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Table 4 Comparison of maximum Ne (m−3) for events in 1 h, having positive and negative Spearman rank correlation coefficient values

From: Statistical study about the influence of particle precipitation on mesosphere summer echoes in polar latitudes during July 2013

Days in July

UT (h:min:s)

Spearman rank correlation coefficient

Maximum Ne (m−3)

10

04:00:04–04:47:31

− 0.25

6.98 × 1011

04:50:00–04:53:31

0.49

2.88 × 1011

04:54:14–04:59:55

0.72

2.30 × 1011

05:00:04–05:02:38

0.35

2.14 × 1011

05:03:26–05:09:16

0.42

4.93 × 1011

05:10:33–05:25:36

− 0.31

5.43 × 1011

05:38:00–05:59:55

− 0.20

6.55 × 1011

06:31:07–06:40:00

− 0.21

4.02 × 1011

06:45:07–06:54:38

0.19

3.62 × 1011

11

08:09:16–08:15:31

0.52

1.65 × 1011

08:42:14–08:59:55

− 0.31

3.24 × 1011