Accession Number:

AD0266105

Title:

FIXED AZIMUTH SWEEP FREQUENCY BACKSCATTER OBSERVATIONS FROM 27 TO 54 MC/S

Descriptive Note:

Corporate Author:

PUERTO RICO UNIV MAYAGUEZ

Personal Author(s):

Report Date:

1961-01-01

Pagination or Media Count:

1.0

Abstract:

As a result of a fixed azimuth sweep frequency backscatter observations from 27 to 54 mc performed from December 1960 to June 1961, it was found that transequatorial echoes are of two types 1 simple two hop propagation supported by high density concentrations at geographic latitudes 5 degrees north and 35 degrees south and 2 propagation of low angle rays supported by the decreasing ionization gradient on the far side of the 5 degree latitude concentration and the increasing gradient side of the 35 degree latitude concentration. Also, echoes at F-2 layer heights whose range is independent of frequency were observed frequently in the south direction looking from Puerto Rico. These echoes are e plained in terms of high density irregularities imbedded in the F-2 layer having durations from a few minutes to a few hours. These irr gulariti s are more frequent on the lower edge of the layer. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE