.35 m 0.05 m +0.20 m 0000 0100
B2 8 ±6.35 m 0.05 m +0.30 m 0000 0110
B3 8 ±6.35 m 0.05 m –0.50 m 1111 0110
B4 8 ±6.35 m 0.05 m Not used 1000 0000
Message Block CRC 32 — — — 1100 0010 1111 0011 0000 1011 1100 1010
APPLICATION FEC 48 — — — 0110 0011 1110 1001 1110 0000 1110 1101 0010 1001 0111 0101
Input to the bit scrambling
(Note 2)
0 46 10 10 55 30 CA 10 80 BC 17 C2 20 28 00 00 FF 40 FF 26 00 1C FF 8C 40 C0 DF 01 20 7E 39 FF 13 00 88 20 60 6F 01 30 7B
F6 00 1C FF CC 40 A0 DF 01 E8 0A F0 FF 02 3F 10 20 60 6F 01 53 D0 CF 43 AE 94 B7 07 97 C6
Output from the bit scrambling
(Note 3)
0 60 27 98 1F 2F D2 3B 5F 26 C2 1B 12 F4 46 D0 09 81 B6 25 1C 18 D0 7C 2A 7F B9 55 A8 B0 27 17 3A 60 EB 5F 1B 3B A5
FE 0A E1 43 D7 FA D7 B3 7A 65 D8 4E D7 79 D2 E1 AD 95 E6 6D 67 12 B3 EA 4F 1A 51 B6 1C 81 F2 31
Fill bits 0 to 2 — — 0
Power ramp-down 9 — — — 000 000 000
D8PSK Symbols
(Note 4)
00000035 11204546 31650100 12707716 71645524 74035772 26234621 45311123 22460075 52232477 16617052 04750422
07724363 40733535 05120746 45741125 22545252 73171513 51047466 13171745 10622642 17157064 67345046 36541025
07135576 55745512 222
Notes.—
1. The rightmost bit is the LSB of the binary parameter value and is the first bit transmitted or sent to the bit scrambler. All data fields are sent in the order specified in
the table.
2. This field is coded in hexadecimal with the first bit to be sent to the bit scrambler as its MSB. The first character represents a single bit.
3. In this example fill bits are not scrambled.
4. This field represents the phase, in units of π/4 (e.g. a value of 5 represents a phase of 5 π/4 radians), relative to the phase of the first symbol.
23/11/06 ATT D-32
Attachment D Annex 10 — Aeronautical Communications
Table D-7A. Example of a Type 101 VDB message
DATA CONTENT DESCRIPTION
BITS
USED
RANGE OF
VALUES RESOLUTION VALUES
BINARY REPRESENTATION
(NOTE 1)
BURST DATA CONTENT
Power ramp-up and settling 15 000 0000 0000 0000
Synchronization and ambiguity
resolution
48
0100 0111 1101 1111 1000 1100 0111 0110 0000 0111 1001 0000
SCRAMBLED DATA
Station slot identifier (SSID) 3 E 100
Transmission length (bits) 17 0 to 1824 bits 1 bit 416 00000000110100000
Training sequence FEC 5 11011
APPLICATION DATA MESSAGE BLOCK
Message Block (Type 101 message)
Message Block Header
Message block identifier 8 Normal 1010 1010
GBAS ID 24 ERWN 00010101 00100101 11001110
Message type identifier 8 1 to 8,101 1 101 0110 0101
Message length 8 10 to 222 bytes 1 byte 46 0010 1110
Message (Type 101 example)
Modified Z-count 14 0 to 1199.9 s 0.1 s 100 s 00 0011 1110 1000
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