Questions and Answers
What does GPS stand for?
global positioning system
What is GPS?
a system of satellites orbiting the earth and transmitting distances from the location of the satellites to a receiver
How many satellites are in the GPS system?
27 (24 are active, 3 are backups)
How does 2D trilateration work?
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How does 3D trilateration work?
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What two things do GPS receivers need to do in order to find a location?
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What do more accurate GPS units do?
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Why is knowing how to use GIS important for someone interested in environmental systems?
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What does a GIS specialist do?
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What is trilateration?
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What can GIS data do?
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How do maps make things better?
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Study Notes
GPS Overview
- GPS stands for Global Positioning System, a technology for determining precise locations on Earth.
- The system consists of 27 satellites, with 24 functioning satellites and 3 backups in orbit around the Earth.
Trilateration Techniques
- 2D trilateration uses distances from three satellites to draw intersecting circles, identifying the receiver's exact location.
- 3D trilateration extends this concept to three dimensions, where distance measurements from satellites create intersecting spheres.
GPS Functionality
- GPS receivers need to connect with at least four satellites to accurately calculate their location by measuring the distance to each one.
- More advanced GPS units can detect and utilize signals from a greater number of satellites, improving location accuracy.
GIS Importance and Application
- Proficiency in GIS (Geographic Information Systems) is crucial for those interested in environmental studies due to the high demand for accurate mapping and data visualization in the field.
- GIS specialists utilize software to create environmental maps and analyze various data-related aspects, crucial for environmental management and planning.
Data Utility and Visualization
- GIS can layer various data types, such as population growth, air pollution levels, and temperature fluctuations, enhancing analysis capabilities.
- Maps created through GIS improve the visualization of environmental issues, making complex data easier to understand and act upon.
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Description
Test your knowledge on GPS terminology and concepts with these flashcards. Learn about the global positioning system, the number of satellites involved, and the trilateration process. Perfect for students and professionals interested in geographic information systems.