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

PI计划继续运行位于华盛顿山（Po=1.24 GV）和达勒姆（Pc=1.41）的宇宙射线中子监测仪，并继续研究将这些基于地面的宇宙射线观测与IMP系列航天器的近地宇宙射线望远镜数据（E 70 MeV）以及先锋10号（8月在53AU处）获得的距地球较大日心距离的类似数据联系起来1991年)、旅行者1号（在45.7天文单位，纬度320度）和旅行者2号（在33天文单位）。利用这些数据，他们将研究以下内容：1)行星际宇宙射线的径向和纬度梯度；2)瞬时和时移积分e70mev径向梯度的比较；3)日球层终止边界的评价、位置及其对宇宙射线的影响；Forbush衰减与行星际磁场扰动的关系。

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.