What Is Correlation Coefficient?
A radar product showing how alike the things in the beam are. Plain rain or snow scores high; mixed precipitation, hail, or tornado debris scores low. In technical terms: The correlation between horizontally and vertically polarized backscattered signals within a pulse volume, from 0 to 1; pure rain or snow typically above 0.97, melting layer and mixed phases 0.85-0.95, large hail lower, and non-meteorological targets such as lofted debris often under 0.8.
Also called: CC, RhoHV
Correlation Coefficient In Plain English
A radar product showing how alike the things in the beam are. Plain rain or snow scores high; mixed precipitation, hail, or tornado debris scores low.
The Technical Definition
The correlation between horizontally and vertically polarized backscattered signals within a pulse volume, from 0 to 1; pure rain or snow typically above 0.97, melting layer and mixed phases 0.85-0.95, large hail lower, and non-meteorological targets such as lofted debris often under 0.8.
Lessons That Use Correlation Coefficient
- Finding Tornadoes On Radar Unit 8: Tornadoes
- Dual-Polarization: ZDR, CC And KDP Unit 12: Radar Science
