Single-Band GNSS Receivers with Extremely High Stability of 4.5ns

Furuno Electric has developed the GT-88 - GNSS Timing Module and GF-8801/02/03/04/05 - GNSS Disciplined Oscillators, for users who require UTC time-synchronized signals to meet the new 5G requirements. The GT/GF-88 series provide UTC time-synchronized timing signals (1PPS/10MHz) by receiving GNSS signals from the satellites. They achieve a stability even better than atomic clocks made from rubidium. The GT/GF-88 series uses a new algorithm called Dynamic Satellite Selection, that provides outstanding multipath mitigation, especially in urban canyon environments. This algorithm was developed by Nippon Telegraph and Telephone Corporation (NTT) based in Tokyo, Japan.

Key Features of the GNSS Disciplined Oscillators :

  • Extremely high stability of 4.5ns (1 sigma) is obtained, only requiring reception of the L1 band (1575.42 MHz) frequency GNSS satellites. It was achieved by improving advanced position estimation algorithms and optimizing position calculation among several different GNSS satellite constellations. It allows users to achieve 5G-required performance without any changes to existing single-band GNSS antennas.
  • They incorporate the Dynamic Satellite Selection, an advanced multipath mitigation algorithm developed by NTT. Normally typical time synchronization performance deteriorates in urban canyon environments by the effect of multipath. The Dynamic Satellite Selection reduces this time error by one-fifth. This provides more flexibility when installing GNSS antennas. Consequently, the GT/GF-88 series now permits GNSS antennas to be mounted on walls, windows of tall buildings and other difficult reception environments.
  • The GT/GF-88 series continues to support GPS, GLONASS, and QZSS satellite constellations, and now adds Galileo support. As the total number of satellites available increases, operational stability also increases.

Click here for more information about GNSS Timing Module GT-88 and GNSS Disciplined Oscillator GF-8801/02/03/04/05.

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