Television stations compete in storm tracking and many of them have their own Doppler radars.
Britain's radars, meanwhile, "are being upgraded to have a Doppler capability, " Mr. Page says.
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There is a doppler shift when the recipient is moving and this can be a significant issue.
Doppler weather radar was part of a wider modernization of forecast offices nationwide lasting nearly a decade.
Seasoned storm trackers provide critical field data that can't be gleaned from high-powered Doppler radar, veteran meteorologists say.
Two major field programs have studied these storms using dozens of mobile weather stations, aircraft and Doppler radars.
We now average over 1000 per year, a number that has been constant since the Doppler network went national.
When he entered the market, his engineers designed software to synch with Doppler radars staged near TV broadcast stations.
The car can park itself, it will automatically detect and avoid other vehicles thanks to radar and doppler sensors.
The spectrum of the light reflected from the planet is Doppler-shifted because the planet, like the ambulance, is moving.
Some of them were on instrumented vehicles that included mobile Doppler Radar that also contributed to the excellent warnings issued for that tornado.
This exploits the Doppler effect familiar when a siren changes pitch as the fire engine on which it is mounted speeds past you.
Conveniently, more modern spacecraft than the Pioneers include separate range-finding hardware, which can be used to test the accuracy of the Doppler method.
Anthony Pallot said the Doppler radar, near the German lookout tower at La Moye, could detect the intensity, location and how rain was moving.
Even though most of the chasers must have recognized Mr. Wurman's "Doppler on Wheels, " no one would get out of the way, he said.
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So perhaps the predicted trajectories are correct after all, but the flaw lies in the Doppler-ranging method used to measure the probes' actual trajectories.
After the deployment of Doppler weather radar, lead times for tornadoes were nearly doubled, from less than five minutes to around 10 to 13 minutes.
Further number crunching showed that the period of the planet, based on the Doppler-shifted signal, is 3.3 days which is known to be the correct value.
In 1967 he delivered a "transcutaneous Doppler, " a forerunner of sonography.
The fires (some awesome video here) created a plume of smoke that stretched for 30 miles, just skirting downtown Houston and visible on doppler radar.
This is due to a Doppler shift the same phenomenon that causes the pitch of an ambulance's siren to seem to vary as it passes a stationary listener.
Doppler radar allowed forecasters to see more than just precipitation.
Other sites show up-to-the-nanosecond forecasts and Doppler radar satellite images.
Knowing that the atmosphere could produce a strong tornado, they immediately issued the tornado warning as soon as the Doppler radar started to show low-level rotation within the storm.
In the early 1990s, Doppler Weather Radar, or as it was more commonly known, Next Generation Weather Radar, was deployed at local National Weather Service forecast offices nationwide.
In the late 1980s we deployed the new Doppler radar, the WSD-88, which can actually track the movement of air within a storm (and therefore pinpoint a tornado vortex).
This is a reddening of a galaxy's spectrum caused by the Doppler effect (the effect that causes a police-car siren to drop in pitch as the car drives away).
While tools such as Doppler Radar detect winds within severe storms that could indicate a tornado may be imminent, many of these rotating storms do not go on to produce tornadoes.
Just as you could use the Doppler Effect to pinpoint the location of a satellite flying overhead, you could also employ satellite signals to find your own location on the ground.
And since a moving object causes a tiny change (known as a Doppler shift) in the frequency of the reflected signal, Silent Sentry can also calculate how fast it is moving.
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