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Daily Mean Sunspot Numbers for September 1999

DayMn. Raw Ras.d.       Mn. Rak  s.d.
1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

164

148

150

157

144

147

136

112

73

55

19

51

76

93

114

120

155

160

163

183

174

189

195

206

197

189

191

170

151

125

5.5

6.0

6.5

6.2

5.4

5.6

5.3

6.7

4.5

8.6

2.3

8.1

8.8

8.0

7.5

6.7

6.2

8.4

8.9

9.8

8.6

10.6

9.7

10.5

9.5

8.9

9.9

9.1

6.7

4.3

  138

126

119

127

115

120

116

100

62

53

16

49

68

85

99

101

132

130

132

157

139

146

159

169

157

154

155

135

127

107

4.1

4.1

4.3

4.9

3.9

4.4

4.0

6.6

4.7

9.8

1.7

9.9

9.2

8.3

6.9

6.0

5.3

5.6

5.5

8.4

6.5

7.8

6.6

7.7

6.1

6.4

7.4

7.5

4.2

3.5

Means:140.3  116.5 
No. of Observations: 1124
No. of Observers: 68

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