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┣━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━┫
┃ADS TRACK (HIGH quality) normal extrapolation ┃／＼ ┃
┣━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━┫
┃ADS TRACK (HIGH quality) update extrapalation ┃▲ ┃
┣━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━┫
┃ADS TRACK (LOW qualrty) normalextrapalation ┃ ◇ ┃
┣━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━┫
┃ADS TRACK (LOW quality) update extrapolatian ┃ ◆ ┃
┣━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━┫
┃LASTADS TRACK ┃巫 ┃
┗━━━━━━━━━━━━━━━━━━━━━━━┻━━━━━┛
Figure 19 : ADS Track Symbols
The quality (high or low) of the ADS track symbol is based on the FOM (Figure Of Merit) and on the age
of the ADS report.
The -update- extrapolation is used to represent the position of the aircraft as reported each time a basic
ADS update or one shot ADS is received. The position is the position received from the aircraft,
adjusted for only the transmission time of the data from aircraR till display time.
The "normal extrapolation symbolis displayed for ADS track positions generated by the system based
upon waypaint and intent data from the aircraft.
5.2.1.1.3 Flight Plan Tracks Symbol
┏━━━━━━━━━┳━━━━━┓
┃ TRACK TYPE ┃ SYMBOL ┃
┣━━━━━━━━━╋━━━━━┫
┃FLIGHT PLAN TRACK ┃ I l ┃
┗━━━━━━━━━┻━━━━━┛
Figure 20 : Fllght Plan Track Symbol
5.2.1.2 Track History Dots
The maximum number of past positions able to be displayed for a track is 9, each position denoted by a
dot. Track History Dots can be selected or deselected, and the controller can also choose the number
of track history dots by a pop-up menu, selectable from the Generallnformation Window.
The result of radar track cancel on the history dots is described in the EUROCAT SSS.
雷达标牌位置符号是表示当前雷达目标位置的特定符号，该位置符号包括一组用于表示不同的雷达
目标航迹类型的符号．雷达标牌位置符号的种类见表1。
表1雷达标牌位置符号
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┃PPs序号 ┃ PPs类型 ┃ PPs含义 ┃
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空中交通管制雷达标牌(4)
