DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
AD0743506
Title:
Annual and Solar-Magnetic-Cycle Variations in the Interplanetary Magnetic Field, 1926-1971,
Corporate Author:
STANFORD UNIV CALIF INST FOR PLASMA RESEARCH
Report Date:
1972-04-01
Abstract:
The polarity of the interplanetary magnetic field has been inferred by Svalgaard from observations of the polar geomagnetic field during the interval 1926-1971. On the basis of a few years of spacecraft observations Rosenberg and Coleman have suggested that there may be an annual variation in the predominant polarity of the interplanetary field. The present analysis of 45 years of inferred field polarity shows clearly an annual variation and also a variation of about twenty years, which may be associated with the solar magnetic cycle. The annual variation changes its predominant polarity within a few days of the times when the heliographic latitude of the earth is zero. Author
Supplementary Note:
Sponsored in part by Grant NSF-GA-31138.
Pages:
0021
Contract Number:
N00014-67-A-0112-0068
Contract Number 2:
NGR-05-020-559
File Size:
0.00MB
