Accession Number : AD0277362

Title :   INVESTIGATION OF RADIO AURORA, PROJECT AURORA II

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : FLOOD,WALTER A.

Report Date : MAY 1962

Pagination or Media Count : 1

Abstract : Existing experimental evidence is shown to be consistent with the idea that auroral backscatter arises from turbulent fluctuations of electron density as described by a Kolmogoroff spectrum. An inner scale of turbulence of one meter is shown to be consistent with the experimental data. It is further shown that the scatter cross section for frequencies greater than 1000 Mc cannot be accurately predicted. A brief summary of an analysis of auroral backscatter amplitude distribution is presented. Occasionally Rice type amplitude distributions are obtained at 49.7 Mc. These distributions admit of only one explanation - that on occasion, over relatively large regions and for intervals of only a few minutes, the electron density in the auroral ionosphere is in excess of 2 x 10 to the 7th power electrons per cubic centimeter. (Author)

Descriptors :   *AURORAE, *RADIO ASTRONOMY, DENSITY, ELECTRONS, PROPAGATION, RADIO WAVES, SCATTERING, VERY HIGH FREQUENCY, WAVE PROPAGATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE