27
VERTICAL
DATA REDUCTION COMPUTATIONS
Systematic errors
which cannot be sufficiently controlled by instrumentation or observational techniques are
minimized by applying appropriate
corrections to the observed data.
(See Balazs and Young, 1982).
NGS applies seven
corrections
›Level Collimation
›Scale
Imperfections
›Refraction
›Curvature
›Tidal
Accelerations
›Gravity Field
›Magnetic Fields
