All Sky Imager

The All Sky Imager is operated monthly at night during low moon periods. It records airglow images of hydroxyl (OH), atomic (O) green line and sometime Na emissions. The total number of nights and hours in each month are summarized in the following table.

Total number of nights and hours (in parentheses) in each month with OH (red), greenline (green) and Na (orange) data
Year JanFebMarAprMayJunJulAugSepOctNovDec
2009 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5 (51)
 
 
5 (49)
 
 
12 (140)
 
 
24 (280)
 
 
201014 (163)
 
 
16 (181)
 
 
19 (211)
 
 
26 (318)
 
 
16 (192)
 
 
11 (127)
 
 
19 (222)
 
 
24 (267)
 
 
10 (117)
 
 
 
 
 
 
 
 
1 (12)
 
 
20119 (105)
 
 
1 (5)
 
 
6 (30)
 
 
12 (133)
 
 
22 (249)
 
 
21 (236)
 
 
22 (257)
 
 
17 (168)
2 (6)
2 (6)
19 (63)
18 (47)
18 (47)
13 (52)
13 (39)
13 (39)
16 (64)
16 (48)
16 (48)
21 (84)
21 (63)
21 (63)
20126 (20)
6 (23)
4 (7)
2 (5)
2 (8)
 
13 (51)
11 (44)
 
3 (6)
3 (8)
 
1 (3)
1 (4)
 
2 (4)
2 (7)
 
22 (93)
22 (139)
 
2 (3)
2 (4)
 
11 (48)
11 (72)
 
4 (14)
4 (21)
 
7 (22)
7 (35)
 
6 (13)
6 (19)
 
2013 
 
 
6 (20)
7 (36)
 
14 (48)
14 (71)
 
11 (41)
11 (61)
2 (6)
 
 
 
9 (37)
9 (55)
 
7 (30)
7 (45)
 
5 (11)
5 (17)
 
4 (16)
4 (24)
 
13 (49)
13 (73)
 
9 (25)
9 (38)
 
1 (4)
1 (5)
 
201414 (44)
14 (65)
 
12 (36)
12 (53)
 
8 (25)
8 (37)
 
11 (36)
11 (54)
 
5 (21)
5 (32)
 
 
 
 
6 (17)
6 (25)
 
16 (53)
16 (79)
 
21 (78)
21 (117)
 
12 (42)
13 (67)
 
 
 
 
 
 
 
201516 (60)
16 (92)
 
9 (31)
10 (47)
 
10 (32)
10 (48)
 
15 (53)
16 (81)
 
8 (31)
8 (46)
 
2 (10)
3 (18)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

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