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GPS
(Global Positioning System)
Prepared by
P.A.Nadgouda
Assistant Professor
What is GPS?
GPS, which stands for Global Positioning System,
is the only system today able to show you your
exact position on the Earth anytime, in any
weather, anywhere.
The three parts of GPS are:
•Satellites
•Receivers
•Software
Satellites
There are quite a
number of satellites out
there in space. They
are used for a wide
range of purposes:
satellite TV, cellular
phones, military
purposes and etc.
Satellites can also be
used by GPS receivers.
GPS Satellites
The GPS Operational
Constellation consists of
24 satellites that orbit
the Earth in very precise
orbits twice a day. GPS
satellites emit
continuous navigation
signals.
Receivers and Satellites
GPS units are made to
communicate with GPS
satellites (which have a
much better view of the
Earth) to find out
exactly where they are
on the global scale of
things.
GPS Signals
Each GPS satellite
transmits data that
indicates its location
and the current time. All
GPS satellites
synchronize operations
so that these repeating
signals are transmitted
at the same instant.
Physically the signal is
just a complicated
digital code, or in other
words, a complicated
sequence of “on” and
“off” pulses.
Latitude and Longitude
Latitude and Longitude are
spherical coordinates on the
surface of the earth. Latitude
is measured North or South
of the Equator. Longitude is
measured East or West of
Greenwich. GPS uses
Latitudes and Longitudes to
reference locations.
Waypoints
Waypoints are locations or landmarks that can be
stored in your GPS. Waypoints may be defined and
stored in the unit manually by inputting latitude and
longitude from a map or other reference.
Latitude and
Longitude
Your
location
Direction
of
waypoint
Date
and
Tim
e
Waypoint
Or more usually,
waypoints may be
entered directly by
taking a reading with the
unit at the location itself,
giving it a name, and
then saving the point.
Data Dictionary
GPS units collect data in:
– Points
– Lines
– Areas
These are called features.
A data dictionary is a
means by which we collect
specific information about
a data feature.
Thank You

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GPS-12.pptx

  • 1. GPS (Global Positioning System) Prepared by P.A.Nadgouda Assistant Professor
  • 2. What is GPS? GPS, which stands for Global Positioning System, is the only system today able to show you your exact position on the Earth anytime, in any weather, anywhere. The three parts of GPS are: •Satellites •Receivers •Software
  • 3. Satellites There are quite a number of satellites out there in space. They are used for a wide range of purposes: satellite TV, cellular phones, military purposes and etc. Satellites can also be used by GPS receivers.
  • 4. GPS Satellites The GPS Operational Constellation consists of 24 satellites that orbit the Earth in very precise orbits twice a day. GPS satellites emit continuous navigation signals.
  • 5. Receivers and Satellites GPS units are made to communicate with GPS satellites (which have a much better view of the Earth) to find out exactly where they are on the global scale of things.
  • 6. GPS Signals Each GPS satellite transmits data that indicates its location and the current time. All GPS satellites synchronize operations so that these repeating signals are transmitted at the same instant. Physically the signal is just a complicated digital code, or in other words, a complicated sequence of “on” and “off” pulses.
  • 7. Latitude and Longitude Latitude and Longitude are spherical coordinates on the surface of the earth. Latitude is measured North or South of the Equator. Longitude is measured East or West of Greenwich. GPS uses Latitudes and Longitudes to reference locations.
  • 8. Waypoints Waypoints are locations or landmarks that can be stored in your GPS. Waypoints may be defined and stored in the unit manually by inputting latitude and longitude from a map or other reference. Latitude and Longitude Your location Direction of waypoint Date and Tim e Waypoint Or more usually, waypoints may be entered directly by taking a reading with the unit at the location itself, giving it a name, and then saving the point.
  • 9. Data Dictionary GPS units collect data in: – Points – Lines – Areas These are called features. A data dictionary is a means by which we collect specific information about a data feature.