alb@alice.UUCP (Adam L. Buchsbaum) (08/05/85)
One of four telescopes on the Instrument Pointing System, which had not been working all throughout the Challenger mission, came to life suddenly today, and ground controllers say they don't know why. However, the telescope, designed to measure the suns magnetic field and the only experiment of the 13 aboard that didn't function, is working perfectly now. Meanwhile, Challenger's crew fired the OMS engines today while ground- based observers studied the exhaust's effect on the ionosphere. Landing is now set for 1547 EDT, Tuesday.