[amsat-bb] AO-73 telemetry received via FO-29

Patrick STODDARD (WD9EWK/VA7EWK) amsat-bb at wd9ewk.net
Fri May 6 23:29:49 UTC 2016


Yes, there were hams talking through OSCARs 6 and 7 in the 1970s. I read
about that in preparing for a 2015 presentation I gave to a non-ham
crowd, talking about how hams have had a part in the Space Age. There
was also PCSAT-2 on the ISS being retransmitted by PCSAT (NO-44) in
2005 and 2006 and then copied by ground stations, as documented
by WB4APR at:


I couldn't tell from that page how many times ground stations were
retransmitted by both of those satellites, but that page shows how
one satellite was heard by the other, and then the retransmission
was heard on the ground.

Seeing Zach's explanation on how the calculations for Doppler were
made, dealing with two different satellites, was impressive!
Congratulations to Zach and his class, and also to Paul N8HM for
also copying the AO-73 telemetry through FO-29.


Twitter: @WD9EWK

On Fri, May 6, 2016 at 11:17 PM, Alan <wa4sca at gmail.com> wrote:

> Zach,
> Probably the first telemetry relay, but not quite the first relay.  I
> recall literally decades ago
> there was a relay, probably but not definitely from 70 cm to 2 m to 10 m.
> It might have included AO-7
> in its first incarnation.  Perhaps some of the really OTs might recall the
> details.  Still, a great
> achievement.  Especially calculating the hop to hop Doppler!
> 73s,
> Alan

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