GPS Unit Review

What does GPS stand for?

• Global Positioning System
• Global Positioning Satellites
• Global Positioning Software
• Global Phone System

How accurate can a GPS locate a person?

• Within an arms length
• Within 20 feet
• Within 1 mile
• Within 1 kilometer

Which form of communication does not require a satellite?

• Cell phone
• Google Earth
• FM station
• they all require a satellite

How many times does one satellite orbit the Earth in a day?

• One time
• Three times
• Two times
• Four times

The GPS satellites emit navigation signals

• Only when needed
• Only when orbiting the USA
• 24 hours a day
• When you turn on a GPS system

How many GPS satellites orbit the moon

• Less than 24
• More than 24
• 24
• None

Your hand held GPS communicates with

• other GPS units
• other satellites
• the GPS station
• with you

How do satellites synchronize communications

• atomic clocks
• they don't 
• GPS station
• with their software

How does a GPS receiver tell how far away a satellite is from it

• the time difference between them
• it always flies the same height
• that is not necessary
• all three answers

The Geometric Principle to locate an item using radius of circles

• Triangulation
• Tangent
• Using a compass
• I don't know but can I still get the points? :D