Ionospheric distortion of HF signals
Article first published online: 7 DEC 2012
Copyright 1988 by the American Geophysical Union.
Volume 23, Issue 4, pages 569–579, July-August 1988
How to Cite
1988), Ionospheric distortion of HF signals, Radio Sci., 23(4), 569–579, doi:10.1029/RS023i004p00569., , , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 14 FEB 1988
- Manuscript Received: 21 SEP 1987
The channel transfer characteristics of high-frequency (HF) radio signals propagating through the disturbed ionosphere were measured in a series of experiments conducted in the polar cap, auroral, and equatorial regions. Transmissions over one-hop F layer paths were observed to be distorted in the range (propagation time) and Doppler domains on the order of hundreds of microseconds and tens of hertz, respectively. A frequency-modulated continuous wave (FMCW) waveform was used for oblique sounding purposes, and a pseudorandom noise phase modulation with a 20-kHz bandwidth was used to measure range and Doppler spreads. The oblique sounding data were used to define a three-layer quasi-parabolic model of the ionospheric electron density profile, which in turn was used in the calculation of the channel scattering function to compare with the observed range and Doppler spreads.