Accession Number : AD0779678

Title :   An Extended Set of Cosmic-Ray Variational Coefficients.

Descriptive Note : Special repts.,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Gold,R. E. ; Peacock,D. S. ; Shea,M. A. ; Smart,D. F.

Report Date : 04 FEB 1974

Pagination or Media Count : 87

Abstract : Variational coefficients quantitatively relate cosmic-ray spatial anisotropies and spectral changes to variations in ground-based cosmic-ray monitor counting rates. The concept of the variational coefficients was introduced in 1963, and two sets of tables have been published, yet rarely used. One reason for their low usage is related to the specialization of the existing tables for studies of diurnal variations. The authors have calculated variational coefficients that are applicable to the analysis of a wide variety of transient cosmic-ray phenomena. They differ from the existing tables in that they are calculated for (1) a wide range of upper limiting rigidities from 29 to 500 GV; (2) power law rigidity spectra extending to exponents as high at +1.6; (3) spatial profiles independent of latitude; and (4) longitudinal profiles including square waves of 10 degrees, 30 degrees, 60 degrees, and an isotropic case. (Author)

Descriptors :   *Cosmic rays, Diurnal variations, Amplitude, Phase, Tables(Data), Power spectra

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE