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George Dasher wrote:my experience with such courses is that you are usually calibrating the instrument reader, not the instrument.
Bob Thrun wrote:Let's price things out:
Nomad digital compass, supposedly gimballed $70
SmartTool digital level $100
Disto laser rangefinder $350
Laser Atlamta and MDL combind these elements into
one package for $4000
Bob Thrun wrote:Try to find a glass rod about the diameter of the laser beam.
If you shing a laser beam on a horizontal glass cylinder, it
will be spread out into a vertical fan.
[...]
Bob Thrun
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