MULTI-antenna GNSS(MAGNSS) allows one GNSS receiver to be linked width multiple GNSS antennas so that all the antennas can be used to receive GNSS data and be positioned. The technology is especially useful for monitoring stability of slopes and structures such as dams and bridges.

The technology was first developed in 2000 by the research group at the Hong Kong Polytechnic University in collaborations with scientists from China and Australia. Several new versions of MAGNSS have since then been developed. the product has been used successfully in a large number of projects.

  • User-friendly Windows and Web based software packages for system control and data acquisition, processing, visualization and management.
  • Capability of sending alert messages based on user specified threshold values.
  • The latest GNSS data processing and analysis models and algorithms.
  • User specified result updating rate to suit different application requirements.
  • Fully automatic system operation
  • The technology was awarded a Silver Medal at the in Brussels Innova Fair in 2009.
  • GNSS receivers :2 or more GNSS receivers, 1 or more for reference stations and 1 for each monitoring site.
  • GNSS Antennas: 2 or more GNSS receivers, 1 or more for reference stations and 1 for each monitoring point.
  • Control Unit: An electronic unit that allows connection of up to 16 GPS antennas.
  • Amplifier (Optional):1 or more amplifiers for extend the distance between antenna and control unit.
  • GPRS Modems(optional) : 2 or more modems(e.g., GPRS or 3G) for each MAGNSS if wired data network is unavailable.
  • Operational Software : Software packages for receiving, processing and visualizing GNSS data.

  • Slope Monitoring
  • Bridge Monitoring
  • Civil Structure Monitoring

  • Photo of Installation of Instruments

  • Data Acquisition Device

  • Data Analysis
  • The MAGNSS offers excellent measurement accuracy. The accuracy varies with the result updating interval.
    For example, when the data updating interval is 60minutes, the typical measurement accuracy is 5mm+1ppm in the vertical direction and 2.5mm+0.5ppm in the horizontal direction.
  • Donghae Slope Stability Instrumentation
  • Goseong Slope Stability Instrumentation
  • Yehcheon Dam Structure Monitoring
  • Novatel GPS Antennas (Single/Dual Frequency)
    Model Novatel GPS-702(701)
    Size 178 mm x67mm
    Operating temperature -45℃~+65℃
    Frequency 1227MHZ±10MHZ
    Weight 350 g
    Voltage 4.5~18VDC
  • Anchor Signal Amplifier
    Model GPS-LNA
    Size 55mm x 20mm
    Operating temperature -40° to +85°C
    Frequency 1575.42 MHz
    Bandwidth 20 MHz
    Power supply 3 to 9 VDC @ 7.5 ±1 mA
  • Anchor Multi-Antenna GPS Monitoring Sensor
    Midel GMS16
    Size 482 mm x 395 mm x 140mm
    Operating temperature -30℃ to 70℃
    Characteristics GNSS connectors of up to16 channels
    Weight 3 Kg
    Power supply DC 12 V ± 2V
  • Ashtech MB100 GPS Receiver L1/L2
    Model Ashtech MB100 GPS Receiver
    Operating Temperature -40℃~+85℃
    Channel -30℃ to 70℃
    Characteristic GNSS connectors of up to16 channels
    Characteristic Up to 20 Hz Real-time GPS
    Power +3.3V DC±10% power input
  • The Single-Antenna Multi-Point System (SAMPS) provides the advanced GNSS data processing method and monitoring solution with economical hardware. It is applicable in slope stability analysis, dam and bridge monitoring.
  • GNSS Receiver and Antenna : Install at least 2 GNSS receivers and antenna sets, at least 1 reference
    station set to monitoring points.
  • GPRS Modems(Optional) : 1 GPRS Modem for each GNSS receiver and antenna
  • Software : Visualization of Receiver, Process and GNSS data
  • Solar Power Supply(Optional) : Install at least 1 solar power supply to each monitoring site if the output is not found.
  • Automatic Remote Control System
  • Size-free Flexible Monitoring
  • Wire or Wireless Data Link
  • User-friendly Windows and Web-based Software package for System Control and Data
  • Warning Message Function
  • Advanced GPS Data Processing and Model Analysis and Algorithm
  • Selection of Proper Data Updating Speed for Monitoring Requirement
  • Advanced data processing and analysis method by SAMPS provides reliable measurements
  • Accuracy depends on the updated time gap. See the following Table
SAMPS Common Measurement Accuracy
Data Updating Interval Measurement Accuracy(Standard Deviation) (mm)
Real-time 10
1hour 7
3hour 5
4hour 3
6hour 2
12hour 1.5
24hour 1