Accession Number:

AD0625413

Title:

A STUDY OF HIGH-FREQUENCY DIRECTIONAL PROPAGATION OVER A 450 KILOMETER EAST-TOWEST PATH. PART I. DESCRIPTION OF THE DIRECTIONAL PROPAGATION EXPERIMENT (THE COLUMBUS EXPERIMENT). PART II. AN ATLAS OF REDUCED DATA.

Descriptive Note:

Rept. for 13 Nov 62-4 Mar 64,

Corporate Author:

RADIOLOCATION RESEARCH LAB UNIV OF ILLINOIS URBANA

Personal Author(s):

• Donnelly,R. F.
• Detert,D. G.
• Bailey,A. D.

Report Date:

1965-11-01

Pagination or Media Count:

205.0

Abstract:

The Columbus Experiment was a relative short range HF radiolocation experiment in which measurements were made of the azimuthal and vertical incidence angles of arrival and the relative time delay of pulse transmissions from Columbus, Ohio 450 km range due east of Urbana. All observations were taken during late afternoon hours and continuing until the propagation path failed. The angle of arrival measurements were made employing a six-element interferometer system in a configuration of three two-element interferometer pairs. Vertical incidence ionosondes were operated at the midpoint and the receiving end of the path. The basic measurements of azimuthal and vertical incidence angles of arrival were taken on 126 days during the period of the Columbus Experiment. The measurements are presented point by point, approximately two hours on each graph, with both the time and angle scales being identical throughout to facilitate comparisons. It should be emphasized that no averaging of any sort is present in this data, and that each point represents one specific measurement of azimuth or vertical incidence angle.

Descriptors:

• PROPAGATION
• RADIO WAVES
• IONOSPHERE
• ANGLE OF ARRIVAL
• TIME
• OHIO

Subject Categories:

• Direction Finding
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE