Sudden Ionospheric Disturbance Model Uncertainty Assessment

摘要

The impact of a sudden ionospheric disturbance (SID) on HF propagation is discussed. The development of an empirically derived relationship (SIDGRID) to model this impact is presented. The SIDGRID model compared to 198 observed sounder data points. For distances less than 1500 km, the short-range prediction error was 0.5 MHz and in 95% of the tests the long-range prediction error was less than or equal to 2.0 MHz. Current FORTRAN and BASIC implementations of the model are given in Appendices C and D.