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The up-to-date frame of reference
is widely used by The Global
Positioning System (GPS) where a
space-based satellites are bodies of

reference (fig.1.2).

Figure 1.2

Space-based satellites in GPS

1.2. Methods of Determination of Point's Position in Space
Vector method. 

Space position of the material point is described by radius-vector r
(fig.1.3), which connects the
origin of the frame of reference

(body of reference ) with the
point M. According to the
vector method, .space position

of the material point is
described by kinematic equation
 
r  r  t
Figure1. 3 . (1.1)

Coordinate method.
Space position of the

material point can be defined
by Cartesian coordinates x, y, z
For example, body of reference

is Ivano-Franrivsk municipal
hall as shown in fig.1.4. Space
position of balloon as material
point is determined by

equations

Figure1.4

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