When I was in the Regulatory Affairs group at Orbcomm from 1996-2001, we had an issue with Prospero occasionally showing up in the Little LEO downlink band of 137-138 MHz.
I contacted some folks in Farnham who were involved with that satellite (launched from Woomera, Australia, if I'm not mistaken), and was able to collect some documentation on the satellite, long considered dead, and most of those involved retired.
The long and short of it was that the problem went away, everyone was pleased, and I had some interesting documents. It's been some time since that happened; I've moved on twice (first to Iridium Satellite and am now with the US Government), and all that's left of Propero is the backup satellite and Black Arrow rocket, both of which which sit in the Science Museum in London. I haven' a clue where the documentation I had is -- it may be in the boxes of material I donated a couple of years ago to the Historic Electronics Museum outside Baltimore. If I get a chance, I'll sift through the debris in my basement and see if they rise to the surface.
73, Eric W3DQ Washington, DC