Today's Doppler systems-- the government owns about 115-- are as far ahead of first-generation radar systems as today's computers are ahead of old, clunky mainframes.
12.
The Doppler system combines information from the current low-level wind-shear sensors and the new radar technology to paint a broader and better picture of wind hazards, Wiggins said.
13.
The radial velocity of the reflector is determined directly in Doppler systems by measuring the frequency of the reflector over the short span of time associated with detection.
14.
The Houston Doppler system operates from a 100-foot radar tower, topped with a white, golf ball-like dome, about 12 miles from Houston Intercontinental and adjacent to Hooks Airport.
15.
Stretching from Alaska to Baffin Island and covering over, the DEW Line consisted of 63 stations with AN / FPS-19 high-power, pulsed, L-Band radars, most augmented by AN / FPS-23 pulse-Doppler systems.
16.
A contract was awarded to Raytheon Corp . in 1988 to build 47 Doppler systems, but Houston's is the first in the $ 364 million program to be used by air traffic controllers.
17.
The terminology " Doppler ultrasound " or " Doppler sonography ", has been accepted to apply to both pulsed and continuous Doppler systems despite the different mechanisms by which the velocity is measured.
18.
"I think there's going to be a movement towards more routine testing _ not invasive testing, but using this Doppler system in earlier stages, before they even get symptoms, to perhaps pick this up,"
19.
These sophisticated radars already can spot a small flock of birds or a swarm of insects, says Donald Burgess, an expert on Doppler systems for the National Severe Storms Prediction Center in Norman, Okla . And they can spot tornadoes inside of clouds.
20.
The new radar is so high-tech that controllers don't need to interpret it; a computer does that automatically, said Jim Sanzone, a senior FAA engineer from Oklahoma City who was on hand this week in Houston for final tests of the Doppler system.
