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@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@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 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
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Sent via AMSAT-BB@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