Timing Multi-GNSS Receiver Module Model GT-88

Features

• Enable to output accurate and robust UTC time and 1PPS synchronized with UTC time

  FURUNO technology made it possible to achieve 5G-required performance. 4.5ns (1 sigma) by a single band receiver is obtained. This is achieved by an improved and advanced position estimation algorithm. It optimizes position calculations using several different GNSS satellite constellations. It allows users to achieve 5G-required performance without changing existing single band GNSS antennas.
  
  White Paper: High Stability of 4.5ns (1 sigma) using a single band GNSS timing receiver

• GNSS antennas can be mounted on walls and windows of tall buildings

  The Dynamic Satellite Selection™* minimizes deterioration of time synchronization performance by choosing only the high quality satellite signals
  * a new satellite signal selection algorithm developed by NTT
  
  White Paper: Industry-leading multipath mitigation in urban canyon environments
  
  

• Suitable for various RF・Broadcasting applications. Designed functions aiming to solve usual troubles on site.

  The number of radio stations applied with GNSS time synchronization, ex. PMR, local 5G, and V2X, has been increasing year by year. Especially in urban area, users have to face problems such as urban canyon (signals blocked) and multi-path (signals reflected) etc.

  1. Multipath in Urban area
  2. Jamming (interference wave)
  3. Spoofing

  Countermeasure for GNSS receiver failure. (White Paper)

• Compliant with G.8272 PRTC-A

  *Compliant with TDEV/MTIE

• Concurrent reception of GPS/GLONASS/Galileo/QZSS/SBAS

• Suitable for various communication and broadcasting applications

  TRAIM, Single Satellite Tracking, Multipath Mitigation, Anti-Jamming and Anti-Spoofing

• Configurable frequency output (10 Hz to 40 MHz)

• Enhance performance in combination with recommended antenna

  AU-300 Multi-GNSS Timing Antenna delivers both high stability and high robustness.

Specifications

General

GNSS Reception Capability

GPS L1C/A, GLONASS L1OF, Galileo E1B/E1C, QZSS L1C/A, QZSS L1S, SBAS L1C/A

GNSS Reception

32 channels

Sensitivity

GPS
Tracking: > -162 dBm
Acquisition: > -148 dBm

GLONASS
Tracking: > -158 dBm
Acquisition: > -144 dBm

Galileo
Tracking: > -146 dBm
Acquisition: > -136 dBm

QZSS
Tracking： > -147 dBm
Acquisition： > -131 dBm

*Measurement platform with recommended active antenna

ITU-T Recommendation

Compliant with G.8272 PRTC-A

*Compliant with TDEV/MTIE

1PPS Stability

< 4.5 ns (1σ)

*Open sky

1PPS Accuracy

< ± 40 ns (vs UTC)

*Open sky

1PPS Resolution

± 1.75 ns

Clock Output

10 Hz to 40 MHz

TTFF (Typical)

Hot Start: <5 sec
Cold Start: <35 sec

*Measurement platform with recommended active antenna

Supply Voltage

3.3 VDC

Current Consumption

< 68 mA

*85℃ when tracking

Operating Temperature

-40°C to +85°C

Package

24Pin LCC（Leadless Chip Carrier）
12.2mm × 16.0mm × 2.8mm

Protocol

eSIP (NMEA 0183 Standard Ver 4.10)

Interfaces

UART, Time Pulse (1PPS), Clock

Functions

Anti-Jamming (8CW), Multipath Mitigation (Dynamic Satellite Selection™), Anti-Spoofing, T-RAIM

Countermeasure for GNSS receiver failure

We provide technical white papers for each of the typical failures caused by GNSS receiver. For each failures, our experts in time synchronization explain details about countermeasures on receiver side, using diagrams to show the effectiveness, and how to select products. If you are considering a GNSS receiver for the first time, please take a look.

1. High stability with single band receiver
   White Paper: High Stability of 4.5ns (1 sigma) using a single band GNSS timing receiver
2. Multipath in Urban area
   White Paper: Industry-leading multipath mitigation in urban canyon environments
3. Jamming (interference wave)
   White Paper: Measures against GNSS jamming (jamming wave)
4. Spoofing
   White Paper: Measures against GNSS spoofing signals
5. Interruption of GNSS signal (holdover)
   White Paper: "Holdover function" as measures against GNSS reception interruptions

The GT-88 doesn't have holdover function. If necessary, please use GF-8802/GF-8803/GF-8804/GF-8805 instead.

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Quote Request

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

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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-88

• Hardware Specifications
• Protocol Specifications
• White Paper (Countermeasure for GNSS receiver failure)
• White Paper (Multipath test report in Urban Canyon with Spirent)
• User's Guide (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

Documentation

• GT-88 Brochure
  (Last update: Jan 14, 2025)

Contact

Locate a Distributor Contact a local distributor for further details.

* Specifications subject to change without notice.