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Coding Coding
(binary) (decimal)
Meaning
(TCP altitude in feet)
00 0000 0000 0 No TCP altitude information available
00 0000 0001 1 TCP altitude is ZERO
00 0000 0010 2 TCP altitude = 128 feet
00 0000 001 l 3 TCP altitude = 256 feet
*** *** ***
11 1111 1110 1022 TCP altitude = 130 688 feet
11 1111 1111 1023 TCP altitude > 130 752 feet
2.3.9.7.1 40 TCP latitude
This 14-bit (23-36) subfield shall be used to provide the airborne CPR encoded latitude for the 4D TCP or TCP + 1 message.
Encoding of the 4D TCPtTCP + 1 latitude data shall be accomplished as specified in 2.6.3.
2.3.9.7.2 3D TCP latitude
This 17-bit (23-39) subfield shall be used to provide the angular weighted binary encoded latitude for the 3D TCP or TCP + 1
message. The latitude shall be encoded as a 17-bit two's complement signed binary numeral in which the LSB (bit 39) has a weight
of 2-17 times 360 degrees. North latitudes shall have a positive sign, and south latitudes shall have a negative sign.
2.3.9.8 TcP/TCP + 1 LONGITUDE
This 14-bit (37-50) subfield shall be used to provide the airbomc CPR encoded longitude for the 4D TCP or TCP + 1 message.
Encoding of the 4D TCPiTCP +1 Iongilude data shall bc accomplished as specified in 2.6.3.
2811 1102
No. 77
Part 1 Annex 10 - Aeronautical Telecommunications
This 17-bit (40-56) subficld shall be used to provide the angular weighted binary encodcd longitude for thc 3D TCP or TCP + I
message. The field shall be encoded as a 17-bit two's complement signed binary numeral, in which thc LSB (bit 56) has a weight
of ?-I7 times 360 degrees. The prime (Greenwich) meridian shall be defined as zero longitude. I.,ongitudes to the easl of Greenwich
shall be positive, and those lo thc west of Greenwich shall be negative.
2.3.9.9 Tcp/TCP + 1 TME-TO-GO (i'TG)
This 6-bit (51 -56) subfield shall be used lo provide the binary encoded time-to-go to the TCP or TCP + I message. The TCP timcto-
go subfield shall be encoded as follows:
TCP/TCP + I tinze-to-go (TTG)
Coding Coding Meaning
(binary) (decinzal) (TCP/TCP + I time-to-go itz minutes)
0 No TCP time-to-go information available
I TCP time-to-go is ZERO
2 TCP limc-to-go = 0.25 minutes
3 TCP time-to-go = 0.50 minutes
h** ***
11 1110 62 TCP time-to-go = 15.25 minutes
11 1111 63 TCP time-to-go > 15.375 minures
2-3-10 AIRCRAFT OPERATIONAL COORDINATION MESSAGE
The aircraft operational coordination message squit~crs hall be formatted as specified in the definition of register number 6416a nd
in the following paragraphs.
2.3.10.1 TRANSM!SSION RATE
This message shall be broadcast once per 5 seconds for the duration of the operation, except that it shall be broadcast once per
2 seconds for 30 seconds when the message content changes.
2.3.10.2 M ~ s s a cDE~L IVERY
Message delivery shall be accomplished using the event-driven protocol (2.3.7).
2.3.10.3 PAIRED ADDRESS
This 24-bit (9-32) subficld shall be used to provide the ICAO 24-bit address of the aircraft that [he ADS-B transmitting aircraft is
paired with when participating in coordinated operations with another aircraft.
2.3.10.4 RUNWAY THRESHOLD SPEED
This 5-bit subfield (33-37) shall be uscd to provide [he runway threshold spccrl of the aircraft. Encoding of the subficld shall be as
Collows:
Arlrlex 10 - Aeronautical Telecorn~n~~~~icu~ions Volume It1
RUNWAY THRESHOLD SPEED
Coding Coding Meaning
(binal);) (decimal) (R~lnnjayth reshold speed in krzots)
0 0000 0 No runway threshold speed information available
0 0001 1 Runway threshold speed < 100 knots
0 0010 2 Runway threshold speed = 100 knots
00011 3 Runway threshold speed = 105 knots
0 0100 4 Runway threshold speed = 110 knots
*** *** ***
1 1110 3 0 Runway threshold speed = 240 knots
11111 31 Runway threshold speed > 242.5 knots
Nore.- The encoding showrz in the table represents positive magnitude dutu only.
2.3.10.5 ROLL ANGLE SIGN
This I -bit (38) subfield shall be uscd to provide the direction or sign of the roll angle of the aircraft. Encoding of the subfield shall
be as follows:
ROLL ANGLE SIGN BIT
Coding Meuning
0 Roll angle is +, i.e. right wing down
I Roll angle is -, i.e. left wing down
2.3.10.6 ROLL ANGLE
This 5-bit subfield (39-43) shall be used to provide the roll angle of the aircraft. Encoding of he subfizld shall be as follows:
ROLL ANGLE
Coding Coding Meaning
(binary) (decimal) (Roll angle in degrees)
--. .-
0 0000 0 No roll angle inforination available
0 0001 I Roll angle is ZERO
0 0010 2 Roll angle = 1.0 degree
0 001 l 3 Roll angle = 2.0 degrees
1 1110 30 Roll angle = 29.0 degrees
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