User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
Table 1-32: BDS 0,9 Airborne Velocity Subtypes 1 & 2 – Velocity Over Ground
Bits
Parameter
Parameter Data
External Source(s)
1-5
Format Type
Code
19
6-8
Sub Type
1 (Ground Speed
Normal)
Label 166 N/S velocity and Label 174
E/W velocity from GPS.
9
Intent Change
Flag
10
IFR Capability
Flag
11-13
NACv
0, 1, 2, 3, 4.
Label 247 HFOM from GPS.
Label 136 VFOM from GPS.
14
Direction E/W
E
W
15-24
E/W Velocity
N/A
Knots
Label 174 E/W Velocity from GPS 1 or 2
(best HIL value) or calculated from Label
112 Ground Speed from GPS, or Label
367 E/W velocity from FMS or IRS.
25
Direction N/S
N
S
26-35
N/S Velocity
N/S
Knots
Label 166 N/S Velocity from GPS 1 or 2
(best HIL value) or calculated from Label
112 Ground Speed from GPS, or Label
366 N/S velocity from FMS or IRS.
36
Source of
Vertical Rate
N/A
BARO
GEO
37
Signe for
Vertical Rate
+
-
38-46
Vertical Rate
N/A
Feet per minute
Label 165 Vertical Rate from GPS 1 or 2
(best HIL value) or Label 212 Vertical
Rate from ADC.
Applicable to –XX400 and subsequent:
IRS Label 365 Inertial Vertical Velocity is
the primary source to encode the Vertical
Rate field. Label 212 Vertical Rate is an
alternate data source.
47-48
Reserved
49
Difference Sign
+
-
Pub. No. 8600200-001, Revision 004
34-45-29
1-126
04 Nov 2014
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