Re: [amsat-bb] Lock on Tracking

[Howie DeFelice <hdefelice@xxxxxxxxxxxxxx>]

Commercially, sites using inclined orbit GEO's and INMARSAT maritime
installations use a step track method. The antenna is moved in small
increments in a pattern. Several signal strength readings are averaged at
each position and the antenna is nudged toward the center of the position
that yields the best average signal strength. This method would work fine
for AO-10, AO-40 or any other relatively slow moving satellite.

Howie AB2S

----- Original Message -----
From: "Al Lawler" <al.lawler@oracle.com>
To: "Ben" <b-fisher@uiuc.edu>
Cc: "Rod Smallwood" <Rod@sbs293.customer.demon.com>; "AMSAT-BB"
<amsat-bb@AMSAT.Org>
Sent: Wednesday, December 11, 2002 10:17 AM
Subject: Re: [amsat-bb] Lock on Tracking


>
>     You could concievably average the
> peaks, then try to drive the antennas based
> on the averaged signal, combined with a bit
> of AI knowledge of what sort of correction
> last worked,  but it would probably take
> a relatively custom  solution for
> each installation, I'd  imagine
>
> (and things like blowing leaves,
> or varying precipitation intensity
> would make it exciting to debug... :^)
>
>   -al
>
>
>
> Ben wrote:
> >
> > Hi Rod
> >   I have thought about building a system that would work by using the
signal
> > strength from the satellite as reference than a simple error amplifier
> > circuit to drive the AZ-El. But this may be very difficult if the signal
> > from the satellite fluxuates allot. With fast enough circuits and
motors, it
> > seems possible, but it would probably take a good computer programmer to
> > develop a workable algorithm.
> > My thoughts
> > Ben K9BF
> > ----- Original Message -----
> > From: "Rod Smallwood" <Rod@sbs293.customer.demon.com>
> > To: <amsat-bb@AMSAT.Org>
> > Sent: Wednesday, December 11, 2002 4:16 AM
> > Subject: [amsat-bb] Lock on Tracking
> >
> > > Unless I am much mistaken everybody uses predictive tracking.
> > > Has anybody had any experience with Radar style tracking
> > > where the system locks on to the target (ie AO40) and follows
> > > it?
> > >
> > > Rod (G8DGR)
> > >
> > >
> > >
> > > ----
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> > >
> >
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> ----
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