Lecture GPS1 - Lecture GPS #1 Text Coverage: Lecture Notes...

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Lecture GPS #1 Lecture Notes Text Coverage: Wolf and Ghilani: Study: Ch 13: 1-3, 5.1 Problems: 13: 1 – 13. NAVSTAR Constellation: Further GPS material is available at Peter Dana’s website: The Geographer's Craft Project - Main Page . You can select “ lecture and discussion notes ” and find a good presentation on GPS . 1. GPS was created by the U.S. Defense Department to assist our military operations. The civilian sector found that it could use the signals without decoding the military code, and civilian use has grown during the 1980s and 1990s. Today, civilian use is beginning to outweigh military applications. For example, in early 2000 President Clinton, deactivated what was known as “selective availability S/A”. The military purposely degraded the GPS signals, making a single position uncertain by up to 200 meters when S/A was turned on. S/ A was applied at random times, so civilian users could never count on more accurate locations. However, now, S/A is turned off giving all users 3 – 10 meter accuracy for a simple position measurement. 2.
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This note was uploaded on 05/19/2011 for the course GEM 3330 taught by Professor Gibson during the Spring '11 term at University of Florida.

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Lecture GPS1 - Lecture GPS #1 Text Coverage: Lecture Notes...

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