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Re: Unrealistic expectations
From: Bruce J. Pennino
Date: 2013 Oct 6, 21:48 -0400

Hello:

Now I've become curious.

At Beavertail last weekend FER and I sighted the moon with my total station/theodolite and had an intercept of 0.20 (calculated by me) and 0.26 (calculated by Kermit), or an average of 0.23 minutes. If I use the average sight data, what is the corresponding accuracy on Azimuth/bearing? I should add that I don't bother trying to "read the height of the celestial body on its vertical centerline, I just care about the height and corresponding time. I think it would easy to " miss " the centerline of a rising and laterally moving object.

Drum roll please.......... ta da.... Kermit, our accuracy , please !?

I would calculate the azimuth using an intercept of 0.00 and 0.23 and take the average....maybe....gotta think about it more.

Bruce

----- Original Message -----

From: rgaarden

To: bpennino.ce@charter.net

Sent: Sunday, October 06, 2013 8:20 PM

Subject: [NavList] Re: Unrealistic expectations

I used a Wild T21. It is old but, I believe, in fine condition. I set up by sighting what I believe to be North and rotated the theodolite to make the sightings which were in the vicinity of 165 degrees. I am capable of miss-reading the micrometer but these readings were grossly consistent. A Thousand Oaks solar filter was over the objective. There was a high but thin cloud cover. I used a stopwatch to help time the observations. I doubt that my problem is instrumentation. It is most likely technique. I didn't expect the azimuth recordings to be as close as they were. It seems that my North sighting point is reasonably close. None the less my goal was to refine the "North" I have established and my observations varied far too much for me to do that. ---------------------------------------------------------------- NavList message boards and member settings: www.fer3.com/NavList Members may optionally receive posts by email. To cancel email delivery, send a message to NoMail[at]fer3.com ----------------------------------------------------------------

: http://fer3.com/arc/m2.aspx?i=125271

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