User's Manual

Satellite
Signal
Satellite
Signal
Satellite
Signal
A. Introduction: What is Global NAV A-01
The GLOBAL NAV, a personal navigation system,
contains a Transceiver, a Watch and a PC-Link
unit. The sy st em e xp loits th e 24-sat el li te s
network which circles the earth in the earth's
lower orbit, to determine one's position wherever
in the world and at any time.
As soon as, a satellite of the network is hooked
by the Transceiver, it will compute the time gap
between the signal was transmitted by that
satellites and the time the signal is received by
th e Tran sc e iv e r. Us ing tha t tim e ga p, t he
Transceiver will get the distance (satellites-user
distances) of the user from the satellite.
Similarly the Transceiver will employ the above
step s a gai n until 3 diffe rent satellites-user
distances are got. Then, the GLOBAL NAV can
determine the user's current position - latitude,
longitude and altitude (mean sea level in meter).
Once the user's position has been determined,
the GLOBAL NAV can further compute other
information such as the current, average and
maximum travel speed, travel distance and
heading compass value (moving direction).