Vaisala IRIS, User Manual

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Figure 31 TRACK with Two Centroids
The input product can be any horizontal Cartesian product, such as a PPI product. The
TRACK product applies the same logic as the warning product to locate the centroids within
the input product. You define the threshold level and size of the centroids, below which
weather features are ignored. When new data comes in, the
TRACK product compares the
previous TRACK product to the new data to obtain a motion vector. This information is used
to define the new TRACK product, including the forecast point. Warnings are issued if a
centroid hits, or is forecast to pass through, a protected area.
As new data comes in, the
TRACK product must determine whether a new track point is an
extension of a previous track, the start of a new track (when a centroid is born), or the end
of a track (when a centroid dies). Track parameters, such as the maximum velocity and
tolerance for new points, influence this determination.
TRACK is an overlay product created in the Quick Look Window .
1. To create a new TRACK product, select Type > TRACK .
2. To load an existing TRACK product, select File > Open .
Chapter 3 – Configuring IRIS Products
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