[amsat-bb] A test question!

[Bob]

Lincoln Calibration Spheres were launched in the 60s and are still used
today to calibrate ground radar systems.  But they are entirely passive
(think very expensive hollow metal spheres).

GEOS-3 launched four years after AO-7, and lead a very active RF life up
until was decommissioned in 2016.  It is still in orbit and people use it
as a test for laser ranging devices -- again passive, and not as old anyway.

I believe that AO-7 is indeed the oldest satellite that has an active RF
purpose.

73, Bob, WB4SON

On Wed, Jul 3, 2019 at 11:56 AM Mike Seguin via AMSAT-BB <amsat-bb at amsat.org>
wrote:

> Hi Graham,
>
> If you like, you could mention that AO-7 was commanded successfully for
> the first time after it returned on July 11, 2002. The Command sent was
> to change the speed of the CW beacon. It worked!!
>
> Mike, N1JEZ
>
> On 7/3/2019 10:52 AM, Graham Shirville via AMSAT-BB wrote:
> > Hi All,
> >
> > I am preparing for a satellite talk and QO100 demo this Monday 8th July
> > at the Milton Keynes Amateur Radio Society!
> >
> > I have a slide that shows Oscar 7 as having been launched in 1974 and I
> > am tempted to state that it is the oldest satellite in earth orbit that
> > is still functioning! (not just the oldest Oscar) Would I be correct?
> >
> > I will, of course, explain about how it was "out of service" for some
> > years in the intervening 45.
> >
> > many thanks
> >
> > Graham G3VZV
> >
> > _______________________________________________
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> --
>
> 73,
> Mike, N1JEZ
> "A closed mouth gathers no feet"
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>