AS 680/682
Record and Replay Description, Operation and Maintenance
ADS−B
4−74 Ed. 10.07
Fig. 4−102 RAC, page ’Trackstore’ (example)
The following parameters are only applicable, if the ’check for mandatory ASTERIX CAT 21 items’ in
the notebook page ’CPR Decoding’, refer to section 4.6.5.4, is enabled (see Fig. 4−102):
S Absolute maximal age of the track position in seconds: The position of a target is set to invalid,
if the time passed since the last position update is greater than the value given in this text field.
S Maximal velocity age (in seconds) relative to the time of the last position: If the last update of the
speed is older than the last position update minus the velocity age or more recent than the last
position update plus the velocity age, then the speed data for the respective target are declared
invalid.
S Maximal target status age (in seconds) relative to the time of the last position: If the last update
of target status is older than the last position update minus target status age or more recent than
the last position update plus the target status age, then the target status for the respective target
is declared invalid.
S Maximal operational status age (in seconds) relative to the time of the last position: If the last
update of the operational status is older than the last position update minus maximal operational
status age or more recent than the last position update plus the maximal operational status age,
then the operational status for the respective target is declared invalid.
S Maximal identification age (in seconds) relative to the time of the last position: If the last update
of the identification is older than the last position update minus identification age or more recent
than the last position update plus the identification age, then the identification for the respective
target is declared invalid.
S Absolute maximal Mode 3/A age in seconds: The mode 3/A address of a target is set to invalid,
if the time passed since the last position update is greater than the value given in this text field.
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