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GNSS Technology Quiz

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Questions and Answers

What is the basis for GNSS positioning?

Trilateration using ranging from multiple satellites (correct)

Time synchronization with multiple satellites

Differential correction from ground stations

Triangulation using angles from multiple satellites

How many satellites are usually needed for GNSS receivers to fix position in 3D space?

6 satellites

3 satellites

4 satellites (correct)

5 satellites

What does GNSS stand for?

Geospatial Navigation and Synchronization System

Global Network of Satellite Stations

Geographic National Security System

Global Navigation Satellite System (correct)

What is the speed of radio waves, as used in GNSS, in meters per second?

$3.0 \times 10^8$ Signup and view all the answers

What is the purpose of using Differential GNSS?

To improve accuracy by correcting signal errors Signup and view all the answers

What is the role of GBAS in GNSS?

To provide precision approach and landing guidance for aircraft Signup and view all the answers

What is the main purpose of SBAS in GNSS?

To improve the accuracy and integrity of basic GNSS signals Signup and view all the answers

What is the purpose of calculating successive ranges for multiple satellites in GNSS?

To use trilateration to fix position in 3D space Signup and view all the answers

What is the minimum number of satellites needed for satellite 'triangulation' in GNSS?

3-4 satellites Signup and view all the answers

What is the main difference between trilateration and triangulation in the context of GNSS?

Trilateration uses distance measurements, while triangulation uses angle measurements Signup and view all the answers

What is the primary advantage of having more satellites in GNSS?

Better location accuracy Signup and view all the answers

What is the main purpose of technologies for indoor positioning in the context of GNSS?

To provide accurate location information within indoor environments Signup and view all the answers