GPS systems work by using signals from satellites orbiting the Earth. A GPS receiver calculates its location by timing the signals sent by multiple satellites and triangulating its position based on their known locations in space.
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MCQs
1. How many satellites are part of the GPS constellation?
A) 12
B) 24
C) 36
D) 48
Answer: B) 24
Explanation: The GPS is made up of a constellation of at least 24 satellites, ensuring that at least four satellites are visible from any point on the Earth’s surface at any time.
2. What is trilateration in GPS technology?
A) Calculating distance using three or more satellites
B) Transferring data between satellites
C) Triangulating position using two satellites
D) Tracking movement speed
Answer: A) Calculating distance using three or more satellites
Explanation: Trilateration is a method used in GPS technology to determine the position of a receiver by calculating the distance between the receiver and three or more satellites.
3. Who operates the Global Positioning System?
A) The European Space Agency
B) The International Telecommunication Union
C) The United States Department of Defense
D) The United Nations
Answer: C) The United States Department of Defense
Explanation: The Global Positioning System is operated by the United States Department of Defense. It was originally developed for military applications but was later made available for civilian use.
4. What other information can a GPS device provide besides location?
A) Only location
B) Location and altitude
C) Location, altitude, and weather
D) Location, altitude, weather, and time
Answer: B) Location and altitude
Explanation: A GPS device can provide both location and altitude information. While GPS also provides accurate time, specific devices may or may not display weather information as it’s not a direct GPS function.
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