GNSS Reference Station Network Applications – Status and Vision
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Transcript of GNSS Reference Station Network Applications – Status and Vision
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GNSS Reference Station Network Applications
– Status and Vision
Herbert LandauTrimble Munich, Germany
January 2011
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• GNSS network as reference frame• Positioning with cm-accuracy• Monitoring • Ionospheric research • Meteorology
Multiple use of GNSS Networks
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Trimble Multi-Server Software Platform
Software Platform
VRS
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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
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Reference Station data streaming to the Control Center
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User receiver sends its position to the Control Center via cell phone
Position
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Control Center transmits optimized correction stream for each user via cell phone (creating a virtual local
reference station VRS)
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Network RTK Applications
• Survey• Machine control• Agriculture• Mapping&GIS
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Monitoring in VRS³NetPlate Tectonics
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Earthquake in Chile February 27, 2010
Monitoring in VRS³NetEarthquakes
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Earthquake in Chile February 27, 2010
Monitoring in VRS³NetEarthquakes
Santiago movement Feb. 27, 2010, Day 58
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Monitoring Example: Subsidence of Oil Platforms
Rate up to decimeters per year
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Monitoring Example: Bridge collapse
Update rates up to 10 Hz
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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
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GNSS derived Water Vapor European Network (estimates every 15 seconds)
Radar ImageGNSS derived water vapor
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Ionospheric Solar CycleMaximum in 2013/2014
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06:00 am UTC 12:00 am UTC 06:00 pm UTC
Ionosphere and GNSSReal-Time Warning Sytem
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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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