[amsat-bb] Uplink Doppler Changes For FM Satellites

[Brian Wilkins KO4AQF]

John

I use KE0PBR’s frequency cheat sheet. Hope it helps others as well and
clears things up for you

https://ke0pbr.wordpress.com/2018/12/31/my-frequency-cheat-sheet/


On Wed, May 13, 2020 at 3:22 PM John Brier via AMSAT-BB <amsat-bb at amsat.org>
wrote:

> The AFC was discussed in the past.
>
> Best point made IMHO that you should compensate for Doppler is that if a
> lot of people are uplinking, the receiver at bird is going to be more
> likely to receive properly compensated signals.
>
> 73, John Brier KG4AKV
>
> On Wed, May 13, 2020, 15:13 Peter Goodhall (2M0SQL) via AMSAT-BB <
> amsat-bb at amsat.org> wrote:
>
> > Confused why you think Huskysat-1, DOSAAF-85 (RS-44), CAS-7A  are FM
> > sats they are all linear so please don't be putting any FM through
> > them.
> >
> > Current FM fleet is AO-91, AO-92, SO-50, Lilacsat-2 and PO-101 nothing
> > else.
> >
> > You still need to put Doppler correction into the memories on AO-91
> > and AO-92 not sure why you wouldn't be there are so many charts
> > available just to transpose into the memory software.
> >
> > Peter, 2M0SQL
> >
> > On Wed, 13 May 2020 at 19:52, Tim Crawford via AMSAT-BB
> > <amsat-bb at amsat.org> wrote:
> > >
> > > Uplink Doppler Changes For FM Satellites Question.  I am updating my HH
> > Freq currently.
> > >
> > > As I under stand it, the Fox Satellites (AO-91 & 92) receiver have AFC
> > (automatic Frequency Control) which means that no doppler change in the
> > transmit frequency is required nor should it be put into effect.
> > > My question is does anyone know whether or not any of the following FM
> > Satellites also have AFC for their receivers?
> > >
> > > PO-101 (Diwata)CAS-3H (LilacSat-2)Huskysat-1DOSAAF-85 (RS-44)CAS-7A
> (not
> > launched  yet)
> > > Thank you for your assistance.
> > > 73
> > > Tim CrawfordKE7TAC
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> _______________________________________________
> 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.
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-- 
Brian Wilkins
KO4AQF