classified as the return of reflectivity values greater
than or equal to 18.0 dBZ. A return to the "Clear Air
Mode" must be manually selected at the UCP.
The antenna of the WSR-88D is part of what
major system component?
Which hydrometeor would provide higher dBZ
values, hail or drizzle?
The RDA is capable of reducing or eliminating
what type(s) of radar problems?
Which component of the WSR-88D contains
algorithms that create products?
What is the difference between "base" products
and "derived" products?
Which component of the WSR-88D does the
observer or forecaster use to request and obtain
What is the primary input device when operating
a PUP workstation?
Most Navy and Marine Corps stations with
Principal User Processor (PUP) workstations
are classified as being what type of WSR-88D
WSR-88D narrowband links are maintained by
what mode of communication?
Data available at the PUP workstation is
recorded at which archive level?
What is meant by the term "volumetric
Which operational mode and volume coverage
pattern should be selected when severe weather
is present or expected?
LEARNING OBJECTIVES: Identify how
WSR-88D products are acquired. Recognize
the difference between base data and derived
data. Identify the more commonly used base
and derived products. Identify the uses and
limitations of base and derived products.
In this section, we will explain how products are
acquired from the WSR-88D. Next, we discuss in
detail the difference between base and derived data.
We then examine some of the most commonly used
products. Our operational overview of these products
will include a simple description, along with a
discussion of the purpose, strengths, and limitations of
Products from the WSR-88D can be grouped into
three general areas of application: precipitation
measurement, storm warning, and wind profiling.
These products become available to users in one of
three ways. They are either specifically identified on a
routine product set (RPS) list, solicited as a "one-time
request" (OTR), or are automatically generated as an
"alert" condition (alert-paired product).
Routine Product Set (RPS)
An RPS list provides an automated way of
managing RPG workload. It allows associated users to
identify and access routinely required products. Each
PUP site tailors its own list according to mission
requirements and modifies this list as needs change
(via the UCP applications terminal). Each RPS list
contains up to 20 products catalogued by name and
distinguishing characteristics (i.e., elevation angle,
range/resolution, etc.). Products found on the RPS list
are generated every volume scan and then distributed
to the appropriate user.
One-time Request (OTR)
Products that are not routinely needed are not
usually placed on the RPS list. When such products are
needed, associated users may obtain them via a one-
time request. All one-time requests made by associated
users will be honored by the RPG. Products not on the
RPS list will be built on demand. With NAPUPs,
however, this is not the case. Since non-associatedusers
cannot increase the RPGs workload, new or unusual
products are NOT built on demand for them. OTRs
made by NAPUPs are only honored for pre-existing
products stored in the RPG database.