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GNSS Reference Station Network Applications – Status and Vision

This document provides an overview of the multiple uses of GNSS networks, including positioning with cm-accuracy, monitoring, ionospheric research, and meteorology. It also highlights the benefits of Trimble's VRS networks and real-time correction services in achieving better accuracy, reliability, and productivity.

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GNSS Reference Station Network Applications – Status and Vision

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  1. GNSS Reference Station Network Applications – Status and Vision Herbert Landau Trimble Munich, Germany January 2011

  2. Multiple use of GNSS Networks • GNSS network as reference frame • Positioning with cm-accuracy • Monitoring • Ionospheric research • Meteorology

  3. VRS Networks GNSS Integrity Monitoring Monitoring Atmospheric Research Trimble Multi-Server Software Platform Software Platform ?

  4. GNSS Networking Real-Time Correction Services • More than 4000 stations operated by Trimble software • Eliminating/mitigating errors like orbit, ionosphere, troposphere • Real-time corrections to RTK rovers via GPRS/3G modems • cm-accurate RTK positioning in a unified coordinate frame • Better accuracy, reliability, productivity • International standard, e.g. RTCM

  5. Reference Station data streaming to the Control Center

  6. User receiver sends its position to the Control Center via cell phone Position

  7. Control Center transmits optimized correction stream for each user via cell phone (creating a virtual local reference station VRS)

  8. Network RTK Applications • Survey • Machine control • Agriculture • Mapping&GIS

  9. Monitoring in VRS³NetPlate Tectonics

  10. Monitoring in VRS³NetEarthquakes Earthquake in Chile February 27, 2010

  11. Monitoring in VRS³NetEarthquakes Earthquake in Chile February 27, 2010 • Santiago movement • Feb. 27, 2010, Day 58

  12. Monitoring Example: Subsidence of Oil Platforms Rate up to decimeters per year

  13. Monitoring Example: Bridge collapse Update rates up to 10 Hz

  14. GNSS Networks & Meteorology • Water vapor highly variable quantity • Water vapor for short-term forecasts of precipitation • Water vapor (62%) biggest component to contribute to greenhouse effect (carbon dioxide 22%) • Global increase of precipitable water observed • Computation of Integrated Precipitable Water Vapor (IPWV) from • network GNSS data • Ground meteorological data • RMS in IPWV < 1mm

  15. GNSS derived Water Vapor European Network (estimates every 15 seconds) GNSS derived water vapor Radar Image

  16. Ionospheric Solar CycleMaximum in 2013/2014

  17. Ionosphere and GNSSReal-Time Warning Sytem 06:00 am UTC 12:00 am UTC 06:00 pm UTC

  18. Summary • Worldwide GNSS networks (several thousands of stations) • Benefits for many scientific, state official and commercial applications • Solutions for server and rovers • New GNSS signals will increase applicability • GPS L5, GLONASS CDMA, Galileo, QZSS, Compass, IRNSS

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