Understanding GPS Technology

The video tutorial explains the intriguing technology of GPS, starting with its creation by the US Department of Defense in 1978. Initially, GPS was controlled by the US, with limited accuracy for civilians. However, during the Gulf War, the US had to release a more precise signal for civilian use. The tutorial further explains how GPS works using geometry and time signals from satellites to determine location. It concludes with the global expansion of GPS systems by other countries, ensuring ample space for new satellites.

Who initiated the creation of the GPS system?

• Russian Space Agency

• European Space Agency

• The United States Department of Defense

• NASA

How many satellites are involved in the GPS system?

• 18

• 30

• 12

• 24

What was the initial accuracy of the GPS for civilians?

• 200 meters

• 100 meters

• 50 meters

• 10 meters

What was the main reason for the initial limited accuracy of the GPS for civilians?

• Technical limitations

• Cost issues

• Security reasons

• Lack of demand

Why did the U.S. Department of Defense have to buy civilian GPS receivers during the Gulf War?

• There were not enough military GPS receivers

• They were more accurate

• They were cheaper

• They were easier to use

What additional information does GPS provide besides location?

• Weather conditions

• Speed

• Temperature

• Height

What geometric concept is used to determine the exact location using GPS?

• Rectangles

• Squares

• Circles

• Triangles

How does the GPS calculate the distance from the satellite?

• By triangulating with other satellites

• By using the satellite's altitude

• By using the time difference between the satellite and the GPS receiver

• By measuring the signal strength

What is the significance of the time difference between the satellite and the GPS receiver?

• It helps in determining the speed of the receiver

• It helps in calculating the distance to the satellite

• It helps in identifying the satellite

• It helps in synchronizing the clocks

Which countries are developing their own geo-location systems?

• Russia, Europe, and China

• Mexico, Argentina, and South Africa

• Canada, Australia, and South Korea

• India, Japan, and Brazil