5. Geophysics and Remote Sensing

Geodesy And Gps — Quiz

Test your understanding of geodesy and gps with 5 practice questions.

Practice Questions

Question 1

Which space geodetic technique uses radar satellites to measure surface deformation by comparing interferometric phase differences?

Question 2

In Precise Point Positioning (PPP), what is a key requirement that differentiates it from Differential GNSS methods?

Question 3

Which GNSS observable provides the highest precision for positioning measurements?

Question 4

A GNSS receiver has a horizontal coordinate RMS repeatability of 3\,mm. What is the approximate 95\% confidence level for horizontal precision?

Question 5

Which horizontal datum is directly realized by GPS satellite positions and commonly used for consumer and geodetic applications?