Tooltips

RTKLIB is an open-source set of tools for GNSS applications. It’s very popular as free tool for PPK postprocessing

It’s a standard language or protocol to exchange GNSS correction data

RINEX is a standard format to store raw satellite measurements without position information

QZSS is the japanese satellite navigation system, and is only deployed over Japan

PPK stands for Post-Processed Kinematics. You can calculate a GPS position realtime, or store only satellite data to later postprocess (PPK) the positions.

It’s a standard language or protocol to exchange correction data over internet

It’s one of the possible sources of errors in GPS receivers. Multipath is when you receive the same signal directly, or reflected by a for example a building. This affects the accuracy of your GPS receiver.

It’s a standard language or protocol to exchange location data between a GPS receiver and a computer

Mock location feature of Android devices enables you to manually change the location of your device to any other place. In the case of ArduSimple devices, it enables the GPS collector apps to get the GPS observations directly from the external receiver instead of the internal GPS of the unit

Global Navigation Satellite System, it’s the technical word to refer to all satellite navigation systems together: GPS, Galileo, GLONASS, BeiDou, etc