The 4/6-GHz ionospheric scintillation measurements

Most of the data presented were collected at the Taipei Earth Station from June 1976 to June 1977, the first year of sunspot cycle 21, during which the low solar activity level began to increase. Annual and worst month cumulative statistics for ionospheric scintillations were provided for use in system studies and planning. The worst month statistics varied considerably, depending on the definition of worst month; therefore, a formal definition for engineering applications was warranted. Power spectral density analyses confirmed an f to the minus 3rd power dependence, indicating that the conventional weak scattering theory for a thick screen with a power law electron density fluctuation spectrum of p = 4 would be adequate to explain the weak gigahertz ionospheric scintillation events observed at Taipei.