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Re: Laser Level A.H.
From: Bruce J. Pennino
Date: 2014 Feb 14, 22:57 -0500

Hi Sean:

I just made a quick sketch and your idea seems ok to me. How about standing beside the laser level placed at a slightly lower elevation, and measuring the distance downward to laser beam? Go to the building where the reflecting mirror is, measure upward and scribe a line (strech a string,etc). Drive a stake in the ground directly under the laser.Stand over the stake and bring the celestial body down to the string line. Seems ok.

As a check, get a hose and fill it with water. Stand over stake, one end by your eye, the other end at your line on the wall. Should be the same.

I thought about doing your idea, more or less , with my total station. I would carefully set it up on my deck at eye height. Set "zero" degrees and hang several targets at " 0" 100 ft away in the woods behind my house (nail targets to trees). Try to bring celestial body down to a connecting " string line". I planned to use a taut rope between the targets. Never tried it.

Bruce

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

From: Sean C

To: bpennino.ce@charter.net

Sent: Friday, February 14, 2014 2:11 PM

Subject: [NavList] Laser Level A.H.

I was thinking about using a laser level as an artificial horizon. I could set the level on a tripod at the same height as my eye and have it project the beam onto my fence, garage, etc. Then, I just have to bring the celestial body down to the laser line, right? Info on a random level on the Home Depot's website states that it has an accuracy of 1/8" at 30 feet. Am I correct in my calculation of 1.19 minutes of arc? If so, I think I could tolerate that. Thoughts, anyone? -Sean C. ---------------------------------------------------------------- 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 ----------------------------------------------------------------

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