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Zenithal star field and direction of the local plumb line (modified
The Result for TS and GPS
Observed differences between directions of plumb line and
Zetetic Astronomy. Earth not a Globe!, by “Parallax.”—A Project
Topographic map of the North-Eastern extension of the Venezuelan
Representative deformed profiles from Tymfristos tunnel, Greece, a long
Positional Astronomy
b. To measure zenith angles, we attached a simple protractor with
The Result for TS and GPS
Meridian (astronomy) - Wikipedia
Lesson 5: Geodetic Datums