The polarization radars can also measure information about both the horizontal and vertical dimensions of precipitation sized particles. The Weather Guys. Skip to content. Home About Listen Live! Search for:. How do weather radars work? Posted on September 23, by Weather Guys Editor. Category: Meteorology Comments Off on How do weather radars work?
Atmospheric scientists use different types of ground-based and aircraft-mounted radar to study weather and climate. Radar can be used to help study severe weather events such tornadoes and hurricanes, or long-term climate processes in the atmosphere.
Continuously modified and improved, this state-of-the-art radar system now includes dual-wavelength capability. When the Ka-band is added, a 0. Airborne Research Radar In the air, research aircraft can be outfitted with an array of radars.
It was designed and manufactured by a collaborative team of mechanical, electrical, aerospace, and software engineers; research scientists; and instrument makers from EOL. Skip to main content. Earth Observing Laboratory. Search form Search. These two images show how dual-polarization helps the NWS forecaster detect a tornado producing damage.
The left image shows how the Doppler radar can detect rotation. Between the two yellow arrows, the red color indicates outbound wind while the green colors indicated inbound wind relative to the location of the radar. Prior to dual-polarization, this is all we knew that there is a rotation near the earth's surface. Unless there were storm spotters visibly watching the storm, we would not know for certain that a tornado was present.
The right image shows how dual-polarization information helps detect debris picked up by the tornado so we have confidence of a tornado as these two areas coincide. All modern radars are digitized Doppler radars. Therefore the old-time radar sweeping line associated with analog radars is no longer applicable. However, some local television stations continue to fool you by showing a sweeping radar on their broadcast.
The sweeping arm is "fake news" literally. The radar image itself may be valid but the sweeping arm is added by a computer program after the image was created. Even if it appears an image updates once the line passes any particular storm, that sweeping line is computer generated and not real. All modern radars are Doppler radars.
Therefore the old-time radar sweeping line is no longer applicable. The sweeping arm is fake. The radar image itself may be valid but the sweeping arm is added by the computer. Please Contact Us. Toggle navigation JetStream.
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