1. Presented by
Deepak keshri

2. GPS project was developed in 1973 for
American army. GPS was created and
realized by department of defence.
 GPS is a space based navigation system
that provides location and time
information in all weather anywhere on
the earth.
 It was originally run with 24 satellite. The
first satellite launch in 1989 and last in
1994.

3.  There are three segments of gps
 Space segment
 Control segment
 User segment

5.  The satellite constellation consist of 24
satellite constellation.
 These satellites are positioned in six
earth centered orbits with four satellites
in each plane.
 The orbital period of a gps is 11 hour and
58 min. They orbit at height of 20,180 km
above earths surface.

6.  The CS consists of 3 entities:
 Master Control System
 Monitor Stations
 Ground Antennas

7.  A master control station
tracks all satellite and
ensure they are operating
properly and compute
their position in space.
 Master control station is
situated at Falcon air
force base Colorado ,
USA

8.  There are six monitor stations
 Each of the monitor stations checks the exact
altitude, position, speed, and overall health
of the orbiting satellites.

9.  It includes millions of
civil, commercial
, scientific users.
 It includes american
defence forces as well as
other forces.

10.  For determining the position of a object ,
GPS uses the Trilateration method.
 Trilateration is the process of
determining locations of points by
measurement of distance using circles
and spheres.
 Trilateration have practical applications
in surveying and navigation.

11. Y
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12. X

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14. Y
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15. Y
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X Z

16.  Gps aircraft tracking
 Vehicle,person,pet tracking system
 Map making
 Disaster relief/emergency services
 Military purpose
 Sag measurement in overhead line

17.  A gps device is placed at the midpoint of
the conductor
 Due to the effect of ice and wind,
clearance from the ground is reduced
 This reduction can be calculated with the
help of gps

20. Thank you