new technological weather detection

by karthick
(kumarapatnam, karnataka, india)

this is a new technology of weather detection. Using this technology, microwave radio waves are sent out of the antenna and they get deflected by the clouds, water particles in air etc. the reflected back signals are caught and the data from signals are decoded by using computers.

Barry's Response - A short and sweet description of weather radar. Thanks, K.

One of the basic data processing system functions used for interpreting weather radar output is a system that integrates output from several scans into one useful scan. We call this the Constant Altitude Position Plan Indicator.

I'll start with a position plan indicator PPI: The radar apparatus spins around scanning the nearby sky and while doing so it points upward at a specific angle. After a complete spin the images are mapped out on the surface of a cone...an upside down cone with its point at the radar station. That means the further a single piece of data is from the radar, the higher its altitude above the ground. That might be useful but normally we'd rather see a...

Constant Altitude Position Plan Indicator CAPPI - If readings from several angles are given, each on its own cone, all the cones can be placed with their vertices together and a horizontal slice taken across all of them, with each contributing a concentric ring across the horizontal plane like the rings in a tree stump. The software takes a bit of data from each cone to create a composite radar image at any desired altitude. We find this display much more useful.

Here is a more complete explanation of radar. This is not without its problems, but it IS functional.

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