Satellites in the Orbit
Global
Positioning System is used for
Positioning and Navigation
To take very accurate time
Ranging or Distant measurement
GPS
Segments;
GPS need three factors to work
Space Segment
The space
segment consists of the satellites themselves
Altitude of
20,000km
32
operational satellites
Four to
twelve GPS satellites visible from any point on the earth
There are
six orbital planes with at least four satellites in each plane
Period of
the satellite 11hrs and 56mins to orbit the earth
Generate and Transmit code, carrier phases and navigation message
Control Segment
There are
five major monitoring/tracking stations spaced around the globe and one Master
Control Station located in Colorado Springs, Colorado
Each station
sends information to the Control Station which facilitate control station to
control them and predict their orbits
Monitor the
clock errors
Each
stations monitor and check up the satellites twice a day
The
monitoring stations transmitted all the tracking data to the master control
station
User Segment
The user
requires a GPS receiver in order to receive the transmissions data from the
satellites.
GPS receiver
calculates the location (Longitude and latitude) based on signals from the
satellites.
The users
consist of military and civilians.
Users will
get the accurate time
Number of
applications to use (GIS, Traffic and transport, Security service, Disaster
managements)
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