Attenuation rates of coastal radar signals at 25 MHz
Article first published online: 7 DEC 2012
Copyright 1984 by the American Geophysical Union.
Volume 19, Issue 1, pages 319–324, January-February 1984
How to Cite
1984), Attenuation rates of coastal radar signals at 25 MHz, Radio Sci., 19(1), 319–324, doi:10.1029/RS019i001p00319., and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 22 SEP 1983
- Manuscript Received: 11 JUL 1983
The attenuation rate of the ground wave signal with range is a factor limiting the performance of coastal radars. We show that observed attenuation rates are less than theoretically predicted rates at 25 MHz. This result, contrary to earlier findings at lower frequencies, suggests the onset of tropospheric ducting above 20 MHz. The attenuation rates for various sea states and distances are tabulated to allow estimates of system performance near 25 MHz.