Accession Number:

AD0270845

Title:

TESTING HYPOTHESES AND ESTIMATING PARAMETERS IN HUMAN GENETICS IF THE AGE OF ONSET IS RANDOM

Descriptive Note:

Corporate Author:

CATHOLIC UNIV OF AMERICA WASHINGTON D C

Personal Author(s):

Report Date:

1962-01-01

Pagination or Media Count:

1.0

Abstract:

Cornell Aer nautical Lab., Inc., Buffalo, N. Y. PROJECT FLAYER. A STUDY OF SPREAD-F ECHOES FROM T E ION PHERE. Final rept., y W. K. Klemperer. 30 Nov 61, 95p. incl. illus. tables, refs. Rept. no. RA-1505-P-1 Contract AF 196047979, Proj. 8653 AFCRL-62-208Uncla sified report DESCRIPTORS Extraterre trial radio waves, Stars. Ionosphere, Radar echo areas, Radar signals, Interference, Radio waves. Interferometers. Identifiers F-layer.A detailed analysis of ionospheric ading during spread-F shows that strong stead components are present at all ranges within the echo proper. Accordingly, one can rule out theories which rely on random scattering processes to explain the pronounced spread in range o served. To investigate the mechanism responsible for spread-F,AN EXPERIMENT WAS DESIGNED TO DETERMINE THE ANGULAR SPECTRUM OF RADIO WAVES REFLECTED FROM THE IONOSPHERE UNDER SPREAD-F conditions. A lobeswept interferometer was operated at spacings rom 5 12 to 12 12 wavelengths. F RINGE VISIBILITY DATA OBTAINED WITH THE INTERFEROMETER INDICATE THAT THE TYPE OF SPREAD-F observed at high geomagnetic latitudes has a narrow angular spectrum. This behavior is attributed to the guiding action of field-aligned irregularities of ionization wit in the F-layer. Similar irregularities are thought to be the cause of radio star scintillation. The height of the irregularities responsi le for radio star scintillation i not kno n accurately, although there are indications that the lie above the F-layer maximum while those responsible for spread-F must clearly lie at or below the -layer aximum. The correlation of spread-F as bserved on an ionosp eric sounder with that o strong 25 cintillation of the radio source Cygnus A at pper culmination is foun to exceed 0.8 at It aca, N. Y. Author 0

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE