Accession Number : AD0907896

Title :   Propagation Delay Time for HF Signals.

Descriptive Note : Technical rept. no. 40,

Corporate Author : ILLINOIS UNIV AT URBANA RADIO RESEARCH LAB

Personal Author(s) : Ernst, Edward W.

Report Date : JAN 1973

Pagination or Media Count : 139

Abstract : The results of a series of experiments to determine the propagation delay time for signals in the HF band over a number of paths are reported. The experiments were conducted so that the propagation delay-time for two paths was determined simultaneously; thus, the difference in the propagation delay-time could be determined for those two paths. The analysis of the data shows the variation of the delay-time differences as a function of frequency, time of day, and other parameters. The experiment was carried out using FM ionosonde equipment. (Author)

Descriptors :   *ATMOSPHERIC SOUNDING), (*PROPAGATION, HIGH FREQUENCY), (*RADIO TRANSMISSION, IONOSPHERIC PROPAGATION, RADIO NAVIGATION, DIRECTION FINDING, TIME, FREQUENCY MODULATION, LORAN, DIGITAL COMPUTERS, PUNCHED CARDS, MAGNETIC TAPE, GRAPHICS, STATISTICAL ANALYSIS, RADIO SIGNALS, MULTIPATH TRANSMISSION.

Subject Categories : Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE