Wednesday, December 21, 2011
Dual Pol Radar
All of us are familiar with the "reflectivity" product on radar. We use this product the most.
The NWS radar in Memphis has been upgraded to be a Dual Polarization radar! This is a project that is upgrading every NWS radar in the country by the end of 2013. Memphis is one of the first batch of radars to be upgraded. This is VERY good for us. Dual Pol radar not only sends out horizontal pulses, but vertical pulses. This helps to measure "WHAT" is falling from the sky and the size.
The new data will help determine precipitation types, rainfall rates, and hail detection. At KAIT, we have upgraded our radar display systems to have access to this data and to be able to show it to you on air! With that said, I'm not sure how often we will show it yet, but it is available. Here's what some of the data looks like using the same rain in the above images from last night.
The above image is "Correlation Coefficient": or CC data. I plan on using this to track ducks! LOL CC shows the behavior of of the pulses horizontally and vertically between each volume. Birds are not uniform and will change often and will be easily detected. Plain ole rain wills show up in shades of pink as seen above. If there was hail or snow with big snowflakes, it would react differently and you would see some shades of blues and greens, reds and oranges.
There's still a lot of studying to be done, but I'm excited about this new data we have to use at KAIT! To my knowledge, we may be the only television station with Dual Pol data for on-air use in Arkansas at this time. I'm still checking on that.
Have a great day!
Posted By: Ryan at 11:01 AM