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FIRST AND SECOND HARMONICS OF THE DAILY VARIATION OF THE COSMIC RAY NUCLEONIC COMPONENT AT UPPSALA AUG. 31, 1956 TO AUG. 31, 1957

Journal Article · · Arkiv Fysik
OSTI ID:4215855
;
An analysis of the daily variation of the cosmic ray nucleonic component at Uppsala for August 31, 1956 to August 31, 1957 is presented. To study the correlation with geomagnetic activity, the days were divided into five classes according to their K/sub p/-indices. The first and second harmonics for each class of days were determined for the period Aug. 31, 1956 to Aug. 31, 1957. The disturbing influence of the sharp intensity drop following the onset of a Forbush decrease concerrning the daily variation is discussed. The influence is found to be negligible not only as far as the yearly mean is concerned but also as regards the 27 days sun rotation periods. The influence becomes serious only in the case of the most disturbed days when phase and amplitude are studied as functions of the K/sub p/-index. The mean value of the time of maximum is found to be 1300 GMT for the first harmonic and 0530 GMT for the second harmonic. The yearly mean of the amplitude is 0.32% in the first case and 0.034% in the second. The dependence of phase and amplitude on the K/sub p/-index is very small. (auth)
Research Organization:
Universitet, Uppsala
NSA Number:
NSA-14-000789
OSTI ID:
4215855
Journal Information:
Arkiv Fysik, Journal Name: Arkiv Fysik Vol. Vol: 16
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

COSMIC RADIATION
DISTURBANCES
DIURNAL VARIATION
EARTH
FORBUSH DEPRESSION
MAGNETIC FIELDS
NUCLEONS
PHYSICS
ROTATION
SUN
SWEDEN
TURBULENCE
VARIATIONS