The GPS consists of 3 segments - the space segment of 24 satellites orbiting Earth, the control segment of ground stations monitoring the satellites, and the user segment of GPS receivers. GPS satellites continuously transmit radio signals allowing receivers to calculate their location on Earth by triangulating signals from at least 3 satellites. Originally intended for military use, GPS is now widely used for civilian navigation in vehicles, hiking, boating and more.
This content introduces the Global Navigation Satellite System (GNSS), its example, earth observation orbit types, coordinate systems, GNSS time system, converting height (ellipsoidal, geoid, orthometric heights) and various GNSS applications.
Global Positioning System (GPS) is the only system today able to show one’s own position on the earth any time in any weather, anywhere. This paper addresses this satellite based navigation system at length. The different segments of GPS viz. space segment, control segment, user segment are discussed. In addition, how this amazing system GPS works, is clearly described. The various errors that degrade the performance of GPS are also included. DIFFERENTIAL GPS, which is used to improve the accuracy of measurements, is also studied. The need, working and implementation of DGPS are discussed at length. Finally, the paper ends with advanced application of GPS.
It depicts the basic information about GPS technology and its various uses in engineering and other fields. May be useful for students of engineering and for presentation.
A Comprehending overview of how a GPS (global positioning system) works with a set of satellites ready to provide precision status on location to base station (cell) of user.
#Share the Knowledge
This content introduces the Global Navigation Satellite System (GNSS), its example, earth observation orbit types, coordinate systems, GNSS time system, converting height (ellipsoidal, geoid, orthometric heights) and various GNSS applications.
Global Positioning System (GPS) is the only system today able to show one’s own position on the earth any time in any weather, anywhere. This paper addresses this satellite based navigation system at length. The different segments of GPS viz. space segment, control segment, user segment are discussed. In addition, how this amazing system GPS works, is clearly described. The various errors that degrade the performance of GPS are also included. DIFFERENTIAL GPS, which is used to improve the accuracy of measurements, is also studied. The need, working and implementation of DGPS are discussed at length. Finally, the paper ends with advanced application of GPS.
It depicts the basic information about GPS technology and its various uses in engineering and other fields. May be useful for students of engineering and for presentation.
A Comprehending overview of how a GPS (global positioning system) works with a set of satellites ready to provide precision status on location to base station (cell) of user.
#Share the Knowledge
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This presentation was created by my powerpoint design agency Slides. We are based in Spain but have clients worldwide.
Drop me an email and we will discuss your project.
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The Presentation on "Global Positioning System" gives an insight on the segment of GPS, how the positioning system works, its advantages and disadvantages, applications and new innovations in the field.
Disclaimer: None of the information in the above Presentation is authored by me. They references for the information used is the internet, news articles and books.
GPS technology
Google maps
Navigation satellite base
This communicates directly with a control centre through a mobile network, whether General Packet Radio Service (GPRS) or 4G
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Session Overview
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https://www.rttsweb.com/jmeter-integration-webinar
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2. What is GPS?
Global Positioning System (GPS)
It is a satellite-based navigation system.
Made up of a network of 24 satellites placed into orbit
by the u.s. department of defense.
Gps was originally intended for military applications, but
in the 1980s, the government made the system
available for civilian use.
Gps permits land, sea, and airborne users to determine
their three-dimensional position, velocity, and time.
It can be used by anyone with a receiver anywhere on
the planet, at any time of day or night, in any type of
weather.
3. Segments
•
•
•
GPS uses radio transmissions. The satellites transmit
timing information and satellite location information.
The system can be separated into three parts:
Space segment
Control Segment
User
Segment
5. Space Segment
•
•
•
The space segment consists of the satellites themselves.
According to the United state Naval observatory there
are currently 27 operational GPS satellites about 11,000
miles up in space.
This constellation provides between five and eight GPS
satellites visible from any point on the earth.
6. It takes each satellite about twelve hours to orbit the
earth. There are six orbital planes with at least four
satellites in each plane.
7. Control Segment
•
The control segment is a group of ground stations that
monitor and operate the GPS satellites. There are
monitoring stations spaced around the globe and one
Master Control Station located in Colorado Springs
8. There are actually five major monitoring
systems, the figure below does not include
the Hawaiian station
9. User Segment
•
•
The user requires a GPS receiver in order to receive the
transmissions from the satellites. The GPS receiver
calculates the location based on signals from the
satellites
The users consist of both the military and civilians.
previous
Table of Content
Next
10. How it works
•
•
•
GPS satellites circle the earth twice a day in a very
precise orbit and transmit signal information to earth.
GPS receivers take this information and use
triangulation to calculate the user's exact location.
the GPS receiver compares the time a signal was
transmitted by a satellite with the time it was received.
The time difference tells the GPS receiver how far away
the satellite is.
11. •
•
•
the receiver can determine the user's position and
display it on the unit's electronic map.
A GPS receiver must be locked on to the signal of at
least three satellites to calculate a 2D position and track
movement
four or more satellites in view, the receiver can
determine the user's 3D position
12. How accurate is GPS?
•
•
•
•
GPS receivers are extremely accurate due to parallel
multi-channel design.
Garmin's 12 parallel channel receivers are quick to lock
onto satellites when first turned on and they maintain
strong locks, even in dense foliage or urban settings
with tall buildings.
Certain atmospheric factors and other sources of error
can affect the accuracy of GPS receivers.
GPS receivers are accurate to within 15 meters on
average.
13. •
•
GPS receivers with WAAS capability can improve
accuracy to less than three meters on average.
Users can also get better accuracy with Differential GPS
(DGPS), which corrects GPS signals to within an average
of three to five meters.
14. What's the signal?
•
•
•
GPS satellites transmit two low power radio signals,
designated L1 and L2.
Civilian GPS uses the L1 frequency of 1575.42 MHz in
the UHF band.
The signals travel by line of sight, meaning they will pass
through clouds, glass and plastic but will not go through
most solid objects such as buildings and mountains.
15. A GPS signal contains three different bits of
information
•
•
•
pseudorandom code
ephemeris data
almanac data
16. Sources of GPS signal errors
Factors that can degrade the GPS signal and thus affect
accuracy include the following:
• Ionosphere and troposphere delays
• Signal multipath
• Receiver clock errors
• Orbital errors
• Number of satellites visible
• Satellite geometry/shading
• Intentional degradation of the satellite signal
23. Advantages of GPS:
•
•
•
•
•
•
•
•
GPS is extremely easy to navigate as it tells you to the direction for
each turns you take or you have to take to reach to your
destination.
GPS works in all weather so you need not to worry of the climate as
in other navigating devices.
The GPS costs you very low in comparison other navigation
systems.
The most attractive feature of this system is its100% coverage on
the planet.
It also helps you to search the nearby restaurants, hotels and gas
stations and is very useful for a new place.
Due to its low cost, it is very easy to integrate into other
technologies like cell phone.
The system is updated regularly by the US government and hence is
very advance.
This is the best navigating system in water as in larger water bodies
we are often misled due to lack of proper directions.
24. Disadvantages of Global Positioning System
•
•
•
•
•
Sometimes the GPS may fail due to certain reasons and in that case
you need to carry a backup map and directions.
These systems rely on batteries. Once the battery is drained out,
the system does not work.
Sometimes the GPS signals are not accurate due to some obstacles
to the signals such as buildings, trees and sometimes by extreme
atmospheric conditions such as geomagnetic storms.
Price of the system is a major concern. GPS systems cost a high
amount if they have lots of features.
Accuracy is again an issue. The systems are not always updated, so
we do not know when a road has been closed or when a new road
has been opened.