The characteristics and capabilities of GPS receivers influence the techniques available to the user throughout the work, from the initial planning to processing. There are literally hundreds of different GPS receivers on the market. Aside from recreational receivers, all are generally capable of accuracies from sub‑meter to sub‑centimeter. They are capable of differential GPS, DGPS, real-time GPS, static GPS and other hybrid techniques. They usually are accompanied by post‑processing software and network adjustment software. And many are equipped with capacity for extra batteries, external data collectors, external antennas, and tripod mounting hardware. Just as there are many types of GPS receivers, there are many ways to apply them in obtaining GPS positions. Each of these several very different techniques makes unique demands on the receivers used to support it.
This lesson is about those techniques and the fundamentals of GPS receivers.
At the successful completion of this lesson, students should be able to:
- recognize the basic functions of the common features of GPS receivers, the antenna, the preamplifier, the RF section, the microprocessor, the CDU, the storage and the power;
- recognize some of the important issues in choosing a GPS receiver;
- discuss some of the trends in receiver development;
- explain some GPS surveying methods;
- demonstrate static;
- explain differential GPS. DGPS;
- explain kinematic;
- describe pseudokinematic;
- identify rapid-static;
- define on-the-fly; and
- recognize real-time-kinematic.
If you have any questions now or at any point during this week, please feel free to post them to the Lesson 4 Discussion Forum. (To access the forum, return to Canvas and navigate to the Lesson 4 Discussion Forum in the Lesson 4 module.) While you are there, feel free to post your own responses if you, too, are able to help out a classmate.