Planetary radio astronomy experiment for Voyager missions
Planetary radio astronomy experiment for Voyager missions
复制标题
航行者号任务的行星射电天文学实验
DOI：
10.1007/bf00211544
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发表时间：
1977
影响因子：
10.3
通讯作者：
A. Riddle
中科院分区：
文献类型：
--
作者：
J. Warwick;J. B. Pearce;R. Peltzer;A. Riddle
行星射电天文学实验将测量1.2 kHz至40.5 MHz范围内行星辐射的射电频谱。这些辐射来自行星磁层和电离层中的波-粒子-等离子体相互作用。在木星，它们受到伽利略卫星木卫一的强烈调制。当航天器离开地球附近时，我们将观测到地面千米辐射，并首次确定其偏振（分别为RH和LH功率）。在巨行星上，低频无线电发射的来源尚不清楚，但将通过将无线电发射数据与旅行者号上的其他粒子和场实验以及光学数据进行比较来确定。由于木星的射电数据很可能与粒子沉降、极区电离层的磁场强度和方向有关，我们希望能够阐明木星极光的某些特征。结合等离子体波实验和可能的几个光学实验，我们的数据可以证明巨行星和卫星泰坦上闪电的存在，如果它存在。最后，旅行者任务发生在太阳黑子周期的最大值附近。太阳爆发类型可以通过无线电测量确定;当航天器位于太阳与地球相对的一侧时，我们可以确定与太阳耀斑有关的事件，否则在地球上是看不到的。
The planetary radio astronomy experiment will measure radio spectra of planetary emissions in the range 1.2 kHz to 40.5 MHz. These emissions result from wave-particle-plasma interactions in the magnetospheres and ionospheres of the planets. At Jupiter, they are strongly modulated by the Galilean satellite Io.As the spacecraft leave the Earth's vicinity, we will observe terrestrial kilometric radiation, and for the first time, determine its polarization (RH and LH power separately). At the giant planets, the source of radio emission at low frequencies is not understood, but will be defined through comparison of the radio emission data with other particles and fields experiments aboard Voyager, as well as with optical data. Since, for Jupiter, as for the Earth, the radio data quite probably relate to particle precipitation, and to magnetic field strength and orientation in the polar ionosphere, we hope to be able to elucidate some characteristics of Jupiter auroras.Together with the plasma wave experiment, and possibly several optical experiments, our data can demonstrate the existence of lightning on the giant planets and on the satellite Titan, should it exist. Finally, the Voyager missions occur near maximum of the sunspot cycle. Solar outburst types can be identified through the radio measurements; when the spacecraft are on the opposite side of the Sun from the Earth we can identify solar flare-related events otherwise invisible on the Earth.