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539
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Instruments
115
Radio
11
Laser
10
Infrared
5
Infrared Radio
3
Laser Radio
1
Infrared Laser
Type
511
Modern Astronomical Observatory
28
Ancient Astronomical Observatory
Altitude
5
146
4
24
4
25
4
30
4
53
4
80
3
17
3
33
3
45
3
58
3
60
3
75
3
85
3
92
3
100
3
107
3
120
3
150
3
152
3
195
3
345
3
1350
3
2552
2
5
2
12
2
18
2
20
2
27
2
28
2
31
2
32
2
40
2
41
2
43
2
44
2
47
2
50
2
61
2
63
2
65
2
70
2
78
2
79
2
81
2
98
2
110
2
115
2
116
2
127
2
132
2
138
2
160
2
172
2
183
2
184
2
221
2
225
2
228
2
238
2
241
2
267
2
280
2
300
2
304
2
314
2
318
2
323
2
372
2
465
2
468
2
476
2
533
2
650
2
2150
1
-2452
1
-2400
1
3
1
6
1
8
1
9
1
11
1
14
1
15
1
16
1
22
1
34
1
35
1
37
1
38
1
39
1
52
1
54
1
62
1
64
1
67
1
69
1
71
1
72
1
73
1
74
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