Model GT-100

• NEW

They support GPS, GLONASS, Galileo, BeiDou, QZSS and SBAS systems worldwide.
Users can select specific satellite constellations or utilize all simultaneously, making it ideal for globally deployed applications such as 5G mobile base stations, as well as for robust infrastructure needs in broadcasting, power, and finance. It supports dual band reception with L5 band less affected by ionospheric delay.

They deliver high-resolution, UTC-synchronized 1PPS timing signals.
It also supports clock output, with three configurable outputs assignable to 1PPS or clock signals.
It directly generates essential frequencies such as 10 MHz, 2.048 MHz, 19.2 MHz, and 30.72 MHz, commonly used in wireless communications.
This flexibility helps shorten time-to-market and enhances your product’s competitiveness.

In addition to improvements in carrier smoothing and optimization of positioning calculations between satellites, the receiver incorporates an industry-leading time estimation algorithm for GNSS time synchronization, achieving world-class time stability.

Compliant with TDEV (Time Deviation) /MTIE (Max Time Interval Error).
Exceeds the most stringent requirements in 5G networks.

The above results show the timing performance when operating GT-100 using only L1 band.

By receiving dual-band, GT-100 is equipped with a function that allows operation using only the L5 band when L1 is jammed, and only the L1 band when L5 is jammed, providing high robustness against jamming.
Even when receiving only L1 or only L5 signals, it achieves a time stability of less than 4.5 ns (1σ).

GNSS timing receivers are increasingly being used in urban environments.
With the technology, "Dynamic Satellite Selection™*", which intelligently selects high-quality satellite signals, timing performance degradation is minimized even in urban areas where multipath signals are present.
This ensures reliable operation even when installed at base stations in cities.

The above results show the timing performance when operating GT-100 using only L1 band.

For GNSS receivers, a position error of 1 meter can cause about 3ns of timing error.
When the position error exceeds 20 meters, the timing error becomes significant and can no longer be ignored.

GT-100 mitigate the effects of jamming signals automatically and to provide real-time notification to the user of the jamming signal frequency and signal strength.
It enhance sreceiver security and identify the source of jamming during the operational phase of a customer's system.
It also implements a detailed algorithm to verify the correctness of GNSS signals and can detect and eliminate spurious signals that are not broadcast from the satellites. It is equipped with a function that allows operation using only L5 band when L1 is jammed, and only L1 band when L5 is jammed, providing enhanced robustness against jamming.

Activities to enhance robustness

Authentication messages from Galileo (European GNSS) and QZSS (Japan's Quasi-Zenith Satellite System) confirm the authenticity of navigation messages, strengthening resistance to spoofing attacks.

Interruption of GNSS satellite signals is a major concern during operation of critical infrastructure systems.
GT-100 supports short term holdover, which maintains constant performance even if GNSS satellite signals are interrupted for a short period of time.

Interruption of GNSS satellite signals is a major concern during operation of critical infrastructure systems.
GT-100 supports short term holdover, which maintains constant performance even if GNSS satellite signals are interrupted for a short period of time.

Compared to conventional GNSS receivers for time synchronization, Furuno's new GNSS receivers are substantially more robust (i.e., they are not affected by most disruptions and thus ensure continuous service).
Such enhanced features give users a high level of confidence in fields that require high reliability, such as 5G mobile base stations, financial transactions, and power grids.

Including secure boot and secure firmware update ensures maximum protection against tampering.

In this white paper, a FURUNO engineer specializing in GNSS timing explains how OSNMA and QZNMA should be used in real-world applications, with practical insights provided in about 20 pages.

"What GNSS spoofing is and why it matters today"
"Key concepts of OSNMA and QZNMA"
"Operational considerations"
"How to use authentication functions in FURUNO GNSS receivers"

Our engineer specializing in time synchronization explains, with charts and diagrams, the countermeasures to be taken on the receiver side against typical GNSS-related problems such as “multipath, "jamming", "spoofing", and interruption of GNSS signal reception, the degree of effectiveness, and how to select a GNSS product.

If this is your first time considering a GNSS receiver, please have a look through these papers.

You can download all five together with the white paper “High Stability of 4.5ns (1 sigma) using a single band GNSS timing receiver”.

Evaluation kit for GT-100.
The Evaluation Kit can supply power and communicate with USB interface.

5VDC Power supply through USB bus power
Serial communication through USB
1PPS/Clock output from the SMA connectors
SMA antenna connection
Outer size is (w) 86mm x (D) 51mm x (H) 21mm
Weight is about 65g
Accessories are USB cable and Multi-GNSS Antenna