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Old School Reverence
Posted: Mon Feb 14, 2011 10:31 am
by LS_8750
Being a victim of the GPS world, I never became acquainted with Polaris or sun observation in my studies. The exam never covered it, I've never had a need for it in the field.
I want to learn polaris and sun observation as described in the 73 Manual. For fun.
I'd like to get some background materials for my endeavor, such as theory, equipment, sources for tables, etc. Any ideas out there?
Cheers.
Posted: Mon Feb 14, 2011 10:59 am
by E_Page
If you can find it, "Astronomy for Surveyors" by Mikhail is the reference you want.
by P.O.B. Publishing Company
Posted: Mon Feb 14, 2011 11:05 am
by Propst
"PRACTICAL SURVEYING GUIDE TO CELESTIAL OBSERVATIONS
A compendium of notes, examples, tables, figures, helpful hints and HP-41 programs for accurate directions from celestial observations."
By Richard L. Elgin, PhD, LS, PE
David R. Knowles, PhD, LS, PE
Joseph H. Senne, PhD, PE
Copyright 1989
Elgin-Knowles produced the ephemeris for Lietz/Sokkia for years until its discontinuance
A nice guide with both the technical and practical ends covered well.
Ben Buckner
Posted: Mon Feb 14, 2011 11:27 am
by bruce hall
wrote a book "Astronomic and Grid Azumuths". I took his class back in 82 or 83 or somewhere around that time.
You will need a filter for the eyepiece for the theodolite, accurate time piece/stop watch, quad sheet or something that tells you what your lat long is, an ephemeris and a program to enter your data into.
If you are gonna use a total station for the observations, you will need a filter for the other end of the scope so the suns' light doesn't enter your shooter.
Put that filter up to your eye, view the sun, it looks like a hot dime.
Posted: Mon Feb 14, 2011 12:22 pm
by David Anaya
Jeremy Evans does cover that topic in the second advanced problems course at Santiago college
Posted: Mon Feb 14, 2011 12:47 pm
by David Anaya
Posted: Mon Feb 14, 2011 2:44 pm
by land butcher
Hopefully they are up graded to GPS now, but 20 some years ago all mine lease surveys had to be located by sun or star shots.
Reminder
Posted: Mon Feb 14, 2011 3:57 pm
by Dave Lindell
You only get two chances to look at the sun without a filter.
Once with each eye.
Ben Buckner's book is very good too
Posted: Mon Feb 14, 2011 3:59 pm
by Propst
I'll agree with Bruce on that one, I really got a lot out of that book.
I haven't seen the Mikhail book, but I'd take Evan's word on it.
Do both a Sun and star shot, they are very different in approach and technique, and I've found most surveyors love one and don't care much for the other.
Have fun!