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10
2
10
0
Wallops Island
1 0030 EST 12 Apr. 1963
2 2300 EST 22 Jun. 1965
3 0009 EST 22 Feb. 1968
4 2306 EST 11 Sep. 1969
5 0003 EST 1 Nov. 1972
6 2330 EST 18 Apr. 1974
7 2340 EST 29 Jun. 1974
8 0001 EST 10 Aug. 1977
9 0001 EST 5 Jan. 1978
5
10
1
10
21
6
3
10
0
5
10
22
8
1
4
7
9
6
10
21
10
23
2
8
Least squares fit
10
22
EXP (0.46I)
q
5
6.6
3
10
26
EXP (0.48I)
E
T
5
2
3
7
In
|
D
ST
|
I
5
K
p
1
10
22
10
24
012345678
Magnetic activity, Index, I
9101112131415
Figure 6.11b
Variation with magnetic activity of the nighttime ionization rate in the
upper E region and of the particle energy flux obtained from rocket experiments. [After
Voss and Smith (1979). Reproduced with permission of the American Geophysical
Union.]
200
e
2
180
Total
160
Nike Apache 14.542
27 Sept. 1978
00:30 LST (05:30 UT)
K
p
551, D
ST
5269
140
120
60
80
Count rate (s
21
)
100
120
140
0
20
40
Figure 6.11c
Total energetic particle count rate and count rate of electrons only as a
function of altitude. (Courtesy of L. Smith.)
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