Add satellites in satmode possible?

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BA7LWX
Posts: 10
Joined: Mon Oct 11, 2021 3:14 am

Add satellites in satmode possible?

Post by BA7LWX » Mon Nov 15, 2021 2:46 am

For now there are only a few FM sats in satellite mode,and the satmode solves many problems like doppler,channel saving...
But is it possible to add some SSTV sats in this mode,like no-104,fo-99,sonate...Saving aos and los frequencies is such a big task to me :? .

N1KY
Posts: 84
Joined: Sun May 24, 2020 10:46 pm

Re: Add satellites in satmode possible?

Post by N1KY » Mon Nov 15, 2021 5:52 am

https://github.com/LibreDMR/OpenGD77_Us ... ite-screen

The CPS Integration section is what you are looking for.

BA7LWX
Posts: 10
Joined: Mon Oct 11, 2021 3:14 am

Re: Add satellites in satmode possible?

Post by BA7LWX » Tue Nov 16, 2021 2:05 am

I found it!Take a chance tonight,thx!
N1KY wrote:
Mon Nov 15, 2021 5:52 am
https://github.com/LibreDMR/OpenGD77_Us ... ite-screen

The CPS Integration section is what you are looking for.

VK3KYY
Posts: 7478
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia

Re: Add satellites in satmode possible?

Post by VK3KYY » Tue Nov 16, 2021 4:38 am

BA7LWX wrote:
Tue Nov 16, 2021 2:05 am
I found it!Take a chance tonight,thx!
N1KY wrote:
Mon Nov 15, 2021 5:52 am
https://github.com/LibreDMR/OpenGD77_Us ... ite-screen

The CPS Integration section is what you are looking for.
Do these satellite transmit in normal 25kHz FM? Or are you just going to use the radio for the predictions ?

BA7LWX
Posts: 10
Joined: Mon Oct 11, 2021 3:14 am

Re: Add satellites in satmode possible?

Post by BA7LWX » Tue Nov 16, 2021 8:43 am

Work in 25khz FM...?Maybe yes, i used to receive the sstv images in frequency mode,so,that will be ok?
VK3KYY wrote:
Tue Nov 16, 2021 4:38 am
BA7LWX wrote:
Tue Nov 16, 2021 2:05 am
I found it!Take a chance tonight,thx!
N1KY wrote:
Mon Nov 15, 2021 5:52 am
https://github.com/LibreDMR/OpenGD77_Us ... ite-screen

The CPS Integration section is what you are looking for.
Do these satellite transmit in normal 25kHz FM? Or are you just going to use the radio for the predictions ?

BA7LWX
Posts: 10
Joined: Mon Oct 11, 2021 3:14 am

Re: Add satellites in satmode possible?

Post by BA7LWX » Tue Nov 16, 2021 9:16 am

BTW,I wanna ask a question,how does the satmode calculate the doppler affect to frequency?

VK3KYY wrote:
Tue Nov 16, 2021 4:38 am
BA7LWX wrote:
Tue Nov 16, 2021 2:05 am
I found it!Take a chance tonight,thx!
N1KY wrote:
Mon Nov 15, 2021 5:52 am
https://github.com/LibreDMR/OpenGD77_Us ... ite-screen

The CPS Integration section is what you are looking for.
Do these satellite transmit in normal 25kHz FM? Or are you just going to use the radio for the predictions ?

VK3KYY
Posts: 7478
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia

Re: Add satellites in satmode possible?

Post by VK3KYY » Tue Nov 16, 2021 9:34 am

BA7LWX wrote:
Tue Nov 16, 2021 9:16 am
BTW,I wanna ask a question,how does the satmode calculate the doppler affect to frequency?
It uses the AMSAT "Plan13" algorithm

See

https://www.amsat.org/amsat/articles/g3ruh/111.html


(Only the algorithm implementation, not the BASIC program, because the firmware is not written in BASIC)

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