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Auroral electrojet electric field waves
Porcupine IV
E
.
65 mV/m S
Porcupine II
E
.
54 mV/m NW
130
130
120
120
110
110
100
100
90
90
0
2500
5000
0
1500
3000
(a)
(b)
“Auroral - E”
E
38.001
E
45 mV/m N
35 mV/m N
.
.
130
130
120
120
Interference
110
110
100
100
90
90
0
2000
4000
0
2500
5000
(c)
(d)
34.008
E
Porcupine III
E
10 mV/m S
.
25 mV/m N
.
130
130
120
120
110
110
. -18.3 dB
2
mV
Hz
100
100
m
, - 41.7 dB
90
90
0
2000
Frequency (Hz)
4000
0
2500
5000
Frequency (Hz)
(e)
(f)
Figure 10.26
Frequency-height sonograms of electric field wave measurements made
during six different auroral zone experiments. The gray levels are identical for all six
sonograms and the dc electric field is noted for each panel. [After Pfaff et al. (1984).
Reproduced with permission of the American Geophysical Union.]
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