GPH 492/692. GPS/Survey Team Results Spring 2010 (to support gravity survey). Jay Goldfarb Courtney Murphy Garry Richardson Jason Henderson. Summary of Methods. Trigonometric leveling (total station) for upper Hidden Valley gravity points (with one GPS elevation)
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GPS/Survey Team Results
(to support gravity survey)
Effect of 30 m error in latitude on normal gravity calculation:
-> a 20 cm elevation error results in 0.04 mGal error
-> a 75 cm elevation error results in 0.15 mGal error