Upper atmospheric studies : some observations of the south tropical OI airglow phenomenon
Degree GrantorUniversity of Canterbury
Degree NameDoctor of Philosophy
An account is presented of a series of observations of the dynamic behaviour of a region of the south tropical airglow·arcs made from Rarotonga (Lat. 21.2° south, long. 159.8° west) with the aid of a large aperture (90 cms), high resolution (½° beamwidth) scanning photometer.
The night airglow is found to be strongly disturbed on many nights, characteristically by elliptical areas of lower than normal intensity drifting in an easterly direction. It was possible to associate their passage with the occurrence of 'spread-F' as observed by the Rarotongan ionosonde.
An attempt is made to account for the airglow processes; suggestions are made concerning the possible origin of the disturbances; and their presence is examined in the light of the trans-equatorial propagation of V.H.F. signals from Hawaii, as recorded at Rarotonga.