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Navisys GR-8018U 50Hz USB GNSS Receiver (u-blox M9V, Indoor UDR “Untethered Dead Reckoning”, Accelerometer & Gyroscope, IPX7 Waterproof, 1.5m Accuracy)

Navisys GR-8018U 50Hz USB GNSS Receiver (u-blox M9V, Indoor UDR “Untethered Dead Reckoning”, Accelerometer & Gyroscope, IPX7 Waterproof, 1.5m Accuracy)

$129.00 USD
$129.00 USD
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Country of Origin: Taiwan

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The NaviSys GR-8018U is an industrial-grade, high-performance GNSS receiver built on the advanced u-blox NEO-M9V chip. Designed for robust positioning accuracy, it integrates cutting-edge technologies for challenging environments and high-speed tracking applications.

With fused GNSS + dead reckoning at up to 50 Hz, built-in accelerometer and gyroscope sensors for Untethered Dead Reckoning (UDR), and concurrent multi-constellation tracking, the GR-8018U keeps positioning continuous in tunnels, parking garages, and urban canyons—while delivering smooth high-speed tracks when satellite visibility is strong.

The GR-8018U is IPX7 waterproof, fully EMI-shielded, magnet-mount ready, and operates from −40°C to 85°C. It connects over USB with a 1.5 m cable, draws about 52 mA during USB tracking, and works with Windows, Linux, and Android.

USB interface · u-blox NEO-M9V · Up to 50 Hz GNSS+DR · Untethered Dead Reckoning · 1.5 m accuracy · 52 mA · IPX7 · 40 × 45 × 18 mm · 1.5 m cable

Key Features

USB Interface

  • USB connection for PCs and embedded hosts
  • Default cable length: 1.5 m (GR-8018U)
  • Supply: 3.3–5.5 VDC
  • Typical current: 52 mA average during USB tracking

→ Plug-and-play USB for Windows, Linux, and Android systems

Up to 50 Hz Update Rate

  • Up to 50 Hz fused GNSS+DR update rates
  • 50 Hz for RMC / GGA (priority messages)
  • Ideal for high-speed objects such as racing vehicles

→ Dense track points instead of sparse dotted lines

Untethered Dead Reckoning (UDR)

  • Built-in accelerometer and gyroscope
  • Maintains positioning in tunnels, basements, and parking garages
  • Navigation can start on power-up before a GNSS fix
  • Position error without GNSS: about 10% of distance traveled

→ Continuous tracks when satellites disappear

High Sensitivity & Reliability

  • Acquisition: −147 dBm
  • Tracking & navigation: −159 dBm
  • AssistNow Online for faster positioning
  • RF interference / jamming detection · spoofing detection and reporting

→ Extra resilience in noisy or contested RF environments

Multi-Constellation · 1.5 m Accuracy

  • 92-channel u-blox M9 engine (NEO-M9V)
  • Concurrent GPS, Galileo, QZSS, SBAS, GLONASS, BeiDou
  • Horizontal 1.5 m · Vertical 3 m (CEP 50%)
  • SBAS: WAAS, EGNOS, MSAS, GAGAN · QZSS L1S SLAS

→ Meter-class accuracy with broad satellite visibility

Industrial Form Factor

  • 40 × 45 × 18 mm
  • IPX7 waterproof · fully EMI shielded
  • Built-in magnet · amber LED fix indicator
  • Operating temperature: −40°C to 85°C (without battery)

→ Built for outdoor and industrial deployment

50 Hz High Update Rate Demo

Unlike the dotted lines typically seen with low-rate GNSS, the data points in this demo form a smoothly presented curve, showcasing improved tracking at up to 50 Hz.

GR-8018U 50 Hz high update rate track demo

Indoor UDR Demo

This demonstration drives into an indoor parking tower: ascend to the second floor along the outer rectangular path, then descend using the inner rectangular path. The total indoor route covers approximately 400 meters. The logged path closely follows the actual route, with minor deviations from travel-related dead-reckoning error.

GR-8018U indoor parking UDR track demo

Applications

  • High-speed tracking (e.g., racing vehicles)
  • Urban environments, tunnels, and areas with poor satellite visibility
  • Industrial and outdoor applications needing robust, precise positioning

Receiver Specifications

GNSS Receiver Type

  • 92-channel u-blox M9 engine (NEO-M9V)
  • GPS L1 C/A · SBAS L1 C/A
  • QZSS L1 C/A/S · Galileo E1 B/C
  • GLONASS L1OF (1598.0625–1605.375 MHz)
  • BeiDou B1I (1561.098 MHz)
  • SBAS: WAAS, EGNOS, MSAS, GAGAN

Accuracy

Horizontal position 1.5 m (CEP, 50%)
Open sky with SBAS and QZSS enabled, −130 dBm, >6 satellites
Vertical position 3 m (CEP, 50%)
Velocity 0.08 m/s (68% @ 30 m/s)
Dynamic attitude Heading 0.3° · Pitch 0.4° · Roll 0.6° (68% @ 30 m/s)
Position error without GNSS ~10% of distance traveled with UDR
Time pulse RMS 30 ns · 99% 60 ns · 0.25 Hz ~ 10 MHz

Navigation Performance

Update rate 50 Hz for RMC, GGA
1 Hz for VTG, GLL, GSA, GSV
Priority NMEA Up to 50 Hz: RMC, VTG, GNS, GGA
Non-priority NMEA Up to 20 Hz: GSA, GSV, GST, ZDA
Max. altitude 80,000 m
Max. velocity < 500 m/s or 1,800 km/h
Max. dynamics ≤ 4 g

TTFF & Sensitivity

Hot start 2 s
Cold start 24 s (−130 dBm, 50%)
Acquisition −147 dBm
Tracking & navigation −159 dBm

Measurement Data Output

  • Protocols: NMEA, u-blox Binary
  • NMEA: 4.11 (default), 4.10, 4.0, 2.3, 2.1
  • UART: N,8,1 · baud 4800–921600 bps (default 115200)

Power

Power consumption 52 mA (average during USB tracking)
Power supply 3.3 ~ 5.5 VDC

Mechanical & Environment

Dimension 40 × 45 × 18 mm
Cable length 1.5 m (GR-8018U)
Fixing Strong magnet at the bottom
LED indicator Amber
Operating temperature Without battery: −40°C to 85°C
With battery: −20°C to 60°C
Storage temperature Without battery: −40°C to 85°C
With battery: −20°C to 60°C
Operating humidity 5% ~ 95% non-condensing
Waterproof IPX7

How to Perform UDR Calibration

To ensure optimal Untethered Dead Reckoning performance, calibrate the system as follows:

  1. Initial setup
    • Drive to an open area (e.g., a parking lot) with strong GNSS reception.
    • Remain stationary for at least 3 minutes to achieve a reliable GNSS fix.
  2. Figure-of-eight pattern
    • Drive a figure-of-eight three times, or make about 10 left and right turns (each ≥ 90°) at a minimum of 30 km/h.
  3. Straight-line driving
    • Drive straight for at least 100 m at a minimum of 40 km/h.
  4. Monitor calibration status
    • With NaviViewerM9V, you can watch calibration status transitions similar to the example below.
    NaviViewerM9V UDR calibration status overview
  5. Calibration status examples
    • Status transitions look similar to these examples:
    UDR calibration status example 1 UDR calibration status example 2 UDR calibration status example 3

What's in the Box

  • Navisys GR-8018U GNSS Receiver × 1

Product Resources

Official Documents

Downloads

For Windows 10, Windows 11, Android, and Linux, native drivers are already included with the operating system. There’s no need to download or install additional drivers. Simply plug in the GNSS receiver, and it will be recognized and start working immediately.

USB Drivers

Tools

How-to Articles and Blogs

Tech Support Topics and Forums

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