I am working on a project in predicting the weather and I had a few brief questions.
I understand that radar works by bouncing waves off of precipitation and measuring reflectivity. I have a variable and the definition for the variable is as follows, "10th percentile of reflectivity values in 5x5 neighborhood around the gauge." Can someone please explain this? I am guessing that this means it measures the strength of the signal returning from a 5x5 area around the measuring gauge? Is this correct? What does it mean that it is in the 10th percentile? The 50th percentile? The 90th?
The next variable is, "Maximum reflectivity values in the vertical column above gauge in dBZ". I know that dBZ is used to measure reflectivity, but what does it mean in the vertical column above the gauge?
I understand Correlation Coefficient to be the measure of how similarly the horizontally and vertically polarized pulses are behaving within a pulse volume. Can someone please tell me what a pulse volume is?
I really appreciate any help. Most answers I found through my own digging, but I really need help to understand these few questions.