BigEI don't know about your math but there were different heights of Bilby towers.37 foot,50 foot,77 foot, 90,103,116 and after that they were called ...
Bilby Tower for BigEBigE you want Special Publication #158. "Bilby Steel Tower For Triangulation"(1940)NGS pub. and I would guess you can download a p...
You are correct in HOW to calculate the uncertainty BUT as you say you must check with the manufactures manual to see HOW he specify the performance o...
Math Teacher, I checked it and its there. If you don't find it we can work something out.ThanksJOHN NOLTON
Math Teacher you did not offend me nor do I think you offended anyone on the board for wanting to understand how this problem is solved.I wrote up som...
Math Teacher, you DO NOT consider each component separately. You might find this in Bomford's book on Geodesy. There is another reference around 1973 ...
Dave, how much did it cost to replace the internal battery?JOHN NOLTONTombstone, AZ.
Math Teacher, did you see that the distance was in feet and the s.d. of the measurement was given in mm + 2ppm.You might want to change the distance t...
Dave and other posters; I would like to point out that this drawing that Dave posted is terrible. For a better understanding of what deflection of the...
And now we have "DEFLEC12A" which is in NAD83 2011.0 reference Frame. See NGS web site.JOHN NOLTONTombstone, AZ
"above average pay" ? And just what is that?JOHN NOLTONTombstone, AZ
A Hint: the angles are 75,45 and 60 degrees exactly. Solved 2 different ways as a check.JOHN NOLTONTombstone, AZ
There were at least 7 different levels made by Filotechica Salmoiraghi, Milano.The standard devation of 1 km of leveling is given after each inst. bel...
Another bookIn my above post about books on astronomic azimuth observation I left out.The Elements of Astronomy for Surveyors by J. B. MackieJOHN NOLT...
For rfc and others.Some other books that are good to learn Astronomic observation from would be:1. A Manual on Astronomic and Grid Azimuth by R.B. Buc...
Polaris & curvature correctionBill93 one of the corrections made to an astronomic observation on Polaris would be "curvature correction" of which ...
Bill93 I would like you to show me (reference book or paper)where it says the "right way" according to you on how to reduce "Polaris observations".JOH...
