Minimum Aviation System Performance Standards for Aircraft ...

Table 3.5.1.3: State Vector Report Definition
SV
Elem.
#
Contents
Required from surface participants
Required from airborne
participants
[Resolution or # of bits]
Reference
Section
Notes
ID
1
2
Participant Address
Address Qualifier
[24 bits]
[1 bit]
•
•
•
•
3.3.2.2.1
3.3.2.2.2 1
TOA 3 Time Of Applicability [0.2 s] • • 3.5.1.3.3
Geometric
Position
4a
4b
4c
5a
Latitude (WGS-84)
Longitude (WGS-84)
Horizontal Position Valid
Geometric Altitude
[1 bit]
•
•
•
•
•
•
•
3.5.1.3.4
3.5.1.3.5
3.5.1.3.6
2, 3
3, 4
5b Geometric Altitude Valid [1 bit] • 3.5.1.3.7
Horizontal
Velocity
6a
6b
6c
7a
North Velocity while airborne
East Velocity while airborne
Airborne Horizontal Velocity Valid
Ground Speed while on the surface
[1 bit]
[1 knot]
•
•
•
•
3.5.1.3.8
3.5.1.3.9
3.5.1.3.10
3
3
7b Surface Ground Speed Valid [1 bit] • 3.5.1.3.11
Heading
8a
8b
Heading while on the Surface
Heading Valid
[6° or better (6 bits)]
[1 bit]
•
•
3.5.1.3.12
3.5.1.3.13
Baro Altitude
9a
9b
Pressure Altitude
Pressure Altitude Valid [1 bit]
•
•
3.5.1.3.14
3.5.1.3.15
3, 4
Vertical Rate 10a Vertical Rate (Baro/Geo) • 3.5.1.3.16 3
10b Vertical Rate Valid [1 bit] • 3.5.1.3.17
NIC 11 Navigation Integrity Category [4 bits] • • 3.5.1.3.18
Report Mode 12 SV Report Mode [2 bits] 3.5.1.3.19
Notes for Table 3.5.1.3:
1. The minimum number of bits required by this MASPS for the Address Qualifier field is just one
bit. However, when ADS-B is implemented on a particular data link, more than one bit may be
required for the address qualifier if that data link supports other services in addition to the ADS-
B service. The number of bits allocated for the Address Qualifier field may be different on
different ADS-B data links.
2. A horizontal position resolution finer than 20 m will be required if the NACP element of the MS
report (§3.5.1.4) is 9 or greater (§3.3.11).
3. Resolution requirements of these elements must be sufficient to meet the error requirements
specified in Table 3.4.3.3.1.1a.
4. Future revisions of this MASPS may not require that both geometric and pressure altitudes – if
available – to be broadcast at the SV rate. Conditions will need to be specified as to when each
altitude must be the “primary” altitude being sent at the SV rate.
3.5.1.3.1 Air/Ground State
A transmitting ADS-B participant’s air/ground state is an internal state in the transmitting
ADS-B subsystem that affects which SV report elements are to be broadcast, but which is
not required to be broadcast in ADS-B messages from that participant.
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