Spectra-precision Survey Pro v4.5 Ranger User Manual Manual de usuario descargar pdf (Pagina 264)

User’s Manual – GPS Mode

254

Vertical:

Slope: is the North and East tilt of the inclined plane adjustment.

These values are given in parts per million, and represent the radian

angle values of the deflection between the ellipsoid normal and the

local gravity vector. This tilt approximates what a geodosist would

call 'deflection of the vertical'.

Separation: is the shift between the local elevation and the vertical

reference surface (geoid elevations when using a geoid model or

ellipsoid height when using localization vertical only).

Origin: is the local coordinate of the first point used in the control

point list. The slope values are applied from this point.

Vertical Calibration and Geoid Modeling

If you do not use a geoid model, vertical localization will solve for

slope and separation using the measured heights and the control

elevations. If you do use a geoid model, vertical localization will solve

for the separation between the geoid elevation and your control

elevation. Geoid elevations are computed from measured heights and

geoid undulation using the height equation (Page 207):

h = H + N

Fig. 9: Vertical Localization

Three control points calculate a plane to model the deflection and shift

between the geoid and ellipsoid surface.

Separation

Normal

to Geoid

Normal to

Ellipsoid

Deflection (a,b)

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Spectra-precision Survey Pro v4.5 Ranger User Manual Manual de usuario Pagina 264