GEOG 862
GPS and GNSS for Geospatial Professionals

Lesson 7 Overview



Static GPS/GNSS, where the receiver is stationary, is the original GPS/GNSS method. It is still the preferred approach for establishing the most accurate positions, the control. In many ways. For example, some processing and data checking should be performed on a daily basis during a GPS/GNSS project. Blunders from operators, noisy data, and unhealthy satellites can corrupt entire sessions. In any case, left undetected, such dissolution can jeopardize an entire project.  These weaknesses in the data can sometimes be prevented before they happen by best practices such as optimization of the observation schedule. GPS/GNSS measurements are still composed of fundamentally biased ranges. Therefore, the goal remains to mitigate the biases and extract the true ranges. In this lesson, we start to get into the real details of how static GPS/GNSS work is done.


At the successful completion of this lesson, students should be able to:

  • discuss the difference between precision and accuracy
  • discuss the basics of planning a static GPS/GNSS survey;
  • recognize the role of NGS control;
  • explain Continuously Operating Reference Stations;
  • explain Static GPS/GNSS project design;
  • demonstrate drawing GPS/GNSS baselines
  • describe the difference between dependent and independent baselines;
  • describe how to calculate the number of sessions necessary for a static survey;
  • discuss some of the components of Static GPS/GNSS control such as equipment, station data sheets, visibility diagrams, monumentation and logistics


If you have any questions now or at any point during this week, please feel free to post them to the Lesson 7 Discussion Forum. (To access the forum, return to Canvas and navigate to the Lesson 7 Discussion Forum in the Lesson 7 module.) While you are there, feel free to post your own responses if you, too, are able to help out a classmate.