GPS/GNSS Modules

Timing Multi-GNSS Receiver Module Model GT-87NEW

For Timing

High sensitivity and high accuracy timing Multi-GNSS Receiver Module

The GT-87 is the high-sensitivity, high-accuracy Timing Multi-GNSS receiver.
The GT-87 supports TRAIM and various position modes, allowing it to output accurate and robust 1PPS synchronized to UTC time.
The GT-87 supports GPS, GLONASS, QZSS, SBAS, Active Anti-Jamming and Advanced Multipath Mitigation Functions.

Related Contents


  • Multi-GNSS, Concurrent reception of GPS and GLONASS

    ・Improved of robustness thanks to concurrent reception of GPS and GLONASS signals
    ・Supports concurrent GPS, GLONASS, SBAS and QZSS. Galileo Ready
  • Simultaneous output of time pulse (1PPS) and low jitter clock (configurable, 4 kHz to 40 MHz) synchronized with the 1PPS

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

    ・1PPS stability: 15 nsec (1σ) 
  • Single satellite tracking capable operations (except Navigation Mode)

  • Detect/Disable low integrity satellites (TRAIM function)

    ・Suitable for infrastructure development which needs high integrity.
  • Improved Noise Tolerance

    Reduces effects of internal and external noise
    Active Anti-Jamming
    Advanced Multipath Mitigation
  • Embedded Flash ROM

    Suitable for long-term use backed by FURUNO’s continuous support and function enhancement
  • Enhance performance in combination with recommended antenna

    Multi-GNSS antenna AU-217 receives GPS signal (L1 band) and GLONASS signal (G1 band), and has highly noise resistant as well as highly environmental resistant equivalent to IP67. Multi-GNSS antenna AU-217 is suitable for use with Furuno timing Multi-GNSS modules and disciplined oscillators.
    Here's more on  Multi-GNSS antenna AU-217



GNSS Reception CapabilityGPS L1 C/A, GLONASS L1OF, QZSS L1 C/A, SBAS L1 C/A
(Ready): Galileo E1B/E1C, QZSS L1S
GNSS Reception26 channels (GPS, GLONASS, QZSS, SBAS)
Update Rate1Hz
Tracking: -161 dBm
Hot Start: -161 dBm
Warm Start: -147 dBm
Cold Start: -147 dBm
Reacquisition: -161 dBm

Tracking: -157 dBm
Hot Start: -157 dBm
Warm Start: -143 dBm
Cold Start: -143 dBm
Reacquisition: -157 dBm

*Measurement platform with recommended active antenna
Position Accuracy (Horizontal)GPS:2.5m(CEP)

*Measurement platform with recommended active antenna
1PPS Timing Accuracy15ns(1σ)
Clock Configurable Range4 KHz to 40 MHz
TTFF (Typical)Hot Start: <5 sec (@-130 dBm)
Warm Start: 35 sec (@-130 dBm)
Cold Start: 35 sec (@-130 dBm)

*Measurement platform with recommended active antenna
Supply Voltage3.3VDC
Power ConsumptionAcquisition Mode: 62.5 mA
Backup Supply1.4 to 3.6VDC / 9 μA (Typ)
Operating Temperature-40°C to +85°C
Storage Temperature-40°C to +85°C
Package24Pin LCC (Leadless Chip Carrier)
ProtocoleSIP (NMEA 0183 Standard Ver 4.10)
M12 Binary
InterfacesUART, Time Pulse (1PPS), Clock
Multipath MitigationAvailable


Evaluation Kit

 Evaluation Kit is available to evaluate the performance of GT-87.
The Evaluation Kit can supply power and communicate with USB interface.
  • 5VDC Power supply through USB bus power
  • Serial communication through USB
  • 1PPS output from the SMA connectors
  • SMA antenna connection
  • Outer size is (w) 110mm x (D) 112mm x (H) 30mm
  • Weight is about 260g
  • Accessories are USB cable, GPS-GLONASS Antenna and CD ROM containing the Communication Software, the USB driver and the documentations



Locate a Distributor Contact a local distributor for further details.

* Specifications subject to change without notice.

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