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Published byAugustine Wright Modified over 9 years ago
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GPS Survey Equipment GPS Trimble R6 or R8 Legs+Bipod Controller* Base Station or VRS Competencies #1-5
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GPS Survey Equipment GPS Equipment Basics In every office? Requires only 1 person Controller Setup Datums Anyone can get GPS buttons to work, we want QUALITY DATA! Competencies #1-5
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GPS Survey Equipment
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Competencies #1 How GPS works with satellites
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Position Dilution of Precision (PDOP)
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Sources of Error
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GPS Survey Equipment Satellites send timestamp signals to Earth 3 satellites required for horizontal 4 satellites required for vertical 5 th is required for survey grade Competencies #1
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GPS Survey Equipment Competencies #1 Why need phone?
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GPS Survey Equipment Competencies #1 Rover plus base station Why need phone
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GPS Survey Equipment Horizontal- Total Station accuracy about the same Vertical- Total Station generally more accurate Accuracy if not fixed Does not work properly without “sky” PDOP, Satellites Competencies #1
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GPS Survey Equipment GPS Equipment Special Issues Site Calibration Once per Job Minimum # control points 2 big settings Observed Control Point Fast shot- Topo Can’t get close to building (15degree rule) Competencies #2
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