Table 2 The comparison of the station numbers that can be selected for each time in PSO repeated experiment at different KGE and R value intervals.

From: Using particle swarm optimization to improve visibility-aerosol optical depth retrieval method

Number of stations

KGE & R > 0.7

KGE & R > 0.5

KGE & R > 0.3

KGE & R > 0

MODIS

1st experiment

77

221

413

587

2nd experiment

18

25

35

30

3rd experiment

5

7

14

8

4th experiment

1

2

5

8

Total

101

255

467

633

MISR

1st experiment

4

55

252

520

2nd experiment

0

20

35

32

3rd experiment

0

8

17

18

4th experiment

0

0

4

4

Total

4

83

308

574