Welcome Students! Where is Here? N W E

Welcome Students! Where is Here? N W E

Welcome Students! Where is Here? N W E S

Earths Grid Equator: line that divides the Earth into Northern and Southern hemispheres. Prime Meridian: line that divides the Earth into Eastern and Western hemispheres. Latitude: measures North or South of the Equator

Latitude Lines run East West Latitude ~ Fatitude Longitude: measures East or West of the Prime Meridian. Longitude lines run North South

What is GPS? You Are Here Hand held device used to communicate with the satellites.

The location is given in longitude and latitude coordinates. Communication The GPS handheld receiver uses radio waves to talk to the

satellite and find its location. Trilateration: using a set of 3 points or more to find the location of an unknown point. Ft. Collins Satellite 1 Satellite 2

Longmont Boulder Denver Satellite 3 ? ?

State 1 = Minnesota State 2 = Colorado State 3 = Missouri Satellite 1

13 cm Satellite 1 11 cm Satellite 1 16 cm Satellite 2

11 cm Satellite 2 17.2 cm Satellite 2 13 cm

Satellite 3 15 cm Satellite 3 9 cm Satellite 3 13.4 cm

Satellite 4 13.7 cm Satellite 4 16 cm Satellite 4

10.5 cm How far??? GPS receivers use time to know how far away the satellites are. Example: Lightening and Thunder in a storm. How Far?

GPS satellites measure distance using the speed of light Light travels at 186,000 miles per second If it takes a signal 10 Seconds to travel from a GPS receiver to a GPS satellite, how far apart are they? 10 seconds x 186,000 miles per second = 1,860,000 miles The sun is 93,000,000 miles awayhow long do you think it takes the light from the sun to reach Earth??? 93,000,000 186,000 = 8 minutes! Bringing it all together Latitude and Longitude let us know

exactly where we are. GPS can be used to tell us where we are on Earth GPS uses time to find distance Why is GPS so important??? Car

Tracking Packages Boat Airplane Geocaching

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