GPS Overview TEC7132 April 2004 What is GPS? Radio-based navigation system developed by DoD Initial operation in 1993 Fully operational in 1995 System is called NAVSTAR NAV igation with S atellite T iming A nd R anging Referred to as GPS
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range = time delay X speed of light
Measure time difference between the same part of code
Series of ones
and zeroes repeating
every 1023 bits. So
Complicated alternation of bits that pattern looks random thus called
22,000 Km radius
20,000 Km radius
Located at one of these 2 points.
However, one point can easily
be eliminated because it is either
not on earth or moving at impossible
rate of speed.
21,000 Km radius
Some common GPS devices used by FWS:
Accuracy given in meters
(10 meters or sub-meter)
Integrate GPS with GIS
Custom forms for data collection
Next offering: September 1-3, 2004