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Planetary radio astronomy observations from Voyager-2 near Saturn

机译:土星附近旅行者2号的射电天文学观测

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摘要

Voyager-2 planetry radio astronomy measurements obtained near Saturn are discussed. They indicate that Saturnian kilometric radiation is emitted by a strong, dayside source at auroral latitudes in the northern hemisphere and by a weaker (by more than an order of magnitude) source at complementary latitudes in the southern hemisphere. These emissions are variable both due to Saturn's rotation and, on longer time scales, probably due to influences of the solar wind and the satellite Dione. The Saturn electrostatic discharge bursts first discovered by Voyager-1 and attributed to emissions from the B-ring were again observed with the same broadband spectral properties and a 10(h)11(m) + or - 5(m) episodic recurrence period but with an occurrence frequency of only of about 30 percent of that detected with Voyager-1. During the crossing of the ring plane at a distance of 2.88 R sub S, an intense noise event is interpreted to be consequence of the impact/vaporization/ionization of charged micron-size G-ring particles distributed over a total vertical thickness of about 1500 km.
机译:讨论了在土星附近获得的Voyager-2行星射电天文学测量结果。他们表明,土星的千米辐射是由北半球极光纬度的强日间辐射源和南半球互补纬度的较弱的辐射源(超过一个数量级)发出的。这些排放物不仅由于土星的自转而变化,而且在较长的时间尺度上也可能由于太阳风和卫星Dione的影响而变化。再次观察到Voyager-1首次发现并归因于B环发射的土星静电放电爆发,并具有相同的宽带频谱特性和10(h)11(m)+或-5(m)的周期性复发期,但其发生频率仅为Voyager-1侦测到的频率的30%。在环形平面以2.88 R sub S的距离相交期间,强烈的噪声事件被认为是分布在总垂直厚度约为1500的带电微米级G形环颗粒撞击/汽化/电离的结果公里

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