From: "Pete Newman"
Subject: RE: Telescope Runaway inside Enclosure
Date: Sat, 6 Nov 2004 22:40:24 -0700
Dan wrote in http://www.astro.princeton.edu:81/sdss-25mlog/msg.2192.html:
>     On the evening of 5-Nov, a slew from stow to instrument change
> issued from the TCC resulted in telescope motion not requested.
...
>     Somehow the TCC lost control of the telescope without seeming to
> know it.
...
We've noticed other TCC oddities tonight and on recent nights, in
particular, IOP communications with the TCC hanging or failing to connect.
When this hit us tonight, we closed some IOP-TCC connections and all then
seemed well.  However, as we were off the sky later, we took the precaution
of issuing telstop then telrun commands on tcc25m.apo.nmsu.edu, as we also
suspected TCC confusion.  Note that the 3.5m observers routinely
telstop/telrun on tcc35m at the start of each night.
--Pete