FM4/Chief, Mathematical Physics BranchFEB 5 196868-FM-T-19FM/Deputy ChiefSundisk W-matrix is a little weird.
During our Sundisk Pre-CARR meeting at MIT on January 25, Jerry Levine gave us a one hour briefing on some idiosyncrasies in the handling of the W-matrix during the navigation programs. Generally speaking, they involved the manner in which it is propagated with time. I do not think the way we have the mission set up they should bother us, but I urge that you have Bob Bavely or someone become thoroughly familiar with this situation and make sure we are doing right. Incidentally, it is possible to change the initial values of the matrix since they are in erasable, in case you didn't know.