Labs 9_2017.-1.docx - DEPARTMENT OF GEOGRAPHY UNIVERSITY OF...

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DEPARTMENT OF GEOGRAPHY UNIVERSITY OF FLORIDA PHYSICAL GEOGRAPHY LAB. - GEO 2200L Lab 9: GPS Total: 40 points http://www.colorado.edu/geography/gcraft/notes/gps/gps.html http://www.howstuffworks.com/gps.htm http://www.geocaching.com/ 1. What does the acronym GPS stand for and what does the GPS system do? (2 points) GPS stands for Global Positioning System, it allows its users to tell where they and other landmarks are located. 2. List the three segments of GPS and briefly explain each segment. (6 points) Space segment: this consists of a constellation of satellites transmitting radio signals to users. Control segment: This is made up of ground facilities that track the GPS satellites, monitor their transmissions, perform analyses, and send commands and data to the constellation. User Segment- consists of the GPS receivers and the user community. GPS receivers convert SV signals into position, velocity, and time estimates. Four satellites are required to compute the four dimensions of X, Y, Z (position) and Time. GPS receivers are used for navigation, positioning, time dissemination, and other research. 3. By whom and why was it developed? (2 points) The Department of Defense during the cold war in response to USSR’s Sputnik.
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