[amsat-bb] Re: AO-10 and AO-16
Alan P. Biddle
APBIDDLE at UNITED.NET
Fri Sep 7 13:25:25 PDT 2012
Still up there, and will be for years.
Early on, after the propulsion incident, there WAS a reluctance to command
certain functions for fear of making things worse. I recall some
discussions at an AMSAT Symposium, perhaps imperfectly, on the subject. For
instance, the solar panels were not deployed. They were working adequately
in the stowed position. If only one deployed, then you would have had an
unbalanced spacecraft, which would have made attitude control difficult to
impossible. Also, the damage to the wires was unknown, and a short might be
Post final failure, there were some amazing tests run, including the use of
a radio telescope which could hear the internal local oscillators responding
to commands. The nature of the failure was well understood. I doubt anyone
would be worried about making things worse, now. There is just little
probability that it will pull an AO-10.
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of w4upd
Sent: Friday, September 07, 2012 8:05 AM
To: amsat-bb at amsat.org
Subject: [amsat-bb] Re: AO-10 and AO-16
On a side note. Do we know the 'physical' status of AO-40? Is it still
orbiting the earth? I don't believe I heard anything about it re-entering.
I do remember a conversation here on the BB some time ago about making
an attempt to command AO-40 again to see if it will respond. However,
the command team stated they were reluctant to do so in the event it
might cause further harm to an already bad situation.
My comment would be that if this were the case what can we lose since
we've gone this long without having its access. I think that if there is
even a 1 percent chance of commanding it, it should be attempted since
we've nothing to lose. Again, I may be in left field and missed
something here, but I feel if there is a chance, it should be given a
shot. If things go wrong, we're not any worse off then we have been
without it being operational so long. Then again the command team may
have already made an attempt and my comments are mute.
On 9/7/2012 6:42 AM, Mark L. Hammond wrote:
> Hi Joe,
> Actually, I checked on AO-16 last Saturday. I didn't even get the
transmitter to come on, let alone stay on. It was a low pass, and I hope to
check again in the next few weeks. If you'll remember, the problem with
keeping the satellite ON is temperature related. If it gets lots of sun
(little eclipse), it will be warm enough to remain on. Otherwise, it
won't...and the orbit is such that it doesn't get enough sun--and it
probably won't for another 10 years or so. But I check periodically.
> About every week or two Drew KO4MA and I try to turn AO-51 back on. My
latest try was last Saturday. Nothing heard.
> IO-26 is still up there, and still humming; it needs to be turned on from
time to time, so I do that. But we haven't figured out how to run it in
voice like we did with AO-16; it doesn't appear possible.
> Don't know about AO-10; I haven't listened for a while. And I don't know
if it is expected to come on without commanding (which I cannot do).
> Mark N8MH
> At 10:28 PM 9/6/2012 -0500, Gary \"Joe\" Mayfield wrote:
>> Has anyone checked on AO-10 or AO-16 lately?
>> Joe kk0sd
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