Interplanetary Protons (E sub p approx = 1 MeV) 1973-1986 and out to 22.4 AU.
Abstract
This paper uses a homogeneous body of data on mean annual values N of the interplanetary intensity of protons (0.61 < Ep < 3.41 MeV) in the period 1973-1986 and over the heliocentric radial distance range 1.0 < r < 22.4 AU. It is found that the quantity N(r-sq) is well correlated with the annual mean sunspot number, with the exception of anomalously low values in 1979, 1980 (in particular), and 1981. The anomaly is attributed to a gross change in the interplanetary magnetic field associated with reversal of the polarity of the sun's polar field. Keywords: Interplanetary Protons; Solar activity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1987
- Accession Number
- ADA183842
Entities
People
- James A. van Allen
Organizations
- University of Iowa