The Angular Distribution of Spread-F Returns from an Artificially Modified Ionosphere.
Abstract
A 32 element HF phased array has been used to study the angular spectrum of spread-F returns from an ionosphere modified by the powerful radio frequency heater transmitter at Platteville, Colorado. The diagnostic radar is a coherent pulse system which provides an angular resolution of 2.7 degrees in azimuth and elevation at the midband frequency of 7.5 MHz, a range resolution of 30 Km, and a Doppler resolution of 0.08 Hz. The results are presented in the form of sky maps (brightness versus azimuth and elevation) of the returns as a function of group delay Doppler shift, polarization, and sounding frequency. The principal result is that the returns which suffer the greatest group delay at a given sounding frequency come from a direction looking up the earth's magnetic field and exhibit negative Doppler shift. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1974
- Accession Number
- AD0780552
Entities
People
- E. M. Allen
- G. D. Thome
- P. B. Rao
- R. L. St. Germain
Organizations
- RTX