How Do I Connect SDR++ to Gpredict? #1244
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if you still need to know how to make the two work together I will sent you a link on how to make it work . |
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Did you find the relevant link? |
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https://www.youtube.com/watch?v=AghjgwTw-Vk
In sdr++
Open the tick Rigctlr Server
You will see the info you need to set Gpredict settings
Let me know if you need more help.
…On Wed, Jan 10, 2024 at 10:55 AM Alex Landherr ***@***.***> wrote:
Did you find the relevant link?
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What should I set the audio record options to in SDR++? The Doppler corrections are coming through now. |
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Is there any way to make Gpredict remember the downlink frequency for each satellite when sending tracking/doppler commands to SDR++ so I don't have to enter it under "Radio Control" each time? E.g. each time I or Gpredict switch satellite the frequency in SDR++ should also jump to the corresponding one for NOAA 15, 18 and 19. |
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When you open Gpredict You will see your chosen (Favorites) Sats.
Those will be the Sat. you will see in Radio Control in the Tic down error.
…On Wed, Jan 10, 2024 at 12:18 PM Alex Landherr ***@***.***> wrote:
Is there any way to make Gpredict remember the downlink frequency for each
satellite when sending tracking/doppler commands to SDR++ so I don't have
to enter it under "Radio Control" each time?
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In sdrpp select recoarding and i think it will default to one of your
directorys ( Music,Documents, Downloads)
Let me know if you can't get it working, If you can't I will set it up and
see the precise directory where it stores the auto file.
…On Wed, Jan 10, 2024 at 12:02 PM Alex Landherr ***@***.***> wrote:
What should I set the audio record options to in SDR++? The Doppler
corrections are coming through now.
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I have already set the directory for recording and have that working; I meant what sample type and container format should be set for NOAA APT? |
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i would use wav and int16
I would haft to set it up to be sure
…On Wed, Jan 10, 2024 at 1:14 PM Alex Landherr ***@***.***> wrote:
I have already set the directory for recording and have that working; I
meant what sample type and container format should be set for NOAA APT?
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When I get in this after_noon I will set it up again and then i can tell
you exactly how to do it.
…On Wed, Jan 10, 2024 at 1:20 PM Alex Landherr ***@***.***> wrote:
Could you clarify a bit please? I do not understand how exactly I can
achieve the desired effect.
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Might not be necessary; I think I just figured it out. Is there any way to correct the APT frequency for NOAA-15? |
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Not sute about APT frequency
"The transponder data is wrong when it says 137.5 MHz when it should be
137.62 MHz per NOAA's own POES status page"
The only way they will be the same is if the Sat. is directly over head (90
Deg) up from your location.
Gpredict displats tow frequencies
1.
Transponder Freq.
2.
Doppler off set Freq.
…On Wed, Jan 10, 2024 at 1:47 PM Alex Landherr ***@***.***> wrote:
Might not be necessary; I think I just figured it out.
Is there any way to correct the APT frequency for NOAA-15?
The transponder data is wrong when it says 137.5 MHz when it should be
137.62 MHz per NOAA's own POES status page.
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As in the frequency the satellite transmits at is wrong (sorry for using the wrong terminology), if that is wrong the Doppler correction will be wrong. |
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In the Gpredict Radio control the Sat. Freq. You haft to set it to the
wright Freq by clicking the up-down errors.
On Wed, Jan 10, 2024 at 2:12 PM Alex Landherr ***@***.***>
wrote:
… Not sute about APT frequency
"The transponder data is wrong when it says 137.5 MHz when it should be
137.62 MHz per NOAA's own POES status page"
The only way they will be the same is if the Sat. is directly over head (90
Deg) up from your location.
Gpredict displats tow frequencies
1.
Transponder Freq.
1.
Doppler off set Freq.
On Wed, Jan 10, 2024 at 1:47 PM Alex Landherr *@*.***>
wrote:
Might not be necessary; I think I just figured it out.
Is there any way to correct the APT frequency for NOAA-15?
The transponder data is wrong when it says 137.5 MHz when it should be
137.62 MHz per NOAA's own POES status page.
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As in the frequency the satellite transmits at is wrong, if that is wrong
the Doppler correction will be wrong.
I can manually adjust it but have to do it every time I tried it.
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In my experience the image gets slightly warped if there is no Doppler correction; so despite what you say it's still needed. |
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I don't know what software you're using but anything decent will have no issue with it. |
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I've used Orbitron for tracking and sending Doppler corrections, SDR# and WXtoImg for decoding the audio stream from SDR#. |
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So that was with the worse possible software at every step of the way. Maybe if it was 2012 this would be a decent choice but nowadays there are better performing software. Orbitron is horribly outdated but at least it works, so is WXtoImg which is an abandoned proprietary mess full of bugs and SDR# doesn't have the specialized noise reduction that SDR++ has. Use SDR++ for demod and NOAA-APT or SatDump for decoding. |
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Ok, understood. |
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It been a while for me sense i used the radio controll
I set sdrpp to the Sat. Freq. then started the Rigctl server
Started tracking with Gpredict Radio controll and the two worked perfectly
Wait untill you get a NOAA Sat path close to you and give a try.
I think the two of them togather will suprise you how good they work.
Let me know.
…On Wed, Jan 10, 2024 at 3:14 PM Alex Landherr ***@***.***> wrote:
Yes, but is there really now way to keep it from returning to 137.5 MHz
and stay on the correct 137.62 MHz *without* having to manually adjust it
every time?
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Ok, whatever database is used to get the satellite downlink frequency should be updated to actually correspond to what NOAA says. |
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When you decode NOAA Weather transmissions I don't think you want any kind
of noise reduction I thind you want raw data.
…On Wed, Jan 10, 2024 at 4:45 PM AlexandreRouma ***@***.***> wrote:
So that was with the worse possible software at every step of the way.
Maybe if it was 2012 this would be a decent choice but nowadays there are
better performing software. Orbitron is horribly outdated but at least it
works, so is WXtoImg which is an abandoned proprietary mess full of bugs
and SDR# doesn't have the specialized noise reduction that SDR++ has. Use
SDR++ for demod and NOAA-APT or SatDump for decoding.
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I wrote this damn thing, I know what you're supposed to use or not use... |
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How do I best connect SDRpp to Gpredict so that Gpredict can control the frequency of SDR++?
My aim is to track NOAA APT satellites (15, 18 and 19).
I'm on Debian 12 Bookworm and I've successfully set up SDR++ so I can receive FM radio via my HackRF One.
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