NASA Official: Adam Szabo
Curators: Robert Candey,
Alex Young, Tamara Kovalick
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| Southern Auroral Zone - Day |
During this time, Polar is passing through the dayside
Southern Auroral Zone on its northward journey. The
wideband receiver is connected to the Electric Eu antenna.
The strongly spin-modulated auroral hiss signal is heard
throughout this interval at frequencies from a few hundred
Hz up to at least 11 kHz, the upper measurement range of this
filter. At about 08:06:56 UT, we hear the result of a
broadband electrostatic burst which is probably associated
with crossing the source field line. Here, wave-particle
interactions play a dominant role in helping to expalin
the electrostatic bursts in the wave data.
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| Northern Auroral Zone - Night |
During this time, Polar is passing through the nightside
Northern Auroral Zone on its northward journey. The
wideband receiver is connected to the Electric Eu antenna.
The strongly spin-modulated auroral hiss signal is heard
throughout this interval at frequencies from a few Hz
up to about 4 kHz. The hiss observed at this time is
very intense as the automatic gain control is seen ratcheting
to maximum gain (0 dB). At about 11:14:20, we hear two
intense bursts occurring just below the plasma frequency
around 4 kHz.
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| Northern Polar Cap - Night, Auroral Kilometric Radtioation |
During this time, Polar is passing through the nightside
Northern Polar Cap on its southward journey. The wideband
receiver is connected to the Electric Eu antenna. Intense
auroral kilometric radiation is heard at this time, con-
sisting of many discrete narrowband emissions with rapidly
varying center frequencies. These emisions are responsible
for the rising and falling tones of varying frequency heard
during this time interval.
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Last Updated: 02/07/97