Correlation coefficient radar

1. What is correlation coefficient radar?
2. What is a CC drop on radar?
3. What does differential reflectivity show on radar?
4. What does CC mean in meteorology?

What is correlation coefficient radar?

Definition: Correlation coefficient (also referred to as ρhv or rho) provides a measure of the consistency of the shapes and sizes of targets within the radar beam. A higher value shows a higher consistency in the size and shape of radar targets, while a lower value indicates greater variability in shapes and sizes.

What is a CC drop on radar?

NWS radars can detect if the objects the radar is bouncing off are the same size and shape. If they are all nearly the same (ie: small raindrops) the correlation coefficient or CC is close to 1. In a storm where rain is mixed with hail the radar is bouncing off different size objects so the CC drops below 1.

What does differential reflectivity show on radar?

Recall that differential reflectivity (ZDR) can tell us about the shape of radar echoes. Hail can come in many shapes, but because it tumbles as it falls, it appears spherical to the radar. This means that hail would likely cause the ZDR to be close 0 dB.

What does CC mean in meteorology?

Cirrus (Ci), Cirrocumulus (Cc), and Cirrostratus (Cs) are high level clouds.