GPS/GNSS Modules

Timing Multi-GNSS Receiver Module Model GT-87

High sensitivity and high accuracy timing Multi-GNSS Receiver Module

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.

>> New Product:GT-88 (Extremely high stability of 4.5ns (1sigma) using a single band receiver)

Timing

Features

  • 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

Specifications

GENERAL

GNSS Reception Capability
GPS L1 C/A, GLONASS L1OF, QZSS L1 C/A, SBAS L1 C/A
(Ready): Galileo E1B/E1C, QZSS L1S
GNSS Reception
26 channels (GPS, GLONASS, QZSS, SBAS)
Update Rate
1Hz
Sensitivity
GPS
Tracking: -161 dBm
Hot Start: -161 dBm
Warm Start: -147 dBm
Cold Start: -147 dBm
Reacquisition: -161 dBm

GLONASS
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)
GPS+SBAS:2.0m(CEP)
GPS+SBAS+GLONASS:2.0m(CEP)

*Measurement platform with recommended active antenna
1PPS Stability
15ns(1σ)
Clock Configurable Range
4 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 Voltage
3.3VDC
Power Consumption
Acquisition Mode: 62.5 mA
Backup Supply
1.4 to 3.6VDC / 9 μA (Typ)
Operating Temperature
-40°C to +85°C
Storage 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)
M12 Binary
Interfaces
UART, Time Pulse (1PPS), Clock
Anti-Jamming
Available
Multipath Mitigation
Available

Drawing

Evaluation Kit


GT-87
 Evaluation Kit is available to evaluate the performance of GT-87.
The Evaluation Kit can supply power and communicate with USB interface.
 
FEATURES
  • 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

* Specifications subject to change without notice.