Re: [amsat-bb] OSCAR-11 Report

["Jeff Griffin" <kb2m@xxxxxxxxxxx>]

 Credit where credit is due.  I might of captured and mailed the first 
complete telemetry file to Clive, but  I didn't hear it first. Mark,KU7Z 
deserves the credit. Thanks Mark....


73 Jeff kb2m



----- Original Message ----- 
From: "Clive Wallis" <clivew@zetnet.co.uk>
To: <amsat-bb@amsat.org>
Sent: Monday, August 15, 2005 11:34 AM
Subject: [amsat-bb] OSCAR-11 Report


>                  OSCAR-11 REPORT
>
>                   15 August 2005
>
> OSCAR-11 is back! I received the good news, on Saturday morning, while at
> the AMSAT-UK Colloquium.  This was entirely unexpected!  On Sunday morning
> Bob G4VRC played me a recording of an early morning pass received that 
> day.
>
> During the period 21 July to 14 August 2005 consistent signals have been
> heard from 30 July to 08 August. Signals seem to be weaker than usual,
> confirmed by the many reports received. However,since I last heard the
> satellite on 30 April, I've reinstalled my antennas , which makes
> comparisons difficult.
>
> Many thanks for all the recent reports of OSCAR-11 including those
> from KB2M (who heard it first), VK6XH, KU7Z, HK7MKE, KA2UPW, JE9PEL,
> G1OCN, HB9SKA and G8OQM.
>
> All the analogue telemetry channels, 0 to 59 are zero, ie they have
> failed.  The status channels 60 to 67 are still working. One bit in
> channel 62, DSR mode, has changed from WRITE to READ.  DSR is the Digital
> Store & Readout experiment. This could be significant if the experiment
> is still drawing current, but the other status bit indicates that it is
> switched OFF.
>
> The on-board clock is now showing a very large error.  It has lost
> approximately 19 days since 30 April.  During the recent data collection
> period, the clock error has been changing at a decreasing rate.  The size
> of the clock error and the rate at which it is changing is similar to the
> duration of the solar eclipse periods. This suggests that the clock might
> have been switching OFF during eclipses.
>
> The eclipses have now ended, and the satellite should be in continuous
> sunlight for the remainder of this year, and well into next year.  This
> should help the satellite to continue transmitting, although continuous
> sunlight can cause problems due to excessive temperatures.
>
> If the watchdog timer is still operating on a 20 day cycle, ie.
> approximately ten days ON followed by 10 days OFF, then the VHF beacon
> should resume transmissions around 18 August.
>
> The Beacon frequencies are -
>
> VHF 145.826 MHz.  AFSK FM  ASCII Telemetry
>
> UHF 435.025 MHz.  OFF
>
> S-band 2401.5 MHz. OFF
>
> Listeners to OSCAR-11 may be interested in visiting my website which
> contains an archive of news & telemetry data. It also contains details
> about using a soundcard or hardware demodulators for data capture.  There
> is software for capturing data, and decoding ASCII telemetry.  The URL is
> www.users.zetnet.co.uk/clivew/
>
> If you place this bulletin on a terrestrial packet network, please
> use the bulletin identifier $BID:U2RPT112.CWV, to prevent duplication.
>
> 73 Clive G3CWV   g3cwv@amsat.org
> ----
----
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