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PARAMAX COMPLETES WIND PROFILER DEMONSTRATION NETWORK

 PARAMAX COMPLETES WIND PROFILER DEMONSTRATION NETWORK
 MCLEAN, Va., May 20 /PRNewswire/ -- Paramax Systems Corporation


announced today that it has completed delivery of the 29-station network of Wind Profilers throughout the central United States. Wind Profiler was dedicated formally today by the National Oceanic and Atmospheric Administration (NOAA) at ceremonies in Washington.
 In addition to the demonstration network systems in the central United States, Wind Profilers are also installed in Homer, Ala.; Maynard, Mass.; and Bloomfield, Conn.
 The Wind Profiler is a highly sensitive, unattended UHF clear-air Doppler radar that profiles the upper winds' speed and direction. The system is one of the most sensitive production radars ever developed, with the demonstrated capability to obtain wind information from clear air simply by measuring changes in the refractive index of the air.
 The Wind Profiler can accurately measure the speed and direction of the wind up to a height of 10 miles (16.25 km) using radar pulses. Such information about wind patterns and jet streams is vital to forecasting weather patterns and movements. Currently, wind profiles are measured by the National Weather Service only twice a day using balloon-launched radiosondes. Wind Profilers, by contrast, generate a wind profile every six minutes and compute average conditions every hour. The speed and direction of the wind can be measured in steps of 250 meters up to 9.25 kilometers altitude, and in 1,000 meter steps between 7.25 and 16.25 kilometers.
 NOAA awarded Paramax a contract in 1986 to develop and manufacture Wind Profilers for the demonstration network in the central part of the U.S. The network is designed to demonstrate the value of Wind Profilers in significantly improving mesoscale (intermediate or middle range) weather forecasts. This network could pave the way for construction of a nationwide grid of Wind Profilers in the mid- to late-1990s.
 The Wind Profiler consists of an equipment shelter and an unusual-looking radar antenna array. The antenna is a coaxial- collinear phased array, laid out in a square pattern measuring 40 feet on each side. The equipment shelter houses all the active components of the system: the solid-state transmitter, receiver, signal processor, computer and data transmission equipment. It also includes a digital environmental control system to regulate the temperature and humidity in the shelter. Data from each Wind Profiler is transmitted to NOAA in Boulder, Colo., and to the National Weather Service via satellite.
 The radar transmits a sequence of three radar beams: one straight up, one tilted 15 degrees north and one tilted 15 degrees east. Each beam probes the air for two minutes. The long dwell time in each beam position enables the radar to detect very weak signals and small velocity profile differences in adjacent sampling cells.
 The accuracy of the system is within 1 meter per second for horizontal wind speed and within 3 degrees of wind direction. The Wind Profiler can withstand temperatures from -40 degrees Celsius to 50 degrees Celsius, hurricane force winds, rainfall as heavy as three inches per hour, four feet of snow, or three inches of ice.
 "Creating a radar this sensitive has been a significant technical challenge," said Frederick F. Jenny, president of Paramax Systems Corporation. "This program has involved a partnership with NOAA, our customer, to achieve a system that will significantly impact medium and short range weather forecasting in this country. Other benefits of the network include aviation forecasts of upper winds for better fuel efficiency, critical information on global climactic changes, and better predictions of threatened areas in the event of atmospheric emergencies involving the release of hazardous materials."
 Paramax Systems Corporation, headquartered in McLean, is a $2 billion information systems company with 16,000 employees. A subsidiary of Unisys Corporation (NYSE: UIS), Blue Bell, Pa., Paramax is an experienced leader in providing advanced integrated systems, electronic products and related professional services for civil and defense agencies in the United States, Canada and nations worldwide.
 Unisys Corporation is a leading information systems company with 60,000 customers in more than 100 countries. The company is a leading manufacturer of commercial information systems, defense systems and related services.
 -0- 5/20/92
 /CONTACT: Laura N. Overstreet of Paramax Systems Corporation, 703-847-3375/
 (UIS) CO: Paramax Systems Corporation; Unisys Corporation; National
 Oceanic and Atmospheric Administration ST: Virginia IN: ARO SU:


DS -- DC004 -- 2233 05/20/92 10:02 EDT
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Date:May 20, 1992
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