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.