Uplink Doppler Changes For FM Satellites
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
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. 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
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.
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
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
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@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@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.
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
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
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
CAS 7A has (or will have) an FM transponder in addition to the 3 linears ( 15/10;15/70; 2/70)Launch show 15 sep 2020. Not sure how they plan to schedule that, but it sounds like it'll be a fun bird.73Rick Tejera (K7TEJ)Saguaro Astronomy ClubWww.saguaroastro.orgThunderbird Astronomy ClubWww.w7tbc.org -------- Original message --------From: "Peter Goodhall (2M0SQL) via AMSAT-BB" amsat-bb@amsat.org Date: 5/13/20 12:11 (GMT-07:00) To: Tim Crawford tcarchcape@yahoo.com Cc: Amsat amsat-bb@amsat.org Subject: Re: [amsat-bb] Uplink Doppler Changes For FM Satellites Confused why you think Huskysat-1, DOSAAF-85 (RS-44), CAS-7A are FMsats they are all linear so please don't be putting any FM throughthem.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-91and AO-92 not sure why you wouldn't be there are so many chartsavailable just to transpose into the memory software.Peter, 2M0SQLOn Wed, 13 May 2020 at 19:52, Tim Crawford via AMSAT-BBamsat-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. 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_____________________________... via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum availableto all interested persons worldwide without requiring membership. Opinions expressedare 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
Rick, Thank you for that.... appreciate it tim
On Wednesday, May 13, 2020, 4:50:14 PM PDT, saguaroastro saguaroastro@cox.net wrote:
CAS 7A has (or will have) an FM transponder in addition to the 3 linears ( 15/10;15/70; 2/70) Launch show 15 sep 2020. Not sure how they plan to schedule that, but it sounds like it'll be a fun bird. 73Rick Tejera (K7TEJ)Saguaro Astronomy ClubWww.saguaroastro.orgThunderbird Astronomy ClubWww.w7tbc.org
-------- Original message --------From: "Peter Goodhall (2M0SQL) via AMSAT-BB" amsat-bb@amsat.org Date: 5/13/20 12:11 (GMT-07:00) To: Tim Crawford tcarchcape@yahoo.com Cc: Amsat amsat-bb@amsat.org Subject: Re: [amsat-bb] Uplink Doppler Changes For FM Satellites 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. 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
_______________________________________________ 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
participants (5)
-
Brian Wilkins KO4AQF -
John Brier -
Peter Goodhall (2M0SQL) -
saguaroastro -
Tim Crawford