Spectral Analyses of Direction of Arrival of High Frequency Radio Signals.
Abstract
A time series of rapidly sampled (almost continuous) angle of arrival data obtained by two different methods on a large aperture CDAA are analyzed for spectral content using Fourier methods. The sampling rate was fast enough that spectral components as high as 0.1 Hertz could be found if present. The results are shown as CALCOMP plots of amplitude of spectral content vs. frequency. In addition to diurnal and quasi-twenty-minute period components the analyses show periods of two, five, and eight minutes. Also indicated in certain data are shorter periods of 60, 48, 22.5, 18, and 14.5 seconds, respectively. There appear to be some significant differences between the spectral content as measured by the two methods. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1970
- Accession Number
- AD0877702
Entities
People
- A. D. Bailey
- William C. Kabele
Organizations
- University of Illinois Urbana–Champaign