Tracking past 360 degrees

Jamie ELOVSKI KC3ELT

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Jul 27, 2025, 6:46:55 PM7/27/25

to SkyRoof

Has anyone managed to get it to track past 360 degrees. I have a yeasue g5500 that has a total of 450 degrees of travel so it can go past 360. However if the satelite path goes past 360 it swings back around to 0 rather then going to 360 +.

Sincerely,

Jamie Elovski

Alex VE3NEA

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Jul 28, 2025, 8:42:15 PM7/28/25

to SkyRoof

SkyRoof just sends the satellite azimuth to rotctl.exe, it does not attempt to be smart about choosing the optimum path. I expect rotctl.exe to do this, or even a CPU-based rotator controller. The same applies to the elevation range of 0-180 degrees, this could also be exploited but not by SkyRoof itself.

KC3ELT ELOVSKI

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Jul 28, 2025, 8:52:43 PM7/28/25

to Alex VE3NEA, SkyRoof

Hum, I think it’s tracking doing it. Since I can enter 400 and Skyroof will tell the rotor to move.

Sincerely,

Jamie

On Jul 28, 2025, at 8:42 PM, Alex VE3NEA <ve3...@gmail.com> wrote:

SkyRoof just sends the satellite azimuth to rotctl.exe, it does not attempt to be smart about choosing the optimum path. I expect rotctl.exe to do this, or even a CPU-based rotator controller. The same applies to the elevation range of 0-180 degrees, this could also be exploited but not by SkyRoof itself.

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Alex VE3NEA

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Jul 28, 2025, 9:27:58 PM7/28/25

to SkyRoof

After thinking about this, I agree that SkyRoof must plan how the pass will be tracked before it moves the antenna to the AOS point. To do it right, one needs to know the whole pass, from AOS to LOS. This information is available in SkyRoof but not in rotctld.exe.

Wells Everett

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Jul 31, 2025, 9:13:06 PM7/31/25

to Jamie ELOVSKI KC3ELT, SkyRoof

Needs a flip over algorithm like other trackers.

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Gert de Haan

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Aug 1, 2025, 3:20:55 AM8/1/25

to Wells Everett, Jamie ELOVSKI KC3ELT, SkyRoof

Hi,

I'm working on a homemade rotor based on the yaesu gs-232b protocol. I've setup rotctld to rotor type 601, but it then goes back to 0 instead of going further then 360. But after setting rotctld to rotor type 603 it works upto 450. So this works fine for me. Just to let you know about my findings.

Rgrds Gert

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From: sky...@googlegroups.com <sky...@googlegroups.com> on behalf of Wells Everett <supwi...@gmail.com>
Sent: Tuesday, July 29, 2025 5:23:41 PM
To: Jamie ELOVSKI KC3ELT <kc3...@gmail.com>
Cc: SkyRoof <sky...@googlegroups.com>
Subject: Re: Tracking past 360 degrees

To view this discussion visit https://groups.google.com/d/msgid/skyroof/CAPnw5VS%2BJXyTYhiwFViA62RM%3DAf-SaxNVdAmAiV%3D%2B2dFuDss_A%40mail.gmail.com.

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