Accession Number:

AD0274682

Title:

STUDY OF HF STEEP-ANGLE ANOMALIES

Descriptive Note:

Corporate Author:

PAGE COMMUNICATIONS ENGINEERS INC WASHINGTON D C

Personal Author(s):

Report Date:

1962-03-01

Pagination or Media Count:

1.0

Abstract:

Results are given of a study of hf steep-angle anomalies by means of a program of signal analysis and data recording and through theAPPLICATI N OF MAGNETOIONIC THEORY. Two types of anomalies were studied Cusp fading, observed as a periodic variation of signal strength over paths of several hundred miles, and the two-tone effect, observed when receiving WWV over a 58-mile path. Conclusions were that periodic fading to deep cusps apparently resulted from magnetoionic interference in the F layer. Changes in median recorded level of WWV reception with tone modulation were explicable as a diversity effect for the ground backscatter signal and a result of dissimilar carrier and sideband antenna patterns for layer propagation. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE