Minimum Aviation System Performance Standards for Aircraft ...

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5. Required if TCAS is present in the configuration and an integrated TCAS/ASA traffic
display is used. These outputs are expected to be supplied by current TCAS
installation.
6. Each future application will add columns for minimum requirement.
7. When used to display the Emergency/Priority Status.
8. When used to display the physical extent of the aircraft.
3.4.1.4 ASSAP Functional Requirements
ASSAP functional requirements are broken into surveillance processing requirements
(§3.4.1.4.1) and applications processing requirements (§3.4.1.4.2).
3.4.1.4.1 ASSAP Surveillance Processing Requirements
ASSAP surveillance processing function receives information for traffic A/V’s from
various surveillance sources, correlates the data, registers the data, and outputs a track file
consisting of state and other information about each A/V under track. Requirements for
the surveillance sub-function follow. Note that the tracking and correlation functions
make extensive use of the data that is provided in state data (Table 3.4.1.3).
ASSAP shall (R3.xxx) acquire all state data necessary to generate tracks for A/Vs and
own-ship.
ASSAP may receive A/V data from different surveillance sources.
ASSAP shall (R3.xxx) perform a tracking function on each traffic A/V.
ASSAP shall (R3.xxx) extrapolate the target horizontal position (i.e., latitude and
longitude), for tracks for which a position update has not been received, to a common
time reference prior to providing information to the CDTI.
Note: A linear extrapolation is expected to be used to compensate for any delays
incurred leading up to the time of transmission. Extrapolation is only performed
on targets determined to be airborne. The pressure altitude should not be
extrapolated since the altitude rate accuracy may induce larger altitude errors
than the provided in the original data.
ASSAP shall (R3.xxx) not introduce any additional position error to that which might
otherwise be introduced by a linear extrapolation using the instantaneous velocity
reported for the target by other surveillance sources.
ASSAP shall (R3.xxx) maintain tracks for multiple A/Vs.
ASSAP may receive A/V data for the same A/V from different surveillance sources.
The ASSAP tracking function shall (R3.xxx) include a correlation function that
associates traffic data from any surveillance sources that relate to the same A/V’s track to
minimize the probability of processing and displaying duplicate A/Vs.