Linear Transponder Up and Down link frequency calculator
Hi Folks,
With the number of Linear Transponder Satellites that are operational or in the pipeline, I thought a simple program to convert uplink to downlink frequencies was worth writing. I’ve written one for Windows. You can find it here: https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0 I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches pending. Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC
Very nice Terry, but you forgot CAS-4a :-)
I work with pre-defined sat pairs to avoid Wifi spikes. Here are the results for some of the common birds using our downlink and your uplink (predicted) vs. what our uplinks really are for perfect audio.
CAS-4B 145.918 435.287 Actual: 435.285.900 XW-2A 145.672 435.043 : 435.042.600 XW-2B 145.733 435.107 : 435.106.800 XW-2C 145.798 435.167 : 435.166.800
Very solid agreement, tnx so much. It would have saved us a lot of time setting up the first time, had we had you nice program.
Please add CAS-4A when you get time.
73, N0AN
Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB < [email protected]> wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are operational or in the pipeline, I thought a simple program to convert uplink to downlink frequencies was worth writing. I’ve written one for Windows. You can find it here: https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0 I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches pending. Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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
Hi Hassan,
Just added CAS-4A to the list. I was working off the AMSAT-NA Laminated frequency chart (April 2018). Should have spotted it.
I have also tweaked the frequency on CAS-4B to track with your measurements. Use the same link for the updated program.
I’m tempted to add a few hundred Hertz to the conversion numbers to get them spot on but the error is probably less than the doppler correction required.
Trying to correct for doppler would require a built in tracking program and then you might as well use SatPC32.
73, Terry ZL2BAC
From: Hasan al-Basri Sent: Sunday, April 28, 2019 11:48 PM To: Wendy and Terry Osborne Cc: AMSAT-BB Subject: Re: [amsat-bb] Linear Transponder Up and Down link frequency calculator
Very nice Terry, but you forgot CAS-4a :-)
I work with pre-defined sat pairs to avoid Wifi spikes. Here are the results for some of the common birds using our downlink and your uplink (predicted) vs. what our uplinks really are for perfect audio.
CAS-4B 145.918 435.287 Actual: 435.285.900 XW-2A 145.672 435.043 : 435.042.600 XW-2B 145.733 435.107 : 435.106.800 XW-2C 145.798 435.167 : 435.166.800
Very solid agreement, tnx so much. It would have saved us a lot of time setting up the first time, had we had you nice program.
Please add CAS-4A when you get time.
73, N0AN
Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB [email protected] wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are operational or in the pipeline, I thought a simple program to convert uplink to downlink frequencies was worth writing. I’ve written one for Windows. You can find it here: https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0 I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches pending. Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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
Absolutelyl, no worries about doppler. The only one of concern was the 1200 Hz error and I think that was a typo. I'll look for the update. Tnx so much, it is a wonderful asset to sat ops. 73, N0AN Hasan
On Mon, Apr 29, 2019 at 11:56 PM Wendy and Terry Osborne < [email protected]> wrote:
Hi Hassan,
Just added CAS-4A to the list. I was working off the AMSAT-NA Laminated frequency chart (April 2018). Should have spotted it.
I have also tweaked the frequency on CAS-4B to track with your measurements. Use the same link for the updated program.
I’m tempted to add a few hundred Hertz to the conversion numbers to get them spot on but the error is probably less than the doppler correction required.
Trying to correct for doppler would require a built in tracking program and then you might as well use SatPC32.
73, Terry ZL2BAC
*From:* Hasan al-Basri [email protected] *Sent:* Sunday, April 28, 2019 11:48 PM *To:* Wendy and Terry Osborne [email protected] *Cc:* AMSAT-BB [email protected] *Subject:* Re: [amsat-bb] Linear Transponder Up and Down link frequency calculator
Very nice Terry, but you forgot CAS-4a :-)
I work with pre-defined sat pairs to avoid Wifi spikes. Here are the results for some of the common birds using our downlink and your uplink (predicted) vs. what our uplinks really are for perfect audio.
CAS-4B 145.918 435.287 Actual: 435.285.900 XW-2A 145.672 435.043 : 435.042.600 XW-2B 145.733 435.107 : 435.106.800 XW-2C 145.798 435.167 : 435.166.800
Very solid agreement, tnx so much. It would have saved us a lot of time setting up the first time, had we had you nice program.
Please add CAS-4A when you get time.
73, N0AN
Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB < [email protected]> wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are operational or in the pipeline, I thought a simple program to convert uplink to downlink frequencies was worth writing. I’ve written one for Windows. You can find it here: https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0 I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches pending. Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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
Am I missing something? Why not just put this info in a online worksheet/excel, rather than compile a program with no source code?
-Vinny KM2W
On Tue, Apr 30, 2019 at 7:01 AM Hasan al-Basri via AMSAT-BB < [email protected]> wrote:
Absolutelyl, no worries about doppler. The only one of concern was the 1200 Hz error and I think that was a typo. I'll look for the update. Tnx so much, it is a wonderful asset to sat ops. 73, N0AN Hasan
On Mon, Apr 29, 2019 at 11:56 PM Wendy and Terry Osborne < [email protected]> wrote:
Hi Hassan,
Just added CAS-4A to the list. I was working off the AMSAT-NA Laminated frequency chart (April 2018). Should have spotted it.
I have also tweaked the frequency on CAS-4B to track with your measurements. Use the same link for the updated program.
I’m tempted to add a few hundred Hertz to the conversion numbers to get them spot on but the error is probably less than the doppler correction required.
Trying to correct for doppler would require a built in tracking program and then you might as well use SatPC32.
73, Terry ZL2BAC
*From:* Hasan al-Basri [email protected] *Sent:* Sunday, April 28, 2019 11:48 PM *To:* Wendy and Terry Osborne [email protected] *Cc:* AMSAT-BB [email protected] *Subject:* Re: [amsat-bb] Linear Transponder Up and Down link frequency calculator
Very nice Terry, but you forgot CAS-4a :-)
I work with pre-defined sat pairs to avoid Wifi spikes. Here are the results for some of the common birds using our downlink and your uplink (predicted) vs. what our uplinks really are for perfect audio.
CAS-4B 145.918 435.287 Actual: 435.285.900 XW-2A 145.672 435.043 : 435.042.600 XW-2B 145.733 435.107 : 435.106.800 XW-2C 145.798 435.167 : 435.166.800
Very solid agreement, tnx so much. It would have saved us a lot of time setting up the first time, had we had you nice program.
Please add CAS-4A when you get time.
73, N0AN
Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB < [email protected]> wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are operational or in the pipeline, I thought a simple program to convert uplink to downlink frequencies was worth writing. I’ve written one for Windows. You can find it here:
https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0
I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches
pending.
Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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 [email protected]. 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
Perhaps I’m missing something, too. Why not use a full-featured tracking program, such as SatPC32, that has all of this already included?
On Tue, Apr 30, 2019 at 13:06 Vinny Stipo via AMSAT-BB [email protected] wrote:
Am I missing something? Why not just put this info in a online worksheet/excel, rather than compile a program with no source code?
-Vinny KM2W
On Tue, Apr 30, 2019 at 7:01 AM Hasan al-Basri via AMSAT-BB < [email protected]> wrote:
Absolutelyl, no worries about doppler. The only one of concern was the
1200
Hz error and I think that was a typo. I'll look for the update. Tnx so much, it is a wonderful asset to sat ops. 73, N0AN Hasan
On Mon, Apr 29, 2019 at 11:56 PM Wendy and Terry Osborne < [email protected]> wrote:
Hi Hassan,
Just added CAS-4A to the list. I was working off the AMSAT-NA Laminated frequency chart (April 2018). Should have spotted it.
I have also tweaked the frequency on CAS-4B to track with your measurements. Use the same link for the updated program.
I’m tempted to add a few hundred Hertz to the conversion numbers to get them spot on but the error is probably less than the doppler correction required.
Trying to correct for doppler would require a built in tracking program and then you might as well use SatPC32.
73, Terry ZL2BAC
*From:* Hasan al-Basri [email protected] *Sent:* Sunday, April 28, 2019 11:48 PM *To:* Wendy and Terry Osborne [email protected] *Cc:* AMSAT-BB [email protected] *Subject:* Re: [amsat-bb] Linear Transponder Up and Down link frequency calculator
Very nice Terry, but you forgot CAS-4a :-)
I work with pre-defined sat pairs to avoid Wifi spikes. Here are the results for some of the common birds using our downlink and your uplink (predicted) vs. what our uplinks really are for perfect audio.
CAS-4B 145.918 435.287 Actual: 435.285.900 XW-2A 145.672 435.043 : 435.042.600 XW-2B 145.733 435.107 : 435.106.800 XW-2C 145.798 435.167 : 435.166.800
Very solid agreement, tnx so much. It would have saved us a lot of
time
setting up the first time, had we had you nice program.
Please add CAS-4A when you get time.
73, N0AN
Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB < [email protected]> wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are operational
or
in the pipeline, I thought a simple program to convert uplink to downlink frequencies
was
worth writing. I’ve written one for Windows. You can find it here:
https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0
I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches
pending.
Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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 [email protected]. 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 [email protected]. 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
I haven't run it yet and am not on Windows currently so can't, but as to Vinny's question, it says it's a calculator so I assume it calculates frequencies with more precision not just every 5khz or something, right?
As for Mark's question, maybe you don't always need or want all the features of SatPC32.
Finally, maybe it is partly an effort by Terry to see if he could do it ;-)
After all, why don't we all just pick up the phone if we need to talk to someone who isn't within earshot?
Because we're hams!
With that said I think sharing the source code is almost always a good idea :-)
73, John Brier KG4AKV
On Tue, Apr 30, 2019 at 3:12 PM Mark D. Johns via AMSAT-BB < [email protected]> wrote:
Perhaps I’m missing something, too. Why not use a full-featured tracking program, such as SatPC32, that has all of this already included?
On Tue, Apr 30, 2019 at 13:06 Vinny Stipo via AMSAT-BB <[email protected]
wrote:
Am I missing something? Why not just put this info in a online worksheet/excel, rather than compile a program with no source code?
-Vinny KM2W
On Tue, Apr 30, 2019 at 7:01 AM Hasan al-Basri via AMSAT-BB < [email protected]> wrote:
Absolutelyl, no worries about doppler. The only one of concern was the
1200
Hz error and I think that was a typo. I'll look for the update. Tnx so much, it is a wonderful asset to sat ops. 73, N0AN Hasan
On Mon, Apr 29, 2019 at 11:56 PM Wendy and Terry Osborne < [email protected]> wrote:
Hi Hassan,
Just added CAS-4A to the list. I was working off the AMSAT-NA Laminated frequency chart (April
2018).
Should have spotted it.
I have also tweaked the frequency on CAS-4B to track with your measurements. Use the same link for the updated program.
I’m tempted to add a few hundred Hertz to the conversion numbers to
get
them spot on but the error is probably less than the doppler correction required.
Trying to correct for doppler would require a built in tracking
program
and then you might as well use SatPC32.
73, Terry ZL2BAC
*From:* Hasan al-Basri [email protected] *Sent:* Sunday, April 28, 2019 11:48 PM *To:* Wendy and Terry Osborne [email protected] *Cc:* AMSAT-BB [email protected] *Subject:* Re: [amsat-bb] Linear Transponder Up and Down link
frequency
calculator
Very nice Terry, but you forgot CAS-4a :-)
I work with pre-defined sat pairs to avoid Wifi spikes. Here are the results for some of the common birds using our downlink and your
uplink
(predicted) vs. what our uplinks really are for perfect audio.
CAS-4B 145.918 435.287 Actual: 435.285.900 XW-2A 145.672 435.043 : 435.042.600 XW-2B 145.733 435.107 : 435.106.800 XW-2C 145.798 435.167 : 435.166.800
Very solid agreement, tnx so much. It would have saved us a lot of
time
setting up the first time, had we had you nice program.
Please add CAS-4A when you get time.
73, N0AN
Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB
<
[email protected]> wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are
operational
or
in the pipeline, I thought a simple program to convert uplink to downlink frequencies
was
worth writing. I’ve written one for Windows. You can find it here:
https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0
I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches
pending.
Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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 [email protected]. 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 [email protected]. 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
--
Mark D. Johns KØJM / MØGZO / ex-9H3DJ / ex-KØMDJ Brooklyn Park, MN USA EN35hd
"Heaven goes by favor; if it went by merit, you would stay out and your dog would go in." ---Mark Twain _______________________________________________ Sent via [email protected]. 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
I think you’re both missing something. The developer created a tool to suit a particular purpose for them. Both of your approaches are like suggesting a multi-tool when all they need to do is cut a string with a pocket knife.
73, Mike Diehl W8LID/VE6LID
On Apr 30, 2019, at 14:58, Mark D. Johns via AMSAT-BB [email protected] wrote:
Perhaps I’m missing something, too. Why not use a full-featured tracking program, such as SatPC32, that has all of this already included?
On Tue, Apr 30, 2019 at 13:06 Vinny Stipo via AMSAT-BB [email protected] wrote:
Am I missing something? Why not just put this info in a online worksheet/excel, rather than compile a program with no source code?
-Vinny KM2W
On Tue, Apr 30, 2019 at 7:01 AM Hasan al-Basri via AMSAT-BB < [email protected]> wrote:
Absolutelyl, no worries about doppler. The only one of concern was the
1200
Hz error and I think that was a typo. I'll look for the update. Tnx so much, it is a wonderful asset to sat ops. 73, N0AN Hasan
On Mon, Apr 29, 2019 at 11:56 PM Wendy and Terry Osborne < [email protected]> wrote:
Hi Hassan,
Just added CAS-4A to the list. I was working off the AMSAT-NA Laminated frequency chart (April 2018). Should have spotted it.
I have also tweaked the frequency on CAS-4B to track with your measurements. Use the same link for the updated program.
I’m tempted to add a few hundred Hertz to the conversion numbers to get them spot on but the error is probably less than the doppler correction required.
Trying to correct for doppler would require a built in tracking program and then you might as well use SatPC32.
73, Terry ZL2BAC
*From:* Hasan al-Basri [email protected] *Sent:* Sunday, April 28, 2019 11:48 PM *To:* Wendy and Terry Osborne [email protected] *Cc:* AMSAT-BB [email protected] *Subject:* Re: [amsat-bb] Linear Transponder Up and Down link frequency calculator
Very nice Terry, but you forgot CAS-4a :-)
I work with pre-defined sat pairs to avoid Wifi spikes. Here are the results for some of the common birds using our downlink and your uplink (predicted) vs. what our uplinks really are for perfect audio.
CAS-4B 145.918 435.287 Actual: 435.285.900 XW-2A 145.672 435.043 : 435.042.600 XW-2B 145.733 435.107 : 435.106.800 XW-2C 145.798 435.167 : 435.166.800
Very solid agreement, tnx so much. It would have saved us a lot of
time
setting up the first time, had we had you nice program.
Please add CAS-4A when you get time.
73, N0AN
Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB < [email protected]> wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are operational
or
in the pipeline, I thought a simple program to convert uplink to downlink frequencies
was
worth writing. I’ve written one for Windows. You can find it here:
https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0
I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches
pending.
Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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 [email protected]. 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 [email protected]. 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
--
Mark D. Johns KØJM / MØGZO / ex-9H3DJ / ex-KØMDJ Brooklyn Park, MN USA EN35hd
"Heaven goes by favor; if it went by merit, you would stay out and your dog would go in." ---Mark Twain _______________________________________________ Sent via [email protected]. 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
Hi,
The idea was to create a simple tool that is an electronic version of the laminated frequency guide that you get with AMSAT membership. I initially thought of using Excel but quickly concluded it was easier to write it in MS Visual Basic Express 2008. I have put the source code into the dropbox folder so people can look at it if they wish. You will need a version of VB.net to make sense of it.
73, Terry Osborne ZL2BAC
-----Original Message----- From: Mike Diehl via AMSAT-BB Sent: Wednesday, May 01, 2019 2:19 PM To: [email protected] ; Mark D. Johns Cc: AMSAT-BB Subject: Re: [amsat-bb] Linear Transponder Up and Down link frequencycalculator
I think you’re both missing something. The developer created a tool to suit a particular purpose for them. Both of your approaches are like suggesting a multi-tool when all they need to do is cut a string with a pocket knife.
73, Mike Diehl W8LID/VE6LID
On Apr 30, 2019, at 14:58, Mark D. Johns via AMSAT-BB [email protected] wrote:
Perhaps I’m missing something, too. Why not use a full-featured tracking program, such as SatPC32, that has all of this already included?
On Tue, Apr 30, 2019 at 13:06 Vinny Stipo via AMSAT-BB [email protected] wrote:
Am I missing something? Why not just put this info in a online worksheet/excel, rather than compile a program with no source code?
-Vinny KM2W
On Tue, Apr 30, 2019 at 7:01 AM Hasan al-Basri via AMSAT-BB < [email protected]> wrote:
Absolutelyl, no worries about doppler. The only one of concern was the
1200
Hz error and I think that was a typo. I'll look for the update. Tnx so much, it is a wonderful asset to sat ops. 73, N0AN Hasan
On Mon, Apr 29, 2019 at 11:56 PM Wendy and Terry Osborne < [email protected]> wrote:
Hi Hassan,
Just added CAS-4A to the list. I was working off the AMSAT-NA Laminated frequency chart (April 2018). Should have spotted it.
I have also tweaked the frequency on CAS-4B to track with your measurements. Use the same link for the updated program.
I’m tempted to add a few hundred Hertz to the conversion numbers to get them spot on but the error is probably less than the doppler correction required.
Trying to correct for doppler would require a built in tracking program and then you might as well use SatPC32.
73, Terry ZL2BAC
*From:* Hasan al-Basri [email protected] *Sent:* Sunday, April 28, 2019 11:48 PM *To:* Wendy and Terry Osborne [email protected] *Cc:* AMSAT-BB [email protected] *Subject:* Re: [amsat-bb] Linear Transponder Up and Down link frequency calculator
Very nice Terry, but you forgot CAS-4a :-)
I work with pre-defined sat pairs to avoid Wifi spikes. Here are the results for some of the common birds using our downlink and your uplink (predicted) vs. what our uplinks really are for perfect audio.
CAS-4B 145.918 435.287 Actual: 435.285.900 XW-2A 145.672 435.043 : 435.042.600 XW-2B 145.733 435.107 : 435.106.800 XW-2C 145.798 435.167 : 435.166.800
Very solid agreement, tnx so much. It would have saved us a lot of
time
setting up the first time, had we had you nice program.
Please add CAS-4A when you get time.
73, N0AN
Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB < [email protected]> wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are operational
or
in the pipeline, I thought a simple program to convert uplink to downlink frequencies
was
worth writing. I’ve written one for Windows. You can find it here:
https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0
I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches
pending.
Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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:
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Sent via [email protected]. 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 [email protected]. 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
--
Mark D. Johns KØJM / MØGZO / ex-9H3DJ / ex-KØMDJ Brooklyn Park, MN USA EN35hd
"Heaven goes by favor; if it went by merit, you would stay out and your dog would go in." ---Mark Twain _______________________________________________ Sent via [email protected]. 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 [email protected]. 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
Two other points. There is a 1200 Hz error on CAS-4A....a few hundred Hz is predictable, but I think an additional 1000 Hz may have crept in there, so check your calcs.
Notice all others are no more than a few hundred Hz...which is as it should be.
The reference freq are for USB, perfect voice tone and fully doppler corrected. The Rx are FunCube Pro+ SDRs, that have been calibrated to within 0.356 Hz @ 10 MHz and checked against 6 meters to be accurate within 3 Hz. (Compared to GPS Discipline Oscillator)
73, N0AN Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB < [email protected]> wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are operational or in the pipeline, I thought a simple program to convert uplink to downlink frequencies was worth writing. I’ve written one for Windows. You can find it here: https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0 I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches pending. Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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 error is in CAS-4B, 4A is missing...too many things going on here, sorry about that. 73, N0AN Hasan
On Sun, Apr 28, 2019 at 7:00 AM Hasan al-Basri [email protected] wrote:
Two other points. There is a 1200 Hz error on CAS-4A....a few hundred Hz is predictable, but I think an additional 1000 Hz may have crept in there, so check your calcs.
Notice all others are no more than a few hundred Hz...which is as it should be.
The reference freq are for USB, perfect voice tone and fully doppler corrected. The Rx are FunCube Pro+ SDRs, that have been calibrated to within 0.356 Hz @ 10 MHz and checked against 6 meters to be accurate within 3 Hz. (Compared to GPS Discipline Oscillator)
73, N0AN Hasan
On Sat, Apr 27, 2019 at 8:41 PM Wendy and Terry Osborne via AMSAT-BB < [email protected]> wrote:
Hi Folks,
With the number of Linear Transponder Satellites that are operational or in the pipeline, I thought a simple program to convert uplink to downlink frequencies was worth writing. I’ve written one for Windows. You can find it here: https://www.dropbox.com/sh/4o375h6bygjxkzr/AABi9Ck9Wc6ODrhXwIVHxI-_a?dl=0 I’ve put the exe file and the same file in zip format. I have put all the current birds plus the ones that have launches pending. Just select the satellite of interest from the “Satellite” drop down menu, put your frequency into the text box and hit the Up or Dn calculate button.
Let me know if you think this is useful.
73, Terry Osborne ZL2BAC _______________________________________________ Sent via [email protected]. 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 (6)
-
Hasan al-Basri -
John Brier -
Mark D. Johns -
Mike Diehl -
Vinny Stipo -
Wendy and Terry Osborne