5.2.6. GPS Accuracy and Precision

Try these first

1. 1.

   What does GPS accuracy refer to?

   Hint

   Think about how you can measure distance.

2. 2.

   How does observation time affect GPS accuracy?

   Hint

   Consider what happens to data over time.

3. 3.

   What does GPS accuracy measure?

   • The speed of the GPS
   • Closeness to true position
   • The price of GPS receivers

   Hint

   Think about what 'accuracy' means generally.

4. 4.

   Longer observation times usually lead to better GPS accuracy.

   Hint

   Consider how gathering data for longer might affect reliability.

5. 5.

   Given a scenario where a GPS survey is performed in an urban area with reflective buildings, how would you approach ensuring accuracy?

   Hint

   Think about technology that provides corrections.

6. 6.

   Analyze how different PDOP configurations influence GPS accuracy in different terrains. Why is it critical to monitor PDOP during a surveying campaign?

   Hint

   Consider the impact of satellite arrangement.