WARN Product
The final result is a warning product based on a composite of all warnings for all trial winds.
This example used a threshold of 8 for the correlation threshold (pile product value). The
icon here is drawn to make a clear indication of the type of warning.
Alternatively, the warning display can be configured via the output options button to display
the numerical value of the height in Kfeet of the bird flock beside the icon, or to display the
speed in knots of the flock. The height information is only available for track detection based
on PPI input products since there is no height information available from the other input
products that can be used for DWELL (for example, VIL and TOPS).
When this is animated, the birds appear to fly across the screen at their proper velocity.
Some icons may drop in or out if they are small flocks on the edge of detection. Occasional
false alarms show as isolated flashes during animation. The primary tuning parameter to
balance the probability of detection and false alarm rate is the Correlation Threshold (pile
height).
Chapter 5 – Configuring and Scheduling Optional IRIS Products
RESTRICTED 163
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