Accession Number:

ADA043896

Title:

Cosmic Ray Variational Coefficients - The Effect of Altitude Variations and Secular Variations,

Descriptive Note:

Corporate Author:

AIR FORCE GEOPHYSICS LAB HANSCOM AFB MASS

Personal Author(s):

Report Date:

1977-01-01

Pagination or Media Count:

7.0

Abstract:

The extended sets of variational coefficients have been examined to ascertain the effects of altitude and also for possible differences arising from secular changes in the earths magnetic field. An examination of the variational coefficients calculated for two closely positioned cosmic ray stations in Europe indicates that the altitude effects are small. A comparison of the variational coefficients calculated for three epochs of the geomagnetic field for Western Hemispheric locations where the geomagnetic field has its most rapid secular change indicates that the secular variation in the vertical cutoff rigidity and associated changes in the asymptotic direction calculations are such that the variational coefficients calculated using either a 1955 or a 1975 model of the geomagnetic field are adequate for most cosmic ray analyses. Author

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE