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Re: UO-36



UO-36 has not been on over the USA since the 16th.

Duane Naugle wrote:
> 
> Gentlemen,
> 
> Below are a few of Chris Jackson, G7UPN's recent postings.
> 
> If you are not running WiSP MSPE 2.00L you probably will not hear UO-36
> unless someone else is and turns on the downlink. Please note you will
> have to access your computer's registry to enable the software to turn
> on the downlink. I have not done this myself, but I understand it works.
> 
> I apologize for not including the dates of these messages. They were
> posted at the end of March and beginning of April.
> 
> 73,
> Duane Naugle, KO6BT
> ko6bt@amsat.org
> __________________________________________________________________________
> 
> Due to the low power budget on UO-36 the satellite downlink is normally OFF.
> 
> I will release a new version of MSPE that has the ability to switch the
> downlink on during the pass (hopefully later today).
> 
> 73,
> Chris G7UPN
> 
> UO-36 has a lot of systems, and all these consume power.  It has advanced
> attitude and orbit control, a number of flight computers, and other systems
> that can't realistically be turned off.  These consume a certain amount of
> power and we can't change that.  The orbit UO-36 is in provides variable
> power (from between ~50w OAP to >150W OAP).  When we are in the low power
> season, we don't have much power to go around.
> 
> Power isn't cheap in space.  Solar arrays are EXTREMELY expensive.  We
> therefore have a couple of options - leave 1/2 the spacecraft on the ground,
> or live with the fact that some payloads only operate for certain times.
> The later is standard practice on many missions (not just amateur).  Payload
> operating times are modulated by available to ensure that the power budget
> is maintained.
> 
> In the case of UO-36, I have chosen to let the satellite decide when it has
> enough power, rather than simply switching the downlink off for long
> periods.  The groundstation will send a request to switch on the downlink,
> and if there is power available, this will be actioned.  If during the
> operation the power level drops below preset levels, the satellite will
> reduce consumption by switching systems off.
> 
> I hope this helps explain things...
> 
> Cheers
> Chris G7UPN / ZL2TPO
> UoSAT command station
> 
> The downlink frequency is 437.400MHz, uplink is 145.96MHz.  Broadcast
> callsign is UO121-11.
> 
> Chris G7UPN
> 
> -----Original Message-----
> From: Alan K. Adamson [mailto:ne1h@ne1h.dyndns.org]
> Sent: Thursday, June 22, 2000 11:48 AM
> To: PAT McGRATH; amsat-bb@AMSAT.Org
> Subject: RE: [amsat-bb] UO-36
> 
> Just as a point of reference, I have not copied anything off UO-36
> (UOSAT-12) in since I got my tower up about 10 days ago.  Maybe if Chris is
> watching he can tell us the status?
> 
> Alan
> 
> -----Original Message-----
> From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> Behalf Of PAT McGRATH
> Sent: Thursday, June 22, 2000 1:33 PM
> To: amsat-bb@AMSAT.Org
> Subject: Re: [amsat-bb] UO-36
> 
> Is anyone in Sothern California heard UO-36 recently?
> 
> Is this satellite on low power?
> 
> I have not been able to hear it for at least two weeks.
> 
> >
> > UO-36 is alive and well transmitting with UO-121-11 & 12, just watched my
> > downing several files whilst Surrey was downloading one large 256K file.
> >
> > Hope that helps
> >
> > Chris
> > GW6KZZ
> >
> > In a message dated 20/06/00 23:50:41 Greenwich Standard Time,
> > Duane.Naugle@mitchell.com writes:
> >
> > > FYI,
> > >
> > >  Actually Chris Jackson posted UO121-11 as the broadcast and UO121-12
> > >  as the BBS callsign back in December and again in April. However
> > >  UO-36 (UoSat-12) has 3 OBC's (On Board Computers?) so don't be
> surprised
> > >  if at some point in it's lifetime you see UO120-11 & 12 or UO122-11 &
> 12.
> > >
> > >  You might want to monitor your station as it flies over to check which
> > >  one is currently active.
> > >
> > >  Duane
> > >  ko6bt@amsat.org
> >
> >
> > Chris J. Dixon
> > MILT MInstTA MISM
> > GW6KZZ
> > Member of AMSAT-UK & RSGB
> > Cdixon6901@aol.com
> > South Wales, UK.
> >
> > My own web page: http://members.aol.com/cdixon6901/
> > ----
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> >
> 
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-- 
73, Roy

Internet: w0sl@amsat.org
Home Page: http://home.swbell.net/rdwelch
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