Selecting GNSS Constellations

our SecureSync is capable of tracking multiple GNSS constellations simultaneously.

To verify if satellite signals for the selected GNSS constellations are currently received, see Determining Which GNSS Satellites Are Received.

Configuring GNSS Constellations

To configure which GNSS constellations SecureSync's GNSS receiver shall track:

  1. Navigate to INTERFACES > REFERENCES: GNSS Reference.
  2. Click the GEAR button next to GNSS 0. The GNSS 0 window will open:

  3. Under Selected Constellations, review which constellations are currently tracked, and apply your changes. Note the following:
    • The u-blox M8T receiver is capable of receiving multiple GNSS constellations simultaneously; the table below shows which combinations are possible:
      GPSGalileoGLONASSBeiDou
      XX––
      XXX–
      XX–X
      X–X–
      X––X
      –XX–
      –X–X
      ––XX

      Note: The augmentation system SBAS and QZSS can be enabled only if GPS operation is enabled.

      Note: Should you select more than 3 + QZSS constellations, you will receive a Constellation Error once you click Submit (ConstError).

QZSS is enabled by default if GPS is enabled. To avoid cross-correlation issues, u-blox recommends that GPS and QZSS are always both enabled or both disabled. While it is possible to enable GPS without QZSS, the reverse is not recommended and not possible through the Web UI.

QZSS is not considered a standalone, global system, but is instead a regional system (Japan). You must be located in Japan (or using a GNSS simulator) to properly receive QZSS signals.

Satellite Based Augmentation Systems (SBAS) is an augmentation technology for GPS integrity. To use SBAS correction, you must enable GPS tracking.