Vaisala IRIS - WARN Algorithm

7. In Combining Algorithm, select the algorithm that is used in regions where the radars
are overlapped.
The options are Maximum, Average, Priority, Nearest, or Weighted (per the site list).
Maximum is recommended for filling blanked or blocked regions.
More information
‣
Configuring Map Projections (page 19)
‣
Composite Algorithm (page 130)
5.2.4
WARN Algorithm
The WARN product uses a composite algorithm.
Remapping
WARN products are not stored in Cartesian format, so there is no remapping required. The
output projection specified in the COMP configuration determines the default display
location and range when the composited WARN product is displayed.
Overlapping
The key to combining WARN products is determining which of the input centroids are really
the same feature, and which are dierent. We do this with the adjustable Centroid Distance
specified in the Product Configuration Menu.
For WARN products, this field replaces the Output Smoother field used for other products.
The composite is started by copying the highest priority input. Then all the other inputs are
looped through in priority order. Each new centroid is compared with all the centroids in the
composite being assembled. If the center of a new centroid is within the centroid distance of
the ellipse of a composite centroid, then they are treated as overlapped in the combination
algorithm below.
Combining
The choices for combining algorithms in the Product Configuration Menu (see Configuring
COMP (page 132)) are dierent for WARN:
IRIS Product and Display User Guide M211319EN-H
136 RESTRICTED