UHF Scintillation Characteristics as Observed From Keflavik, Iceland. Preliminary Report.
Abstract
This is a study of characteristics of low-elevation and high-latitude scintillation. Transmissions at 360 MHz from ATS-6 were received at Keflavik, Iceland, during June, September, and October and were analyzed to extract information related to the amplitude scintillation introduced by ionospheric and/or tropospheric inhomogeneities. This report describes the data acquisition and processing procedures and some interim results. The overall average scintillation index S sub 4 was found to be 0.15, and the 1-99% fading range was about 3.5 dB. The scintillation was found to be more strongly controlled by magnetic than solar activity, as expected. The amplitude statistics were found to be non-Rayleigh, and the smaller scintillation levels observed in this study were roughly approximated by the Nakagami-m model. The power spectra exhibited a power-law rolloff from a corner frequency of 0.067 Hz with an index of -2 on the average. Generally 50% of the scintillation power was provided by frequencies less than 0.03 Hz, and the fade-duration and fade-interval distributions were typically exponential.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 1978
- Accession Number
- ADA055760
Entities
People
- C. G. Myers
- J. M. Goodman
- P. L. Watkins
- R. Hogg
Organizations
- United States Naval Research Laboratory