Articles written in Proceedings – Section A
Volume 48 Issue 2 August 1958 pp 84-105
Results of observations of ionospheric drift carried out over a period of 15 months at Ahmedabad on 2·6 Mc./s. and 4·0 Mc./s. by the spaced aerial method are presented in this paper. The prevailing day-time drift was towards north-west in autumn and winter. In summer, and to a less marked degree in spring and autumn, the morning direction of drift was towards east or south-east. The evening direction was always towards north-west. During the night hours, the direction of drift were more spreadout, but the most frequent directions were still towards north-west and southeast. The speeds lay mostly in the range 40–100 m./s. and the mean speed was larger in winter than in summer. The Ahmedabad results are compared with those at other places.
Volume 48 Issue 3 September 1958 pp 1- Erratum