[amsat-bb] Re: Delfi-C3 status update 7 May 12:00 UTC

Bill Ress bill at hsmicrowave.com
Wed May 7 09:22:00 PDT 2008


Thanks to all your team, along with Bram who kindly replies to my signal 
reports, for keeping us well informed. Your being open about the status 
is indeed a very welcome change.

Please keep up the good work and I'm confident you'll sort out the 
issues with Delfi-C3.

Regards...Bill - N6GHz

Wouter Jan Ubbels wrote:
> Hi all,
> another status update of the Delfi-C3 satellite:
> 1. Delfi-C3 is now in orbit for over a week, and continues to perform well.
> 2. We are aware of the transmitter distortion and drop outs occurring. These
> two are related, and are not related to the transmitter itself, but are the
> result of a power / attitude issue combined with the way our Electrical
> Power System works. Thanks to all your reports we now have a clear view of
> what is happening, and are in the process of taking corrective actions while
> the s/c is over our groundstation. We are taking these actions step by step
> so the phenomenon will continue to occur over the coming days. Your reports
> on this phenomenon are welcome.
> 3. We are still not sure which TLE's correspond to Delfi-C3, so it is indeed
> kind of like a lottery hi:) Time will tell, since the s/c will drift further
> apart over time, so that we can discriminate better between the individual
> satellites. During the last days, our groundstation has been using object
> #32789 with good results.
> 4. There have been a number of orbits where the spacecraft entered
> "emergency mode". Up till now, every eclipse (reset) has cleared these
> issues. We think we have an understanding of what causes this. If you hear
> the satellite in emergency mode, your reports are appreciated, either on the
> BB or at missioncontrol at delfic3.nl
> 5. Today we tried listening to the satellite using handheld receivers and
> Arrow antennas, on the groundstation roof. Delfi-C3 was nice and strong
> during this overhead pass, we had a tremendous amount of fun as you can see
> from the photos at
> http://www.delfic3.nl/photoblog/
> It was a magnificent feeling to be staring into the blue sky knowing that
> our spacecraft was somewhere up high.
> 6. Up till now we have received 70000+ AX.25 telemetry frames from the
> satellite on our servers, thank you all for listening and submitting
> telemetry!
> 73 on behalf of the Delfi-C3 team,
> Wouter Jan Ubbels PE4WJ
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