Accession Number : AD0641795

Title :   IONOSPHERIC RESEARCH.

Descriptive Note : Quarterly progress rept. no. 11, 1 Apr-30 Jun 66,

Corporate Author : ILLINOIS UNIV URBANA ELECTRICAL ENGINEERING RESEARCH LAB

Personal Author(s) : Webb,H. D.

Report Date : OCT 1966

Pagination or Media Count : 27

Abstract : Moon-reflected signals were received on 36 days for a total of approximately 378 hours at 150.6 mc and approximately 67 hours at 413.25 mc. Tables and a graph of observation times are presented. Calculations are virtually complete through the April observations. The influence of the April 15 solar flares is not evident in the data. Quarterly averages of electron content centered around March 21, June 21, and September 21 are presented. The one centered around Jun 21 shows the late afternoon maximum that appears in the summer. The gain of the 28 foot paraboloid using the sun as a source and a comparison method is 18.9 plus or minus 0.5 db. A phase-lock unit to keep the 150.6 mc receiver tuned is being built and installed as part of an automatically operated station. A coordinate converter to control the antenna was procurred. The evaluation of methods of resolving the n x 180 degrees ambiguity in lunar Faraday rotation data and the calculation of electron temperatures is being continued. The Atlas of Lunar Data for 1961 through 1964 is ready for printing Volume IV of the atlas, for 1965 data, is being prepared. (Author)

Descriptors :   (*IONOSPHERE, SCIENTIFIC RESEARCH), (*MOON, REFLECTION), SURFACE PROPERTIES, ANTENNAS, SOLAR FLARES, MAGNETOOPTICS

Subject Categories : Astrophysics
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE