merge - It appears there was never intended to be more than one Cryosat, so it does seem odd to have an article for the program as well as the satellite. It's like having an article for the Mars Reconnaissance Orbiter program, as well as an article for the Mars Reconnaissance Orbiter spacecraft. It makes more sense to put the program information in the satellite's article; the failed CryoSat-1 is linked in the "background" section, which seems sufficient.