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March 14, 1983
220
10
k
22.5
2
40
2
10
260
230
k
24.5
2
80
2
50
2100
270
2
120
2
90
1
10
Frequency (Hz)
100
1000
1
100
1000
10
Frequency (Hz)
(a)
(b)
Figure 4.5c
Spectra of density and electric field irregularities in equatorial spread F as
observed from a rocket launched March 14, 1983, from Punta Lobos, Peru: (a) spec-
trum of density irregularities; (b) spectrum of electric field irregularities. The dashed line
indicates the background spectrum measured during a quiet period. [After LaBelle et al.
(1986). Reproduced with permission of the American Geophysical Union.]
Jicamarca
50 MHz backscatter
19 March 1977
48
36
24
12
6
600
500
400
300
200
100
19
20
21
22
23
758 W time
ANCON
137 MHz
19 March 1977
GOES - 1
28
24
20
16
12
8
4
19
20
21
22
23
758 W time
Figure 4.6
Simultaneous Jicamarca backscatter power and VHF scintillation intensity
due to irregularities in the same scattering volume. [After Basu et al. (1978). Reproduced
with permission of the American Geophysical Union.]
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