Height increments were converted into geopotential number increments and later calculated into conventional normal height values.
Geopotential numbers are used for determining the differences in surveyed geometric heights and "gravimetrically corrected" normal heights.
As described above, to determine the effect of the gravity field gradient along a levelling profile to the levelling results, the height increments measured need to be converted into geopotential numbers, if necessary, adjusted and later converted to conventional normal height values.
0]) has an exact expression (see equation 1) related to physical quantities: the geopotential number C, and the mean value of the gravitational accelerations taken along the plumb line [bar.
One of the basic quantities needed to compute the orthometric height, the geopotential number, is taken directly from the results of the general adjustment NAVD88.
143 m local normal height, the geopotential number
in the top of Phanxipang Mountain in Vietnam is measured as: [[bar.
t]([OMEGA])] denotes the geopotential number
, [differential](r, [OMEGA])/[differential]t and [differential][gamma](r,[fi])/[differential]n stand for the actual and normal gravity gradient, G is Newton's gravitational constant, and the mean value of topographical density [[rho]o is adopted instead of the actual topographical density [rho](r,[OMEGA]) distribution.
Research interests: gravity field and measurements, height system and geopotential number, adjustment of geodetic network, quasi-geoids modelling, geodetic works in civil aviation.
Research interests: terrestrial laser scanning, height system and geopotential number, adjustment of geodetic network.
To obtain the height of points given in metres, the geopotential number has to be divided by gravitational acceleration.
The unit of geopotential numbers is also called GPU (geopotential unit) where 1 GPU = 1 kgalm = 10 Nm/kg = 10 [m.
The creation of conditions to make feasible, through geopotential numbers
, the integration of the vertical networks of the countries involved in the surveys is also pursued.