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Replies
Hi hzeit!
Target optimum size depending also what TS are You using. Assuming a standard 30X optical magnification, distance and visibility (ambient light condition) must be considered: with manual totals station, I suggest a min size of 40x40 mm @ 30 meters max distance (with closer distance, 15x15 mm @ 15 meters are enough)
Also, if You are using an automatic total station, "bigger is better" is not ever true: I remeber several years ago my tests with a Topcon IS-201 that was working well, in some condition, with smaller target, but usually need a medium/large target.
Sokkia NET-05A gives great performance within small targets: I using it in my building monitoring applications. With a 50x50 mm target (RS50R-N model) it can autopointing up to 50 meters far.
Often, the thickness of the reticle's lines determines the maximum sighting distance with the manual total station (reticle is overlapping the cross on the target and hide it!).
The resolving power of the optics (common value for currently total stations) is about 1.20e-5 rad.
Bye!
Carlo Alberto