Podcast
Questions and Answers
What year did the government make the Global Positioning System available for civilian use?
What year did the government make the Global Positioning System available for civilian use?
GPS works only during clear weather conditions.
GPS works only during clear weather conditions.
False
How high above the Earth do the GPS satellites orbit?
How high above the Earth do the GPS satellites orbit?
12000 miles
The GPS receiver calculates the user's exact location by taking information transmitted from the __________.
The GPS receiver calculates the user's exact location by taking information transmitted from the __________.
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Match the type of GPS device with its primary usage:
Match the type of GPS device with its primary usage:
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Which type of GPS device is specifically designed for aviation enthusiasts?
Which type of GPS device is specifically designed for aviation enthusiasts?
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GPS devices can only provide information on location but do not display maps.
GPS devices can only provide information on location but do not display maps.
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What do Marine GPS Devices assist with?
What do Marine GPS Devices assist with?
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What is the primary function of GPS Trackers?
What is the primary function of GPS Trackers?
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Wearable GPS devices can be used for tracking pets.
Wearable GPS devices can be used for tracking pets.
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What is one cause of error in GPS measurements?
What is one cause of error in GPS measurements?
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1G technology was introduced in the ________.
1G technology was introduced in the ________.
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Match the following generations of mobile communications with their key features:
Match the following generations of mobile communications with their key features:
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Which generation of mobile technology was completed in the 1990s?
Which generation of mobile technology was completed in the 1990s?
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What is a significant feature of 5G technology?
What is a significant feature of 5G technology?
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The clock in a GPS receiver is as accurate as atomic clocks.
The clock in a GPS receiver is as accurate as atomic clocks.
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5G technology has lower data transmission speeds compared to 4G technology.
5G technology has lower data transmission speeds compared to 4G technology.
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What defines wireless communication?
What defines wireless communication?
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In what decade did the implementation of 5G technology start?
In what decade did the implementation of 5G technology start?
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5G supports the __________, which is known as the wireless world wide web.
5G supports the __________, which is known as the wireless world wide web.
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Match the following generations of mobile communications with their characteristics:
Match the following generations of mobile communications with their characteristics:
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Which of the following is a drawback of 1G technology?
Which of the following is a drawback of 1G technology?
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2G technology was launched in 1991 in Finland.
2G technology was launched in 1991 in Finland.
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What was the maximum data speed of 2G technology?
What was the maximum data speed of 2G technology?
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3G technology was introduced in the year _____ .
3G technology was introduced in the year _____ .
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Which feature is NOT associated with 3G technology?
Which feature is NOT associated with 3G technology?
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Match the following generations of mobile technology with their key features:
Match the following generations of mobile technology with their key features:
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4G technology began in the late _____ .
4G technology began in the late _____ .
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One major drawback of 4G technology is that it has a low battery use.
One major drawback of 4G technology is that it has a low battery use.
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Study Notes
Global Positioning System (GPS) and Assisted-GPS
- GPS is a satellite-based navigation system
- The system consists of 24 satellites in orbit
- The first satellite was launched in 1978
- The system was made available for civilian use in 1980
- GPS works 24 hours a day, in any weather condition, anywhere in the world
- The satellites orbit Earth at approximately 12,000 miles
- GPS signals transmit on two frequencies: L1 and L2
GPS Devices
- Handheld GPS devices are portable and can be carried or attached to backpacks, used for outdoor activities like hiking, camping, and geocaching
- In-car GPS devices are designed for vehicles, provide turn-by-turn directions, real-time traffic updates, and other features
- GPS watches are designed for athletes and fitness enthusiasts and can track distance, pace, and other workout metrics
- Aviation GPS devices are for pilots and aviation enthusiasts, providing real-time flight data including altitude, speed, and location
- Marine GPS devices are for boats and ships, providing navigational data such as depth, water temperature
- GPS trackers are small and portable, attached to vehicles, pets, or other objects. They track the location in real-time
How GPS Works
- GPS satellites circle the Earth twice a day in a precise orbit, transmitting signal information
- GPS receivers take this information and use it to calculate the user's exact location
- The receiver determines and displays the location on an electronic map
GPS Errors
- Signal reflection can occur when a signal bounces off objects like buildings or rocks
- Satellite shading can prevent the signal from working properly if satellites are not positioned at a wide enough angle
- A receiver's clock may not be as accurate as the satellites' atomic clocks, leading to timing errors in calculations
1G, 2G, 3G, 4G, 5G Mobile Communications
- Wireless is defined as "having no wires"
- Computer networks without physical connections use radio or microwaves for communication
- 1G technology was introduced in the 1980s and used analog signals; initial speed was up to 2.5kbps (limited to voice calls within a single city)
- 1G drawbacks: no security, poor reliability, poor battery life, large size, poor voice quality
- 2G uses GSM (global system for mobile communication), digital signals, and had a data speed up to 64kbps; enabled text messages, picture messages, and MMS
- 3G technology (introduced in the 2000s) increased bandwidth and data transfer rates; had a data speed from 144kbps to 2 Mbps; could support web-based applications, audio, and videos; had large capacities
- 3G drawbacks: expensive licenses, infrastructure challenges, high bandwidth requirements, expensive phones and large cell phones
- 4G (late-2000s) offered significantly increased data speed (100Mbps-1Gbps), mobile multimedia capability, global mobility, and integrated wireless solutions, known as mobile broadband everywhere
- 4G drawbacks: higher battery use, significant implementation challenges, costly equipment, and complex hardware
- 5G (late-2010s) is highly supportable to the WWW (wireless world wide web) and offers complete wireless communication with no or minimal limitations; has high capacity and high speed, supports high-quality data transmission and high-speed data transmission
- There are differences between 3G and 4G in bandwidth, use of broadband, technology, speed and data transfer rates.
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Description
This quiz provides an overview of Global Positioning System (GPS) technology and its various applications. Learn about the satellite system, the types of GPS devices available, and how they are used in different fields like navigation, fitness, and aviation. Test your knowledge about the evolution and functionality of GPS.
