...
Recursive Average Gain*: The gain used when implementing a rolling average of the amplitude values of real cells seen during the SSI process. The gain controls how much of a new cell's amplitude is added to the rolling average.
Clutter Slow Decay: The Clutter Slow Decay effects how clutter is removed from the clutter map. It works by adding to the Time Constant (please refer to Tracker) being used in the clutter map. We use a default Time Constant of 90% in the standard tracking clutter map, so the slow decay is a % increase of the remaining 10% from the Time Constant. For example: a 50% Slow Decay is equal to 50% of the 10% that is not used by the clutter channel (so it would be 5%). This is then added to the Time Constant when clutter is being removed, causing the removal of clutter to be slower (essentially being removed at a Time Constant of 95% compared to the previous 90%). This allows us to hold onto the clutter data for longer. An example of this useful feature can be seen in ClearWay™ during situations where queues are in progress. When the queue drops, we often get false tracks where targets, such as trees, become visible to the radar again. By holding the clutter data for longer, there is more time before the clutter value will drop below the threshold, causing an alarm when the clutter jumps back up, once the queue has cleared.
Global
Use STC: Select this to enable Sensitivity Time Control to reduce clutter from nearby static objects. STC helps to reduce clutter by selectively attenuating the radar signal power, within a specified range, to allow for nearby interfering factors, such as buildings, gantries, lakes etc.
...