Accession Number : ADA190469

Title :   Sudden Ionospheric Disturbance Model Uncertainty Assessment.

Descriptive Note : Final rept. Oct 84-Sep 86,

Corporate Author : NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA

Personal Author(s) : Roy, T N ; Sailors, D B

PDF Url : ADA190469

Report Date : Jul 1986

Pagination or Media Count : 35

Abstract : 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.

Descriptors :   *IONOSPHERIC DISTURBANCES, *IONOSPHERIC MODELS, *PREDICTIONS, *SOUNDING, DATA BASES, ERRORS, FORTRAN, HIGH FREQUENCY, LONG RANGE(TIME), PROPAGATION, SHORT RANGE(DISTANCE), SHORT RANGE(TIME)

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE