Error Sources

• GPS Obs.

• Short/Int. ?

• Statewide adjustments (HARNs)

• CORS

• National adjustment

• Gravimetric Geoid

• Faye anomalies

• DEM resolution and accuracy

• Remove-and- Restore (EGM96)

• 1D FFT solution

• New DEM/gravity

• Combined data & Fourier solution

• Leveling (BM)

• Long/Int. ?

• Quality of initial gravity

• The effect is greatest in the mountains

• Propagation

• GPS/Leveling

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