weather radars ??

Question

what are the radars they use for weather news station??

Answer 1

There are different types of weather radar and they have different purposes.

Wind-finding radars are used to track balloons to measure the winds at different levels through the atmosphere.

Weatherwatch radars look for areas of rain and show where they are and which way they are moving. They can analyse a storm vertically and horizontally presenting a three dimensional image of the storm.

Doppler radars do much of the work of a weatherwatch radar but they can also track the movement of air using reflections off dust particles. Doppler radars can pick up wind shear at airports and track seabreezes in from the coast.

Weather radars usually operate in the 5cm to 10cm wavelengths. These wavelengths will reflect off raindrops but not the tiny water droplets that make up clouds.

The news media use images from weatherwatch and doppler radars.

Answer 2

Most news stations have their own radars. They are normally the WSR-88D (Weather Surveillance Radar 1988 Doppler). This is what the National Weather Service currently uses but many TV stations use their own radar.
These radars send out a pulse of microwave energy (5cm or 10cm wavelength) and depending on the return energy between pulses (so between about 1000 pulses per second with a pulse duration of about 10 microseconds for those interested), the radar will come up with those pretty displays seen on TV. Since they are Doppler, they can also track phase shifts which derive motion.

Answer 3

If you're talking about the radar they typically use on the news, it's the doppler radar from the National Weather Service. Some news stations decide to get their own radars and provide a glowy, glitzy, but poorly-used gimmick for the public.

Answer 4

I think Craig R has done an excellent job of answering. And I agree. On board radar systems have the advantage of immediate look ahead conditions but Nexrad being ground based can see "layers" at different altitiudes and paint a much broader picture. Also, most XM packages give you a lot more than just radar with satellite views, freezing levels, winds, METARS, etc. If money and weight are not a problems, I would opt for both. If they are conditions, I would go for the NEXRAD system. At least you can get a picture of what you are looking at far enough in advance to avoid problems most of the time.

Answer 5

uh, Doppler Radars??????

Answer 6

use color code or use . weather~~www.intillast.com