Accession Number : AD0610940

Title :   GEOGRAPHIC DISTRIBUTION OF IONOSPHERIC DISTURBANCE IN THE F2 LAYER,

Corporate Author : DIRECTORATE OF SCIENTIFIC INFORMATION SERVICES OTTAWA (ONTARIO)

Personal Author(s) : Lavrova,E. V.

Report Date : APR 1963

Pagination or Media Count : 15

Abstract : An analysis was made of ionospheric disturbance synoptic charts and of longitudinal distribution graphs of the percentage departures of the critical frequency. It was concluded that: For a day or two before the commencement of a magnetic storm the departure curves in the mean lie above the zero level. At the commencement of a magnetic storm the negative departures increase, reaching 80%, with the maximum negative departures mainly associated with longitudes 180 deg W - 70 deg E. During an active storm period the negative departures extend to all longitudes, and are as much as 60-80%. The maximum negative departures are at longitudes 180 deg W - 70 deg E. During this period total absorption is observed at longitudes 80-140 deg W. Such distribution, it seems, may be explained by dependence of delta f sub oF2 on geomagnetic latitude. At the end of a magnetic storm the curves are observed to rise toward zero level. Consideration was given to how these conclusions could possibly be applied in the practical work of short-term forecasting of radio conditions.

Descriptors :   (*IONOSPHERIC DISTURBANCES, GRAPHICS), MAGNETIC STORMS, RADIOFREQUENCY INTERFERENCE, DISTRIBUTION, IONOSPHERE, GEOGRAPHY, MAPS

Distribution Statement : APPROVED FOR PUBLIC RELEASE