Abstract
The South African Council for Scientific and Industrial Research (CSIR) has recently embarked on a program for recording ionospheric heights and critical frequencies in South Africa, and, in collaboration with other ionospheric bureaus, provides a forecasting service for local users.Two recording stations have been installed—one in Johannesburg and the other near Cape Town. Data from these two stations are analysed by the staff of the Telecommunications Research Laboratory (TRL) of the CSIR, and, in addition to being used as a basis for local forecasting, are circulated to the United Kingdom, Canada, United States of America, Australia, New Zealand, and India. Reciprocal information from these centres is also received.
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