Timing Multi-GNSS Receiver Module Model GT-100 NEW

Features

• Support major global GNSS constellations (L1, L5)

  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.

• Deliver clock outputs and 1PPS synchronized with UTC

  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.

• The world's highest level of stability of less than 4.5ns (1σ) under open sky

  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 G.8272 PRTC-A and PRTC-B

  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.

• High robustness with dual-band reception on L1 and L5

  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).

  (White Paper)Dual Band GNSS Receivers: Safeguarding Critical Infrastructure

• World's lowest accuracy degradation in harsh urban multipath environments

  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.
  
  * Multipath resistance technology based on an algorithm developed by NTT
   

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

  Positioning Error Between GT-100 and Company A's GNSS Receiver and the Antenna Installation Point
  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.
  

• Anti-Jamming, Anti-Spoofing

  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.

  Signal strength transition when strong jamming is applied to the L1 band.
  

  Activities to enhance robustness
  FURUNO ELECTRIC Joins Experts From Around the World on a Norwegian Island for Jammertest 2024

• Authentication feature (OSNMA/QZNMA)

  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.

  (White Paper)The Latest in GNSS Spoofing Countermeasures: How to Use OSNMA and QZNMA

  Video: What is OSNMA/QZNMA?

• Short term holdover

  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.

• External clock input

  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.

• Carrier Grade Quality, Suitable for critical infrastructure applications

  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.
  
  White Paper: Countermeasure for GNSS receiver failure

• Sophisticated built-in security

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

• Enhance performance in combination with recommended antenna

  AU-500 Multi-GNSS Timing Antenna delivers both high stability and high robustness.

• Three product models available in the same form factor

  Model	Frequency band	Output		Short term holdover	External clock input
  		1PPS	Clock
  GT-100	L1 / L5	○	○	○	○
  GT-9001	L1	○	○	○	○
  GT-90	L1	○	－	－	－

Specifications

General

GNSS Reception Capability

GPS L1C/A, GLONASS L1OF, Galileo E1B/E1C,BeiDou B1I /B1C, QZSS L1C/A, SBAS L1C/A
GPS L5, Galileo E5a, BeiDou B2a, QZSS L5, NavIC L5

GNSS Reception

62 channels

Sensitivity

Acquisition： >= -148 dBm
Tracking： >= -163 dBm

*Measurement environment using GNSS simulator

ITU-T Recommendation

Compliant with G.8272 PRTC-A and PRTC-B

*Compliant with TDEV (Time Deviation) /MTIE (Max Time Interval Error)

1PPS Stability

< 4.5 ns (1σ)

*Open sky

1PPS Accuracy

< ± 40 ns (vs UTC)

*Open sky

1PPS Resolution

< ± 0.2 ns

Clock Output

1 MHz to 40 MHz
Stability : < 0.5 ppb (1σ)
Short Term Stability (Root Allan variance ( =1s)) : < 5 × 10^-10
Long Term Stability (24h average) : < ± 1 × 10^-12

TTFF (Typical)

Hot Start: 2 sec(Typ)
Cold Start: 35 sec(Typ)

*Measurement platform with recommended active antenna

Supply Voltage

3.3 VDC

Current Consumption

55 mA
*Tracking Satellite outdoor

Operating Temperature

-40°C to +85°C

Package

47Pin LCC（Leadless Chip Carrier）
18.0mm × 17.8mm × 3.11mm

Protocol

PFEC (NMEA 0183 Standard Ver 4.11)

Security

Secure boot, Secure FW update

Interfaces

UART, GPIO, Time pulse (1PPS), Clock, External clock input

Functions

Anti-Jamming (8CW), Multipath Mitigation (Dynamic Satellite Selection™), Anti-Spoofing, Holdover, T-RAIM, Antenna Detection Circuit, TAI output, Multiple data formats (RTCM10403.3, RINEX4.1, binary)

White Papers

- Dual Band GNSS Receivers: Safeguarding Critical Infrastructure

What are the advantages of a dual-band frequency receiver in time synchronization applications where service outages are not tolerated?

Our engineer specializing in time synchronization explains the following in over 20 pages.
"Why is now the right time to move to dual-band?"
"Robustness by dual-band receiver"
"Outstanding features of GT-100"

Download form

 

- The Latest in GNSS Spoofing Countermeasures: How to Use OSNMA and QZNMA

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"

Download form

 

- Countermeasure for GNSS receiver failure

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”.

Download form

Documents, Software

Download documents and software related to this product and other GPS/GNSS products (Specifications document, Drivers and Monitor software).
 

Download contents for GT-100

• Hardware Specifications
• Protocol Specifications
• Function Specifications
• User's Design Guide
• White Paper (Dual Band GNSS Receivers: Safeguarding Critical Infrastructure)
• White Paper (Countermeasure for GNSS receiver failure)
• Operating Manual (Evaluation Kit)
• Monitoring Software
• Article (Supporting Industrial and Societal DX Through Time Synchronization)
• Article (Strengthening Critical Global Infrastructure: Ushering in an Era of Dual Band GNSS Signal Reception for Time Synchronization)
• Article (Basics of Network Time Synchronization)
• Article (Supporting nanosecond-precise infrastructure with GNSS technology cultivated from marine business)

Download page

Terms

Evaluation Kit

Quote Request

Please fill out the quote form and our staffs will respond to you shortly.
 

This is a quote form only for GNSS receivers for time synchronization.
For other contents, please contact us using the respective inquiry form.

Quote request form

Documentation

• GT-100 Brochure
  (Last update: Apr 5, 2024)
• Time Synchronization Product Catalog
  (Last update: Apr 30, 2024)

Contact

Locate a Distributor Contact a local distributor for further details.

* Specifications subject to change without notice.