[time-nuts] Slightly OT - GPS-Based Accurate Direction Finding
jimlux
jimlux at earthlink.net
Fri Aug 27 14:07:40 UTC 2010
Thomas A. Frank wrote:
> I would suggest you buy an old surveying transit.
>
> This is what largely they were intended for.
>
ANd with a transit, you can easily see Polaris in the day time.
Here's an article discussing how to do it
http://www.cadastral.com/cad-polr.htm
skip down to the section on Observation Procedure
It's a bit trickier than it says...
-- you won't be able to do this the first time
small field of view on the telescope means you have to be pointed
pretty close to find it. What I wound up doing is marking the place
where I'd set the theodlite up, going out at night and finding Polaris,
and finding a suitable object on the horizon to reference to. Then the
next day, I set up the tripod and used that object to get the azimuth
approximate, tipped up to the right elevation, and, et voila, there it
was in the scope. The comment about focus is right on though.
More information about the Time-nuts_lists.febo.com
mailing list