Vaisala IRIS, User Manual

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Algorithm Description
NSSL2005 This algorithm uses a rain intensity -based classifier,
and different equation for each intensity.
For more information on NSSL2005 QPE, see:
Ryzhkov, A. V., et. al. Rainfall Estimation with a
Polarimetric Prototype of WSR-88D. J. Appl Meteor.,
44, 502-515 .
XY Smoother
The XY Smoother can significantly improve the appearance of products for presentation
and improve data compression. The smoother performs image processing to average the
color contours and interpolate over small gaps or missing pixels in the final Cartesian image.
Specify the length of the smoother in km.
Smoothing requires substantial CPU resources. The internal limit on the
smoother length is 60 pixels, much longer than you probably want to use.
CAUTION!
To produce many smoothed products in a regular operation, Vaisala suggests the following:
• Use low resolution products together with smoothing.
It is faster to make a low resolution product and smooth it than to make a medium
resolution product and smooth it.
In many cases, the results are nearly identical, so there is no benefit in smoothing high
or medium resolution products.
• Use the minimum smoothing length to get the desired effect. Do not over-smooth and
do not use a length that is larger than you need.
Larger smoothing lengths require more computation.
3.2.4 Display Parameters
The display parameters determine how the product appears.
Display Units
Most data types are numerical. Display Units shows the range of values and the units for the
product's output values.
Chapter 3 – Configuring IRIS Products
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