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Set-up Location Description
IRIS/Analysis Central
oce
Receives raw data products from the radar site over the network or from an
archive device, such as a tape or optical disk.
Supports the full product set as well as remote control and monitoring.
IRIS/Display Remote
workstation
Receives processed product files or raw data over the network or from an
archive, and uses them for display purposes.
Supports the basic product set as well as remote control and monitoring.
2.6. IRIS Hardware
2.6.1. Workstation
IRIS runs on computers with a Linux operating system.
The workstation can run the IRIS processes and menus and functions as an output device for
IRIS products.
2.6.2. Radar Signal Processor
Radar signal processor (RVP) software triggers radar measurement by producing the trigger
signal for the transmitter using the intermediate frequency digital receiver (IFDR) unit in the
receiver.
After the IFDR unit has digitized the received echo signal into samples (I and Q data), RVP
processes the data in the radar server computer using computations such as:
Converting the received signal amplitude into calibrated radar reflectivity values.
Doppler processing to
filter out ground clutter and compute radial velocities.
Polarimetric processing to classify the measured hydrometers and to apply attenuation
correction.
The end product of the RVP process is a radar ray, where selected radar data from a certain
short time interval is stored as a function of range.
Parameters configure signal processing, such as pulse repetition frequency, range resolution,
and Doppler
filter parameters. You can select these either directly when running RVP as a
standalone or through the IRIS software when IRIS controls the RVP process during
automatic weather radar measurements.
2.6.3. Radar Control Processor
Radar control processor (RCP) software controls and monitors weather radar system sub-
units, including the pedestal, power supply unit, transmitter, receiver, waveguide matrix,
cabinet cooler, dehydrator, and safety interlock system.
The hardware interfaces for the subsystems are the CAN bus, ethernet, I/O connector panel,
serial, and, USB interfaces.
Chapter 2 – IRIS Introduction
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