Study of Cosmic Ray Modulation Using Ground-Based Neutron Monitors and Spacecraft Cosmic Ray Detectors

点击翻译按钮获取中文摘要

The PI plans to continue the operation of the cosmic ray neutron monitors at Mt. Washington (Po=1.24 GV) and Durham (Pc=1.41) and to continue studies which relate these ground based cosmic ray observations to near Earth cosmic ray telescope data (E 70 MeV) from the IMP series of spacecraft and similar data at large heliocentric distances from the Earth acquired from Pioneer 10 (at 53AU in August 1991), Voyager 1 (at 45.7 AU, latituded 32o) and Voyager 2 (at 33 AU). Using these data they will study the following: 1) The interplanetary cosmic ray radial and latitudinal gradient; 2) Comparison of instantaneous and time-shifted integral E 70 MeV radial gradients; 3) Evaluation of the heliospheric termination boundary, its location and its effects on cosmic rays; and 4) the association of Forbush decreases and interplanetary magnetic field disturbances.