[Tech-Assist] STL problem now critical

[Mark Humphrey]

I've been using the sun-sighting method (recommended by Don) for many
years.  I started with a free DOS program called "Geoclock" that
calculated sun angles, but now you'll find Android apps that offer
many more useful features.

For example, the free unregistered version of "Sun Surveyor" gives
present or predicted sun elevation and azimuth angles overlaid on a
compass rose, along with shadow length ratio, sunrise/sunset times and
coordinates.    The $7 full version adds moon position, map view, etc.

I previously used a free Android app called "Shadow Facts", but I'm
not sure if that's still available.

When in doubt, it's certainly a good idea to verify antenna and tower
azimuths against the sun.  A few years ago, we discovered through this
method that the two tower array at WCJW was actually built 2.5 degrees
clockwise from the desired 90 degree line, so we hired a licensed
surveyor to confirm this with DGPS.  The discrepancy was noted in a
recent CP application, and will be finally resolved when we complete a
power increase this year and file a new 302.

Mark

On Thu, Mar 29, 2012 at 8:38 AM, Cowboy <curt at spam-o-matic.net> wrote:
> On Thursday 29 March 2012 08:33:51 am RichardBJohnson at comcast.net wrote:
>> The result will be that both the TX and RX may be sited dead-on without using a compass at all.
>
>  Personally, I find anything done with a magnetic compass to be questionable at best.
>  I've actually seen a compass off by as much as 30 degrees.
>
> --
> Cowboy
>
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