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Time Stamp
It is essential that the plot has an associated time stamp, otherwise the accuracy of the positional declaration will have no value in subsequent plot correlation and tracking systems. Furthermore plot data is no longer real time information and is subject to un-quantified delays in subsequent data processing.
Time information is normally added by the hit processor or plot extractor. Modern radar data formats make full provision for the time to be incorporated in the plot message. Normally an accurate time source is provided at a radar station and this provides a master source for both primary and secondary radar systems. Typically, the time reference can be an atomic clock or a GPS based time reference.
