Here we see an example of a doppler radar. Doppler radar is a form of remote sensing in which a microwave radiation signal is used. When the radiation is sent out, it comes back down and gives us information about the weather conditions to be expected. We can learn things such as density of the precipitation, the red areas are generally more dense, and also the rotation of the storm. Doppler is used a lot with hurricanes to help meteorologist track their paths. When the pulse is sent out of the transmitter and it bounces off of the precipitation and hits the receiver again, it now has a different frequency, this new frequency can be used to calculate the velocity of the rain. Doppler radar is a big help in finding out the velocity of precipitation heading in.
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