The Magnetic Field of Saturn: Pioneer 11 Observations
The Magnetic Field of Saturn: Pioneer 11 Observations
复制标题
土星磁场：先锋 11 号观测
作者：
Mario H. Acu�a;N. Ness
高场磁通门磁力仪测量的土星内部磁场比预期的要弱得多。对初步数据的分析结合初步轨道产生了一个主行星场的模型，它是一个简单的中心偶极子，矩为0.20 - 0.01高斯-Rs 3 = 4.3 - 0.2 x 1028高斯-cm 3（1 Rs = 1土星半径= 60，000公里）。极性与地球相反，令人惊讶的是，倾斜度很小，在旋转轴的2分之1以内。云顶的赤道场强为0.2高斯，极地场强为0.56高斯。这颗独特的卫星泰坦预计将在大约50%的时间内位于土星的磁鞘或行星际介质内，因为太阳下点到磁层的平均距离估计为20 Rs，即到泰坦的轨道距离。
The intrinsic magnetic field of Saturn measured by the high-field fluxgate magnetometer is much weaker than expected. An analysis of preliminary data combined with the preliminary trajectory yield a model for the main planetary field which is a simple centered dipole of moment 0.20 � 0.01 gauss-Rs3 = 4.3 � 0.2 x 1028 gauss-cm3 (1 Rs = 1 Saturn radius = 60,000 km). The polarity is opposite that of Earth, and, surprisingly, the tilt is small, within 2� � 1� of the rotation axis. The equatorial field intensity at the cloud tops is 0.2 gauss, and the polar intensity is 0.56 gauss. The unique moon Titan is expected to be located within the magnetosheath of Saturn or the interplanetary medium about 50 percent of the time because the average subsolar point distance to the magnetosphere is estimated to be 20 Rs, the orbital distance to Titan.