4.6.1. Concept

Try these first

1. 1.

   What does DGPS stand for?

   Hint

   Think about how it relates to GPS.

2. 2.

   What is the primary role of a base station in DGPS?

   Hint

   Consider what a base station must know.

3. 3.

   What does DGPS enhance in GPS?

   • Positioning accuracy
   • Signal strength
   • Frequency
   • Data collection

   Hint

   Think about what DGPS is meant to do.

4. 4.

   True or False: The base station in DGPS knows its exact location.

   • True
   • False

   Hint

   What is required for the base station to function correctly?

5. 5.

   A DGPS base station is at coordinates 40.7128° N, 74.0060° W. If the rover shows a reading of 40.7131° N, what is the likely error in the rover's positioning?

   Hint

   Consider how GPS readings can drift due to atmospheric or signal delays.

6. 6.

   Discuss how you would set up a DGPS system for a coastal survey to maximize accuracy. Include considerations for equipment, location, and potential signal interferences.

   Hint

   Think about environmental factors that could obstruct satellite signals.