@geeoddmike?ÿ I have that pub.?ÿ I keep thinking it was published someplace else but can't remember where.

@geeoddmike?ÿ ?ÿI understand. If you ever get to Tombstone, AZ?ÿ let me know and I will pull out my toys and you can have some fun.

@shawn-billings?ÿ With optical (non electronic leveling) yes its hard to get less than 1.5 seconds of arc. You can observe from both ends of your line...

@shawn-billings?ÿ ?ÿWhat was your expectancy on how accurate of an azimuth you could get with the Wild T2 Theodolite?

@shawn-billings?ÿ Did you get a chance to turn some angles with the T2?

@shawn-billings?ÿ Very nice. Where is the suspension level (sometimes called the hanging level). Is this yours and if so how much did you pay for it?

@john-hamilton?ÿ ?ÿThere are several things that can bother the results of astro-azimuth. But first let look at the paper by William Carter and James ...

@geeoddmike?ÿ ?ÿNGS did own a DKM3A theodolite but your mention of the TDM would have been the instrument to use (I forgot they have one or two of the...

The mention of the "antique Wild T-3" Theodolite?ÿ used by NGS brought back some old memory's of research done on comparison between the T-3,T-4 and t...

@shawn-billings?ÿ ?ÿI did the search on the ISO number. Its?ÿ 17123-3:2001?ÿ Optics and optical instruments-- Field procedures for testing geodetic an...

@shawn-billings?ÿ ?ÿUsing ISO 17123.XX will tell you how to test your instrument and show the Math to see if your instrument is working according to m...

@gene-kooper?ÿ I can only tell you what the?ÿTheory?ÿsays. I have no data to show you. I can say this that from my post above to now (in time) I looke...

Gene the theory about turning clockwise and then counterclockwise is: when you turn one way with the theodolite?ÿtorque might build up. So turning the...

@geeoddmike?ÿ Thanks for that.

@geeoddmike?ÿ ?ÿI like you BTW remark. I gave 2 references and can give many more.?ÿ Back in the early 70's I was working for a Large Civil Service O...

@geeoddmike?ÿ ?ÿIf you cannot find that publication I can mail you mine and you can copy it, if you want. It's 46 pages long. ?ÿ

@geeoddmike?ÿ I guess I did not explain it good enough or you did not understand my wording. I am giving ONE angle and how to record the D&R's fo...

@geeoddmike?ÿ Please note that the NGS pub. SP #247 you quote (on page 193 and other pages) spell the word base line?ÿ not baseline Also note that i...

Shawn, the above post by me?ÿ about 6 circle settings; I gave you what the book says to use but I never set the 10 seconds on the 1st set. I always us...

@shawn-billings?ÿ Shawn I had to cut short my post above but if you look up the one reference about Specifications to Support Classification........ y...