Minimum Aviation System Performance Standards for Aircraft ...

For systems not integrated with TCAS, or for TCAS tracks without advisories, tracks
shall (R3.xxx) be ordered by range within a priority level, or by an alternative criteria
suited to the specific application.
3.4.1.3 Input Interface Requirements
ASSAP provides the central processing for ASA and interfaces with many other avionics
subsystems. Depending on the class of aircraft, either EvAcq or AIRB defines the basic
use of ASA for enhanced traffic situational awareness, and support for this application is
the minimum requirement for all ASA implementations. The remaining applications
(VSA, ITP, and SURF) are optional. Although VSA, ITP, and SURF applications are
optional, when they are implemented, the requirements designated for these applications
must be met.
ASSAP shall (R3.xxx) provide all input interfaces to support the minimum requirements
for all installed applications as indicated in Table 3.4.1.3 by a dot (•).
ASSAP shall (R3.xxx) provide input interfaces for validation status information (e.g.,
valid bit) for each required information element input to the ASSAP from the ADS-B /
ADS-R / TIS-B receiver. [need to make sure if valid bits are available for each]
Table 3.4.1.3: ASSAP Input Interface Requirements
Source Info Category Information Element 6
ADS-B / ADS-R / TIS-B Receiver
ADS-B / ADS-R /
TIS-B Receiver
(continued)
Aircraft State Data
ID / Status
Time Of Applicability • • • • •
Latitude (WGS-84) • • • • •
Longitude (WGS-84) • • • • •
Geometric Altitude 1 • • • • •
Air / Ground State • • • • •
North Velocity While Airborne • • • • •
East Velocity While Airborne • • • • •
Ground Speed While on the Surface • • • •
Heading (true / mag) or Ground Track While on the Surface • • • • •
Pressure Altitude • • • • •
Vertical Rate • • • • •
Navigation Integrity Category (NIC) • • • • •
ADS-B Link Version Number • • • • •
Participant Address • • • • •
Address Qualifier • • • • •
Call Sign / Flight ID • • • •
A/V Length and Width Codes 8 •
Emitter Category • • • •
Emergency / Priority Status 7 • • • • •
EvAcq
AIRB
VSA
ITP
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SURF