Performance results from in-flight commissioning of the Juno Ultraviolet Spectrograph (Juno-UVS)
Performance results from in-flight commissioning of the Juno Ultraviolet Spectrograph (Juno-UVS)
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朱诺紫外光谱仪 (Juno-UVS) 飞行中调试的性能结果
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发表时间：
2013
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通讯作者：
J. Eterno
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作者：
T. Greathouse;G. Gladstone;M. Davis;D. Slater;M. Versteeg;K. Persson;B. Walther;G. Winters;S. Persyn;J. Eterno
我们介绍了朱诺紫外光谱仪 (Juno-UVS) 及其在 2011 年 12 月 5 日至 13 日期间进行的飞行调试以及 2012 年 10 月 10 日至 12 日期间首次定期维护的结果。Juno-UVS 是一款中等功率 (9.0 W) 的紫外光谱仪，基于目前在欧洲航天局罗塞塔航天器、美国宇航局新视野号航天器和NASA 月球勘测轨道飞行器上的 LAMP 仪器。然而，与其他 Alice 摄谱仪不同的是，Juno-UVS 搭载在自旋稳定的航天器上。 Juno-UVS 扫描镜允许狭缝指向距航天器旋转平面约 ±30° 的方向。这种能力使朱诺-UVS能够在任何给定的航天器方向上进入半个天空。主要任务的计划旋转速率为 2 rpm，每次旋转每个 0.2° 空间分辨率元件的积分时间仅为约 17 毫秒。因此，出于校准目的，从多次旋转中检索数据，然后重新映射和共同添加，以建立明亮恒星的曝光时间，以测量有效面积、空间分辨率、扫描镜指向位置等。朱诺-UVS的主要工作是表征木星的紫外线极光发射并将其与现场粒子测量联系起来。指向狭缝的能力将使操作更加灵活，使朱诺-UVS能够观察朱诺号飞过的磁场线的大气足迹，从而将航天器上的高能粒子测量与木星大气响应这些粒子而产生的远紫外线发射之间建立直接联系。
We present a description of the Juno ultraviolet spectrograph (Juno-UVS) and results from its in-flight commissioning performed between December 5th and 13th 2011 and its first periodic maintenance between October 10th and 12th 2012. Juno-UVS is a modest power (9.0 W) ultraviolet spectrograph based on the Alice instruments now in flight aboard the European Space Agency’s Rosetta spacecraft, NASA’s New Horizons spacecraft, and the LAMP instrument aboard NASA’s Lunar Reconnaissance Orbiter. However, unlike the other Alice spectrographs, Juno-UVS sits aboard a spin stabilized spacecraft. The Juno-UVS scan mirror allows for pointing of the slit approximately ±30° from the spacecraft spin plane. This ability gives Juno-UVS access to half the sky at any given spacecraft orientation. The planned 2 rpm spin rate for the primary mission results in integration times per 0.2° spatial resolution element per spin of only ~17 ms. Thus, for calibration purposes, data were retrieved from many spins and then remapped and co-added to build up exposure times on bright stars to measure the effective area, spatial resolution, scan mirror pointing positions, etc. The primary job of Juno-UVS will be to characterize Jupiter’s UV auroral emissions and relate them to in-situ particle measurements. The ability to point the slit will make operations more flexible, allowing Juno-UVS to observe the atmospheric footprints of magnetic field lines through which Juno flies, giving a direct connection between energetic particle measurements on the spacecraft and the far-ultraviolet emissions produced by Jupiter’s atmosphere in response to those particles.