Accession Number : ADP006191

Title :   The FTZ HF Propagation Model for Use on Small Computers and Its Accuracy,

Corporate Author : FORSCHUNGSINSTITUT DER DEUTSCHEN BUNDESPOST DARMSTADT (GERMANY F R)

Personal Author(s) : Damboldt, Th. ; Suessmann, P.

Report Date : SEP 1989

Pagination or Media Count : 10

Abstract : In the first part of the paper (sections 1 to 6) a self-contained method of estimating the critical frequency and the height of the ionosphere is described. This method was implemented in the computer program FTZMUF2. The accuracy of the method tested against the CCIR-Atlas (Report 340) yielded an average difference of less than 0.1 MHz and a standard deviation of 2.3 MHz. In the second part of the paper (sections 7 to 13) the FTZ HF field-strength prediction method is described which is based on the systematics found in previously field-strength data and implemented in a field-strength formula based thereon. The accuracy of the method - when compared with about 16,000 measured monthly medians contained in CCIR data bank D- equals that of mainframe computer predictions. The average difference is about 0 dB and the standard deviation is about 11 dB.

Descriptors :   *COMPUTER PROGRAMS, *ELECTROMAGNETIC WAVE PROPAGATION, PREDICTIONS, ACCURACY, IONOSPHERE, HEIGHT.

Subject Categories : Computer Programming and Software
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE