Figure 5-2. GPS-S Network Design
d. Determine a Global Positioning System Survey Technique. After a GPS network has been
designed and laid out, a GPS-S technique needs to be considered. Choose the most efficient method--
one which minimizes time and cost while still providing the necessary accuracy requirements of a given
project. Once a technique is chosen, the equipment requirements, observation schedules, session's
designations, and planning functions can be determined.
e. Determine the Type of Global Positioning System Instrumentation. The type of GPS
instrumentation used on a project depends on the accuracy requirements, the GPS-S technique, the
project size, and economics. Dual-frequency receivers are recommended as baseline lengths approach
or exceed 50 kilometers. The length may also vary depending on the amount of solar activity during the
observation period. Using a dual-frequency receiver permits the user to solve
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EN0593
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