Satgen 7 Identity of Mystery Satellite ? 435.974 MHz
   
   Two of the trio of satellites qrming Oscar 13 on this frequency are now
providing reasonably accurate orbit data , allowing identification of one
of them.
   The 105 minute 89.56 deg orbiter is almost certainly the American Polar
Bear Experiment (86-88A) , engaged in Auroral zone communication tests. It
may transmit on several other frequencies.
   The 101 minute orbiters are now being switched off during the morning
and afternoon, but one of them is usually switched on again at about 1500
UTC . These satellites have not yet been identified but they may well have
nothing what so ever to do with the Polar Bear tests.
   Future Satgen bulletins will report experiments using the 105 minute
orbiter as a Polar Ionospheric probe.  73 de GM4IHJ 15 May 89.