[amsat-bb] Re: Antenna direction calibration
nss at mwt.net
Mon Jul 15 05:37:36 PDT 2013
The North Star is the best. even tho it itself is a little off from
exactly North also. But less than a degree. About 0.6 degrees or so.
If that isn't accurate enough there are tables you can look up to learn
what we call cumulation of Polaris. This is a time when Polaris (AKA The
North Star) is directly above or below the pole. and then would give you
an exact AZ setting, then 6 hours before or later Polaris would be east
or west of the pole exactly and this would give you an exat elevation
Never use magnetic readings. depending where you live it can be a LOT off.
The Original Rolling Ball Clock
On 7/14/2013 11:01 PM, John Fickes wrote:
> What I do ( and I'm not sure I'm right,but seems to work ) is to use the
> North star to calibrate. I live at 41.2* latitude, so if I crank my
> antennas to 41* elevation and point north 0* azimuth I should be pretty
> close. I also live at 1* magnetic declination, not much so I don't worry
> much about that. Now I don't do much EME as I don't have any power, but
> I've monitored EME and this seems to get me pretty close. I will also be
> glad to see what others do to calibrate.
> 73 John KC0BMF
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