Wavelike irregularities in the mid-latitude 6300 Å airglow |
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| Authors: | MK Andrews |
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| Institution: | Physics and Engineering Laboratory, D.S.I.R., Lower Hutt, New Zealand |
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| Abstract: | The operation of a sky-scanning photometer at mid-latitudes has revealed the presence of elongated irregularities in the 6300 Å airglow, which can have a wavelike nature. Wavefronts are aligned near the magnetic meridian, and the motion is to the east with speeds ～100 m/sec. One airglow event in which the ionosphere appeared to corrugate produced a period of moderate spread-F on a nearby ionosonde.It is not clear from comparison with radio experiments that the airglow disturbances are due to the passage in the ionosphere of gravity waves; some characteristics suggest the irregularities could be due to an instability of the ionospheric plasma. |
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