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FAQs
GPS
What is GPS?
How does it work?
How does the GPS receiver calculate its location?
From the fix how is the position calculated?
Who Uses GPS?
What are the different kinds of service levels provided by GPS?
How accurate are these signals?
What is SA?
Why was Selective Availability (SA) introduced and can one depend on these signals?
What are the different reasons the GPS signal could degrade?
Are there any special charges for using this service?
What is DGPS?
What are the various sources of DGPS?
   
   
   
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