[amsat-bb] Re: Tracking - End-stop Problem

Dave-K7DAA dave at k7daa.com
Mon Feb 8 02:59:19 PST 2010


If you're running Windows, this won't help you, but MacDoppler does  
this easily, and without operator intervention.  I'm using the same  
equipment you are, but with a MacBook Pro laptop, and it works  


Dave - K7DAA

On Feb 8, 2010, at 2:17 AM, Clive Wallis wrote:

> Hi,
> A problem that I've had for many years is how to track when the
> satellite's azimuth crosses across the rotator's end-stop,  ie. when  
> the
> azimuth changes from 0 to 359 degrees.
> My rotator turns between 0 and 450 degrees, so it should be possible  
> to
> use  angles between  360  and 450  to  overcome a sudden  transition
> from  0 to 360 degrees.
> As the pass data is  available within the tracking program, it  
> should be
> feasible to deal with the problem in the program.   Do any tracking
> programs include this feature?
> A possible solution would be to use a small PIC between the computer  
> and
> tracker, which could modify the commanded azimuth.
> I'm using a Yaseu 5500, LVB tracker, Sat_Explorer tracking program and
> WinXP.
> Any help,  suggestions or comments would be most welcome.
> 73     Clive    G3CWV
> Hitchin, North Hertfordshire, UK
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