Title :
Note on the Fifteen-Month Period in Solar Activity, Terrestrial Magnetism, and Radio Reception
Author :
Pickard, Greenleaf W.
Author_Institution :
R.C.A. Victor Co. of Massachusetts, Boston, Mass.
fDate :
3/1/1931 12:00:00 AM
Abstract :
A marked 15-month period has been found in sun spots, terrestrial magnetism, and radio reception. Early in 1929 this cycle abruptly changed phase by about 60 deg., 210 deg., and 160 deg., respectively, for these elements, resulting in changed relations between solar activity and the two geophysical measures.
Keywords :
Geophysical measurements; Harmonic analysis; Magnetic analysis; Magnetic field measurement; Meteorology; Observatories; Phase measurement; Smoothing methods; Sun;
Journal_Title :
Radio Engineers, Proceedings of the Institute of
DOI :
10.1109/JRPROC.1931.222333
