Ulysses奥德赛
Launched in October1990, Ulysses will explore the Sun's polar regions. It has an orbit which swings far from the ecliptic plane, giving it a unique vantage point from which to study the sun. It measures radio frequency emissions produced by energetic electrons ejected by the sun. These electrons follow the magnetic field lines from the sun, and their interactions with the plasma of the solar wind generate radio emissions called Type III radio bursts. 1990年10月发射的乌列斯斯号探测器将探索太阳的极地区域。它的轨道使其远离黄道平面，从而提供了独特的视角，用于研究太阳。它测量由太阳发射的高能电子产生的无线电频率发射。这些电子沿着磁场线从太阳出发，它们与日球层风中的等离子体相互作用，产生称为Type III无线电爆发的无线电发射。
Ulysses used a gravity-assist maneuver with Jupiter to rotate its orbital plane far out of the ecliptic, becoming the first spacecraft to go to high ecliptic latitudes (max 80¡) and over the poles of the sun. To monitor radio emissions, it has a 72.5 meter long dipole antenna and a sensitive receiver with 76 discrete frequency channels between 1 and 940 kHz. The radio bursts further from the sun have lower characteristic frequencies, so the multiband detector can map the bursts at different distances to picture the sun's magnetic field. 乌卢西斯利用木星的重力助推 maneuver 将其轨道平面旋转出黄道面，成为首个到达高黄道纬度（最大80°）并越过太阳极点的航天器。为监测无线电发射，它配备了一根72.5米长的偶极天线和一个灵敏接收器，该接收器可在1至940 kHz之间提供76个离散的频率通道。远离太阳的无线电爆发具有较低的特征频率，因此多频带探测器可以对不同距离的爆发进行成像，以绘制太阳的磁场。
The electrons from the sun travel at speeds in the range 0.1 to 0.3c so that they sweep out to the radius of the earth's orbit in about 30 minutes. This allows mapping of a magnetic field line in a short time to get a near-instantaneous plot of the sun's magnetic field. The field lines were found to be a spiral form, as had been predicted as a result of the outward solar wind and the rotation of the sun. The form is called an archimedean spiral. 来自太阳的电子以0.1到0.3倍光速旅行，因此在约30分钟内扫过地球轨道半径。这使得可以在短时间内绘制磁场线，从而获得太阳磁场的近实时图像。这些磁场线被发现呈螺旋形，这与向外的太阳风和太阳自转所预测的结果一致。这种形式称为阿基米德螺旋。
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Index Solar System Illustration Solar System Concepts Solar System Exploration Reference Reiner, et al., Science 1995 索引 太阳系图示 太阳系概念 太阳系探索 参考 Reiner 等，科学 1995 | ||
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Sun's Magnetic Field from Ulysses从乌利塞斯观测的太阳磁场
The electrons from the sun travel at speeds in the range 0.1 to 0.3c so that they sweep out to the radius of the earth's orbit in about 30 minutes. This allows mapping of a magnetic field line in a short time to get a near-instantaneous plot of the sun's magnetic field. The field lines were found to be a spiral form, as had been predicted as a result of the outward solar wind and the rotation of the sun. The form is called an archimedean spiral. 来自太阳的电子以0.1到0.3倍光速旅行，因此在约30分钟内扫过地球轨道半径。这使得可以在短时间内绘制磁场线，从而获得太阳磁场的近实时图像。这些磁场线被发现呈螺旋形，这与向外的太阳风和太阳自转所预测的结果一致。这种形式称为阿基米德螺旋。
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Index Solar System Illustration Solar System Concepts Solar System Exploration Reference Reiner, et al., Science 1995 索引 太阳系图示 太阳系概念 太阳系探索 参考 Reiner 等，科学 1995 | ||
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Go Back
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