Ja. Simpson et al., THE LATITUDE GRADIENTS OF GALACTIC COSMIC-RAY AND ANOMALOUS HELIUM FLUXES MEASURED ON ULYSSES FROM THE SUNS SOUTH POLAR-REGION TO THE EQUATOR, Geophysical research letters, 22(23), 1995, pp. 3337-3340
Measurements from the Ulysses COSPIN (Cosmic Ray and Solar Particle IN
vestigations) High Energy Telescope between 80.2 degrees S solar latit
ude and the sun's equator from September 1994 to March 1995 confirm th
at the modulated fluxes of galactic cosmic rays and anomalous componen
ts depend only weakly on heliographic latitude in the inner heliospher
e at this phase of the salar cycle. The new observations were made ove
r a radial range of only similar to 1 AU during a period of nearly con
stant modulation and thus require less correction for radial and tempo
ral variations in modulation than measurments made during Ulysses clim
b to maximum latitude.