Final answer:
Moving Target Indicator (MTI) technology eliminates second-time-around targets in Primary Surveillance Radar (PSR) by filtering out stationary objects and only displaying moving targets.
Step-by-step explanation:
Second-time-around targets in Primary Surveillance Radar (PSR) can be eliminated using a technology called Moving Target Indicator (MTI).
MTI filters out stationary objects and only displays moving targets, such as aircraft.
This can be achieved by comparing multiple radar returns and suppressing the signals from stationary objects.
It can also use Doppler shift information to identify moving targets.
For example, in pulse-Doppler radar systems used in modern military radars, a MTI filter is used to eliminate clutter from stationary objects and detect fast-moving targets.
The MTI filter can effectively distinguish between stationary and moving targets based on the Doppler shift in the frequency of the radar return signal.
Overall, MTI technology is an important tool to eliminate second-time-around targets in PSR and improve the accuracy and reliability of radar systems.