THE APPARENT SIDEREAL DAILY VARIATION OF COSMIC RAY INTENSITY DURING THE RECENT SUNSPOT MINIMUM

Journal Article · Sat Aug 01 04:00:00 EDT 1959 · Phil. Mag.

DOI:https://doi.org/10.1080/14786435908238274· OSTI ID:4211277

Baliga, S P; Thambyahpillai, T

The unusually large changes of phase which occurred in the cosmic ray solar daily variation during the year 1954 were found by Conforto and Simpson to simulate strong sidereal daily variations. These authors suggested that their results represent a genuine sidereal effect which is observable only during periods of extremely low solar activity, as in 1954. A systematic search for sidereal effects during this year was made using the results from the Carnegie Institution stations as well as Colombo, Hobart, and Tokyo. Although no significant sidereal effects were seen at Colombo, the other data show substantial sidereal daily variations with a remarkable consistency in phase. The time of maximum at the equator was 19 hr L.Sid.T. while at higher latitudes it was about 22 hr L.Sid.T. The character of the solar diurnal variations and the relations between their seasonal changes and sidereal daily variations are discussed and it is concluded that at least a part of the observed sidereal effects were spurious. (auth)

• Research Organization: Univ. of Ceylon, Colombo
• Sponsoring Organization: USDOE
• NSA Number: NSA-14-001970
• OSTI ID: 4211277
• Journal Information: Phil. Mag., Journal Name: Phil. Mag. Vol. Vol: (8) 4
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COSMIC RADIATION
DAILY VARIATIONS
EARTH
LATITUDE EFFECT
MAGNETIC FIELDS
PHYSICS
RADIATIONS
SUN
SUNSPOTS
VARIATIONS