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Depends on the radar. Often C-Band is used (4-8GHz). This frequency is good since rain is quite reflective for it, and it doesn't attenuate as much as the higher X or K band frequencies.
precipitation map
A continuous record of rainfall is measured by a rain gauge. Although it is impossible to measure all the rainfall in a specific area, a rain gauge can give meteorologists a good idea of how much rain has fallen in an area.
a lot, well it depends on the area but a lot
A Doppler radar is used for "seeing" precipitation and how heavy it is. It can also see the direction the precipitation is moving and the winds inside the rain clouds or thunderstorms and can pick out the rotation which can lead to a tornado.
"The radar was filled with green showing all of the rain that was coming."
to much rain
rain forest
I would assume so. Radar is just another form of electromagnetic radiation, just like light. I would infer that if you can see through the rain (that's light), then other forms of electromagnetic radiation (such as radar) can also pass through the rain. Of Course, I would also assume that the range and effectiveness of the radar gun would be reduced at least a small bit. As long as the radar is functional normal rain water will not have any effect on it working to detect speed.
An example of an indirect weather observation system is a weather radar. Radar uses radio waves to detect precipitation, such as rain, snow, or hail, in the atmosphere. By measuring the intensity and movement of these precipitation particles, meteorologists can infer information about the weather conditions in a specific area.
5 inches
Andre A. Doneaud has written: 'Rain volume estimation over areas using satellite and radar data' -- subject(s): Rain and rainfall, Radar meteorology, Measurement
Desperate Landscapes - 2007 Rain Rakes and Radar 5-1 was released on: USA: 9 July 2009
Hardly any
A weather radar is a type of radar used to locate precipitation, calculate its motion, estimate its type (rain, snow, hail, etc.), and forecast its future position and intensity.
Richard G. Semonin has written: 'Radar analysis of Project warm rain, Hilo, Hawaii, summer, 1965' -- subject(s): Rain and rainfall, Radar meteorology
For an area to be considered a rainforest, it must receive over 80 inches of rain.