GPS THE GLOBAL POSITIONING SYSTEM. What is GPS? GPS is a satellite-based radio navigation system...
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Transcript of GPS THE GLOBAL POSITIONING SYSTEM. What is GPS? GPS is a satellite-based radio navigation system...
![Page 1: GPS THE GLOBAL POSITIONING SYSTEM. What is GPS? GPS is a satellite-based radio navigation system that allows anyone anywhere on the planet to determine.](https://reader031.fdocuments.us/reader031/viewer/2022013115/56649f045503460f94c17f23/html5/thumbnails/1.jpg)
GPSTHE GLOBAL POSITIONING
SYSTEM
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What is GPS? GPS is a satellite-based radio
navigation system that allows anyone anywhere on the planet to determine their 3D position with great accuracy and precision.
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– Department of Defense (DOD) – NAVSTAR
– Russia GLONASS
– European Economic CommunitySystem Under development
Who maintains GPS?
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The system is composed of three segments
– Space - The orbiting satellites
– Control - The monitoring stations on earth
– User - The GPS units such as you will use today.
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Garmin eTrex
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When was GPS first used?–Sputnik…1957–TRANSIT…1960’s–NAVSTAR…1970’s
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– 27 at the current time – 24 to maintain a system
How many satellites make up a GPS?
Your GPS receiver must track at least 3 satellites to give you an accurate position location.
*The word “tracking” must appear on the screen
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– Government Military Agencies - Conservation, Weather, Rescue
– Industry Transportation Fishing Agriculture
– General Public Recreation Emergency / Security Reasons Health Related Reasons
Who uses GPS?
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– Each GPS satellite transmits an accurate position and time signal.
– The user’s receiver measures the time delay for the signal to reach the receiver.
– Measurements collected from 4 satellites are processed to solve for the 3D position, velocity and time.
How does GPS Work?
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Where on Earth are we?
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Your Task Outside
1) Get a locked reading on your unit. 2) Chose a direction either east-west, or north-south.3) Walk along the direction vector until the reading on your unit changes.
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What you discovered outside.
1) Did you all get the exact same reading?2) How did you know your direction?3) How many paces until the reading on your unit changed?