Investigtion of Inner Belt Flux Anisotropies

We investigate pitch angle distributions in the inner radiation belt for L-shells between 2-2.5 REarth and in the equatorial regions with B/B0 of 12 MeV) for the L-shell 2 – 2.25 RE and lower (n=2-4) for the higher energy channels (>43 MeV). For L-shell= 2.25-2.5 RE the anisotropy factors for the lower energy channel are also large (n=6-7) and for the higher energy channels low (n=2-6). Similar behaviour is found for the PROTEL data. In the low energy channel (>11 MeV) the highest anisotropy (n=5.5) is found. During the storm the anistropy increases to about 20 in the higher energy channels (>44 MeV) and stays elevated in the post-storm period.