Virtual Labs

a: It uses two receivers, one at a known location and one at an unknown location b: It is only available to professionals c: It is less accurate than GPS d: All of these

What is the biggest source of error for a DGPS?

a: Signal multi-pathing b: Refraction in the ionosphere and troposphere c: Receiver clock error d: Orbital errors

About what is the accuracy for a handheld GPS (with DGPS and WAAS) you might go out and buy?

a: Tens of meters horizontally, tens of meters vertically b: Centimeters horizontally, millimeters vertically c: Meters horizontally, a few tens of meters vertically d: Centimeters horizontally, meters vertically

What does GPS stand for?

a: Global Positioning System b: Going Places Sometimes c: Government Positioning Satellites d: Global Positioning Satellites

What kind of information does a GPS satellite transmit to the GPS receiver?

a: The time the message was sent b: The location of the GPS satellite c: All of these d: The orbital information for all the other GPS satellites in the fleet

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