The GalTeC Reference module is composed of two components:
1. The (precise) Reference Orbit Determination and Time Synchronization (OD&TS) components.
2. The User Reference Data Processing performing PVT determination and Integrity Processing (RAIM and User Integrity Monitoring) 

The inputs for the Reference Module are GNSS raw data from Monitoring Stations in RINEX formats.
The output of the Reference Module is applied to the GalTeC Analysis module for further analysis and visualization.

The GalTeC component provides precise GNSS (GPS, GLONASS and Galileo) reference orbits and precise satellite clocks for further analysis and processing. The OD&TS software provides the following major functions:

• Precise GPS, GLONASS and Galileo/Giove Orbits (post processed)
• Precise GPS, GLONASS and Galileo/Giove Clock/Time (post processed)
• Worst User Location (WUL) for Global and Local Areas Determination
• Derived Reference SISRE
• Bounding of SISRE with SISRA
• Performance Assessment of URA for GPS and SISA/SISMA for Galileo
• Single and Dual Frequency Measurement Processing
• Processing and Combination of Data from Various Receiver Types in the Same Processing Step
• Supported international input/output formats: RINEX, SP3c, SINEX, IONEX, Clock RINEX, Troposphere SINEX, ANTEX, IERS ERP etc.

In the User Data Processing the performance in user domain is analysed, i.e. PVT solutions can be performed based on the raw measurements and ephemeris records from monitoring stations. Also it is possible to use precise GNSS satellite orbits and clocks instead of the broadcast ones. The main functions of the User Data Processing are:

• Decoding GPS/GLONASS/GALILEO Broadcast Ephemeris
• Performing Position/Navigation Solutions Using Different GNSS SIS Codes (L1 C/A, L1P-L2P, E1 and E5) Raw Measurements and Combinations
• Computation of Protection Levels based on RAIM and Other User Integrity Monitoring Methods
• Computation of Range Residuals at User Levels

The function and data stream are shown in the following diagram.