From: Statistical study about the influence of particle precipitation on mesosphere summer echoes in polar latitudes during July 2013
Days in July
Pearson linear correlation coefficient
Spearman rank correlation coefficient
8
− 0.24
− 0.29
(P = 0.00)
10
0.05
0.07
11
0.24
0.34
12
− 0.03
−0.17
(P = 0.44)