
%0 Journal Article
%A Dyson, PL 
%T Electron Densities and Scale Heights in the Mid-latitude Topside Ionosphere
%J Australian Journal of Physics
%D 1967/08/01
%V 20
%N 4
%P 401-406
%K 
%R https://doi.org/10.1071/PH670401
%U https://www.publish.csiro.au/paper/PH670401 
%X The diurnal and latitudinal variations of electron density and plasma scale height in the topside ionosphere during summer and winter have been calculated from Alouette I ionograms recorded at Woomera. The electron density behaviour is anomalous in that the winter night-time values are generally as large or larger than those occurring during the day. At heights near 1000 km the winter night-time values are greater than those for night-time summer. The behaviour of the scale height is very similar to that reported by others for the mid-latitude region of the northern hemisphere and implies that at night-time the transition level from 0+ to lighter ions occurs at heights of about 550 km in summer and 500 km in winter. 
