KAGUYA的XRS出事了
中评社香港12月23日电/日本宇宙航空研究开发机构日前发布新闻公报说,尽管有两种仪器的性能未达到预期目标,但研究人员还是决定使绕月探测卫星“月亮女神”转入稳定观测模式。新闻公报说,“月亮女神”进入绕月观测轨道后,研究人员耗时两个月对卫星装备的14种观测仪器实施了初期的性能确认。除荧光X射线分光计和带电粒子频谱仪外,其他12种仪器全部达到设计目标。“月亮女神”接下来将进行长约10个月的稳定观测。
公报说,荧光X射线分光计原定使用1个CCD感光元件进行观测,但由于受到的干扰较大,暂时先使用1个CCD感光元件进行观测。带电粒子频谱仪目前面临的问题则是,电压控制回路温度升高可能导致检测粒子能力下降。日本研究人员正在努力解决这些问题。
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这香港话真的难懂,到底出了什么事情也没明白。
估计是制冷没达到要求,要不就是没考虑低能电子屏蔽。
XRS设计观测能力比嫦娥强400倍,要是最后输给嫦娥,呵呵,买块豆腐撞死算了。 呵呵,买块豆腐撞死算了^^^^^ http://www.jaxa.jp/press/2007/12/20071221_kaguya_e.html
XRS:
It may be difficult to use the 4 CCDs mode to meet performance expectation standards for normal operations because there are some high-level noises. A study to reduce the noise is ongoing. One CCD mode will be applied for normal operations to meet expected performance levels to detect target element distribution although the spatial resolution of 1 CCD mode is two times bigger than that of 4 CCDs mode.
CPS:
The CPS/ARD detected alpha rays emitted by the Rn on the lunar surface. The CPS/PS observed electron and proton around the moon. However, the CPS/PS could only observe heavy and light ion for several hours after it was turned on. This may be caused by thermal dependence of the regulators of single process sub-system. When the temperature of the regulator was low enough, heavy and light ion were detected by the CPS/PS. XRS共有4个CCD阵列,同时工作噪声异常,目前只能采取1 CCD工作模式,有效面积实际为25cm2。
狂龙按:貌似不是低能电子干扰,最可能是制冷系统故障或电子学串扰。
什么时候我国航天科学载荷的故障也可以在互联网公布,那将是我国科学精神的进步。
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