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GPS: Global Positioning System

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Lisa Drekic

on 8 July 2014

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Transcript of GPS: Global Positioning System

Figure 1: Image of the 24 geostationary satellites
What and Where?
The global positional system is a network of 24 satellites that use atomic clocks to record its time and position above the Earth.
When and Who?
GPS was started in the 1960s for militarty intelligence by the US Navy but was opened for public usage in the late 1980's. [1]
Why?
To assist with navigation.
How?
The receiver uses the data from 4 satellites to triangulate an objects position on Earth's surface.
Who? What? When? Why? Where? & How?
Figure 2
Positive Effects
The list is endless in terms of use for navigation: tourism, hiking, shipping, farming, etc



Negative Effects
A resent article, by The Walrus, suggests that with the dependency on GPS, our brains may not develop cognitive mapping skills and lose our sense of direction. [2]
Effects on Society
Show that for a GPS satellite at an altitude of 20 000km, it must be travelling 14 km/h.

Modelling with Equations
Figure3 :Before and after imagery of Amazon deforestation. [3]
Positive Effect
Aerial views of terrain make it possible to evaluate conservation efforts and assist in strategy planning. [3]

Negative Effect
Electronic 'wastes' left behind in the space environment as well as the ecosystem on Earth.
Evironmental Implications
GPS: Global Positioning System
STSE Project Exemplar for SPH 4U by Lisa Drekic
One negative implication to GPS
The US government has developed the GPS system. As every day passes, people globally depend more and more on the use of this technology. Should one country have right to a global project?

Solution to this Concern
I feel the project should be a global collaborative project with input from several countries. Success in this model has been seen in the Cern particle accelerator and ITER, the nuclear fusion plant.
Big Brother is Watching
Links: Careers and Scientists
Figure 5: Albert Einstein
Careers Link: Software Engineer [4]
A software engineer is a skilled professional focused on the design and creation of software.
Successful Software Engineers need to know basic business functions, have a firm understanding of design methodology, and excellent communication skills.
Usually requires at least a BS in Computer Science.
Scientist Link: Albert Eistein
Albert Einstein is a famous physicist and his work in Special and General Relativity greatly influenced GPS satellites. The atomic clocks used on the satellites must be adjusted since they are in a different gravitational field and travelling at extreme speeds compared to the clocks on Earth.

[1] http://www.mio.com/technology-history-of-gps.htm

[2] http://thewalrus.ca/global-impositioning-systems/

[3] http://www.gps.gov/applications/environment/

[4] http://jobsearchtech.about.com/od/careersintechnology/p/SWEngineer.htm
Many Thanks!
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