Physics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...74..373e&link_type=abstract
(ESA and European Physical Society, ESLAB Symposium on Physics for Solar Variations, 14th, Scheveningen, Netherlands, Sept. 16-1
Physics
5
Atmospheric Effects, E Region, Periodic Variations, Solar Activity Effects, Solar Cycles, Time Series Analysis, Cross Correlation, Digital Filters, Irradiance, Maximum Entropy Method, Radiation Effects, Solar Rotation
Scientific paper
The possibilities of correlations between atmospheric and ionospheric parameters and solar variations in a 12-150 day time period are examined. Data in the time series were studied by a maximum entropy method, digital filters, and cross correlation estimates, including periodicities in the E-region of the ionosphere. A broad correlation, centering around the 27 day solar synodic rotation, for the E-region at 2.8 GHz was found; the transition from solar-controlled to internal atmospheric periods is concluded to occur in the E-region. A necessity is perceived to measure the daily variation in solar irradiance for each solar rotation for comparison with observations of the earth atmosphere. Because the studies were for periods of low solar activity, it is recommended that further correlative work concentrate on periods of medium and high solar activity.
Elling W.
Schwentek Heinrich
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