[amsat-bb] Re: [sarex] Re: Re: ARISSat-1 and FOX social media fundraising
aa2tx at comcast.net
Thu Nov 18 13:48:18 PST 2010
The current plan is to use the same frequency for the FM downlink
and the telemetry beacon. The IHU will have sufficient memory capacity to
hold at least a days worth of data so the beacon would be turned on once
a day for a telemetry dump and then back to transponder mode.
And yes, we plan to use forward error correction on the beacon so
that it will be bulletproof. It will likely be a different format
than the one used on ARISSat-1 since we want a higher bit rate and Fox
will be passive magnetic stabilized (like AO-51) so it will not suffer
from tumble fading like ARISSat might and the interleave length does not
need to be as long.
Thanks for your interest!
At 03:35 PM 11/18/2010, Trevor . wrote:
>--- On Thu, 18/11/10, Andrew Glasbrenner <glasbrenner at mindspring.com> wrote:
> > Slides 14 through 17
>Really glad to see that AMSAT-NA is going ahead with the FOX project.
> >From my point of view potentially the valuable part of FOX is the
> deployable Solar Panels.
>This has never been done on a 1U CubeSat and should significantly
>increase the power available. A space proven system to deploy panels
>on a 1U sat will benefit not just AMSAT-NA for future projects but
>the entire CubeSat community.
>Unfortunately I wasn't able to get to the symposium so perhaps you
>could clarify one of the slides for me.
>Slide 16 mentions both a U/V FM transpoder and a V telemetry beacon.
>Is the telemetry beacon on a seperate frequency from the transponder
>so both can run at the same time ? Also is the beacon using the
>robust narrow band, high efficiently, BPSK system developed for ARISSat-1 ?
>I look forward to the launch of ARISSat-1 in the New Year with its
>first ever space deployment of a SDX linear transponder, with that
>and the Slow Scan TV, its sure to be very popular.
>73 Trevor M5AKA
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