What You Need to Know about GNSS

Satellite in outer spaceGNSS or otherwise known as Global Navigation Satellite System aims to provide autonomous geospatial placement with comprehensive coverage. According to the Princeton University, GNSS is often applied in several applications and commonly uses GPS, Galileo, GLONASS, Beidou, and other regional systems to function.

But just like any other type of system, there are several errors inherent in the system. Although using a GNSS simulator can help you deal with the errors, it’s also important to learn a few of them to fully understand how the system works.

Here are some of the most common system errors:

Space segment errors

Space segment errors are either caused by errors in the clocks carried by both satellites or the actual positioning of the global satellites themselves. Even the most basic of all satellite clock errors can create severe inaccuracies when it comes to navigation. Although the clocks found in each global satellite in any of the GNSS constellations are highly accurate, there are instances that it can adrift from its course.

Control segment errors

Control segment errors are separated into three basic types which are navigation data errors, ephemeris prediction errors, and ionospheric prediction errors. All errors commonly originate in the control sector which often results in inaccuracies. If the control center chooses an incorrect positioning, then the bit-level error may be severe.

User segment errors

This type of error commonly occurs in the actual receiver and often includes inaccurate compensation for both tropospheric and ionospheric delay, as well as other fundamental design flaws.

One way to prevent these errors is by conducting repeated tests to ensure that it can accurately respond to errors and produce accurate results. Using a simulator is a great way to conduct tests and ensure its accuracy.