4.15. Challenges and Limitations of GNSS in Civil Applications

Try these first

1. 1.

   What does signal obstruction refer to in GNSS?

   Hint

   Think about what could block a radio signal.

2. 2.

   How many satellites need to be visible for accurate positioning?

   Hint

   Remember the rule of four.

3. 3.

   What is a consequence of signal obstruction?

   • Increased accuracy
   • Inaccurate positioning
   • No effect

   Hint

   Think about whether blocked signals can help or hinder positioning.

4. 4.

   True or False: Atmospheric conditions do not affect GNSS signal accuracy.

   • True
   • False

   Hint

   Consider if weather can impact other types of signals.

5. 5.

   Analyze a GNSS positioning report that shows high DOP values. What might this indicate about the satellite configuration?

   Hint

   Consider what the position of satellites tells you about reception.

6. 6.

   Create a scenario where atmospheric disturbances impact a GNSS-based project. How can engineers design their project to mitigate effects?

   Hint

   Think about what steps can be taken before. What tools can help?