Complex sentence: The two other instruments, XIS and HXD, were unaffected by the malfunction, and there are plans to integrate another XRS into the proposed NeXT X-ray observation satellite planned for launch in 2012.
Split into simpler sentences: The two other instruments, XIS and HXD, are unaffected by this malfunction. It is planned to integrate the XRS into the proposed NeXT X-ray observation satellite planned for launch in 2012.