Extreme Ultraviolet Radiation Measurement for Planetary Atmospheres/Magnetospheres from the Earth-Orbiting Spacecraft (Extreme Ultraviolet Spectroscope for Exospheric Dynamics: EXCEED)
Extreme Ultraviolet Radiation Measurement for Planetary Atmospheres/Magnetospheres from the Earth-Orbiting Spacecraft (Extreme Ultraviolet Spectroscope for Exospheric Dynamics: EXCEED)
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DOI：
10.1007/s11214-014-0077-z
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发表时间：
2014-10
影响因子：
10.3
通讯作者：
I. Yoshikawa;K. Yoshioka;G. Murakami;A. Yamazaki;F. Tsuchiya;M. Kagitani;T. Sakanoi;N. Terada;T. Kimura;M. Kuwabara;Kuto Fujiwara;T. Hamaguchi;H. Tadokoro
中科院分区：
文献类型：
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作者：
I. Yoshikawa;K. Yoshioka;G. Murakami;A. Yamazaki;F. Tsuchiya;M. Kagitani;T. Sakanoi;N. Terada;T. Kimura;M. Kuwabara;Kuto Fujiwara;T. Hamaguchi;H. Tadokoro
2013年9月，由埃帕里火箭发射了装有极紫外光谱仪（用于外层动力学的极紫外光谱仪：EXCEED）的Sprint-A卫星。现在它正绕着地球运行（954.05公里×1156.87公里的轨道;周期为104分钟），并且已经开始了广泛而多样的观测计划。极紫外光谱仪的有效面积超过1平方厘米，在太空中的灵敏度校准良好，它将从地球轨道上产生几个行星（水星、金星、火星、木星和土星）的大气层/磁层的光谱图像（520-1480 nm）。在观测的第一天，已经确定了来自木卫一等离子体环（主要是硫离子）和木星极光（H2莱曼和维尔纳带）的EUV辐射。计划对木卫一的等离子体环和极光进行连续3个月的测量，以见证在一个或两个区域发生的零星和突然的增亮事件。对于金星来说，尽管暴露时间很短（8分钟），但仍发现了CO的第四正（A1Π-X1Σ+）系统和一些已知的大气排放物。从4月到6月的长期曝光（大约2个月）将使金星电离层和尾部在EUV光谱范围内可视化。土星和火星是下一个目标。
The Sprint-A satellite with the EUV spectrometer (Extreme Ultraviolet Spectroscope for Exospheric Dynamics: EXCEED) was launched in September 2013 by the Epsilon rocket. Now it is orbiting around the Earth (954.05 km×1156.87 km orbit; the period is 104 minutes) and one has started a broad and varied observation program. With an effective area of more than 1 cm2and well-calibrated sensitivity in space, the EUV spectrometer will produce spectral images (520–1480 Å) of the atmospheres/magnetospheres of several planets (Mercury, Venus, Mars, Jupiter, and Saturn) from the Earth’s orbit. At the first day of the observation, EUV emissions from the Io plasma torus (mainly sulfur ions) and aurora (H2Lyman and Werner bands) of Jupiter have been identified. Continuous 3-month measurement for Io’s plasma torus and aurora is planned to witness the sporadic and sudden brightening events occurring on one or both regions. For Venus, the Fourth Positive (A1Π-X1Σ+) system of CO and some yet known emissions of the atmosphere were identified even though the exposure was short (8-min). Long-term exposure from April to June (for approximately 2 months) will visualize the Venusian ionosphere and tail in the EUV spectral range. Saturn and Mars are the next targets.