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