www.corsnet.com.au State infrastructure for GNSS applications… CORS of course! Volker Janssen Survey Infrastructure and Geodesy, LPI
NSW
www.corsnet.com.au
State infrastructure for GNSS applications… CORS of course! Volker Janssen
Survey Infrastructure and Geodesy, LPI
2 GNSS Futures Workshop, UNSW, Sydney, Australia, 7-8 July 2014
Outline • Evolving survey infrastructure.
• CORSnet-NSW.
• SCIMS vs. CORS.
• Next-generation datum.
• Why use CORS?
• Internal GNSS applications.
• External GNSS applications.
• Supporting the profession.
• Conclusions.
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From TRIGS To CORS
Continuously Operating Reference Stations
Evolving Survey Infrastructure Passive Survey Control Active Survey Control
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CORS in NSW
SydNET
• 1992: LPI’s first CORS
installed in Bathurst.
• 2004: 7 CORS operating
in greater Sydney area
SydNET.
• 2009: Expansion to provide
state-wide coverage
CORSnet-NSW.
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CORSnet-NSW (Nov 2009)
27 stns in operation
+ 3 national CORS
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CORSnet-NSW (June 2014)
150 stns in operation
160 stns by late 2014
RTK: 67% area, 99.8% population
NRTK: 54% area, 98.4% population
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CAAM • CORSnet-NSW Adjustable Antenna Mount (CAAM):
Legally traceable
survey monument.
Antenna oriented to TN.
Zero antenna height.
Australian
Patent
issued.
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CORSnet-NSW: Monitoring
• Stability monitoring of all CORSnet-NSW sites:
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SCIMS vs. CORS
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SCIMS vs. CORS SCIMS… GDA94(1997)
• Original realisation of GDA94, adjusted in 1997.
• Based on local connections to surrounding control
Indirect connection to AFN.
Distortions, i.e. unsuitable for CORS network.
• CORSnet-NSW coords via local tie survey (SCIMS).
CORS… GDA94(2010)
• Ad-hoc realisation of GDA94, introduced in 2010.
• Based exclusively on GNSS observations
Direct connection to AFN, virtually distortion-free.
• CORSnet-NSW coords via Reg 13 (website).
Site Transformation!
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Local Tie Surveys Initial Goal:
• Current datum improvement.
– GDA94(1997) coords of CORS.
– AHD71 value of CORS.
– Upgrade UU components to D4
for existing control.
Ultimate Goal:
• Next-generation datum improvement.
– Readjustment of GDA94(1997)
based on CORS GDA2020.
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Preparation for the New Datum
Tie surveys to link
CORS & ground marks.
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Why a New Datum?
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Why use CORS? • Infrastructure maintained externally.
• Direct connection to datum.
• Legal traceability.
• Accuracy.
• Reliability.
• Ease of operation.
• Speed.
• Productivity.
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Why use CORS? • Improved productivity in surveying & land management:
20-40% in 2012 further 20% by 2020.
• $ billions of income & savings:
Allan Consulting (2008) Economic benefits of high resolution positioning service.
Allan Consulting (2013) Precise positioning services in the surveying and land management sector.
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Internal GNSS
Applications
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State Survey Control
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DCDB Upgrade
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Ground Control for LiDAR & Imagery
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External GNSS Applications
External GNSS
Applications
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• Land surveying, construction & mining.
• Machine control & precision agriculture.
• Remote sensing & photogrammetry.
• Asset inventory & management.
• Fleet management.
• Emergency response.
External GNSS Applications
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• Deformation monitoring.
• Atmospheric monitoring.
• Sea level & climate change.
• Animal tracking.
• Navigation.
• Research.
External GNSS Applications
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Volcano Deformation Monitoring
Mount Papandayan
in Indonesia…
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Rift Mechanics & Glacial Motion
Amery Ice Shelf in
Antarctica…
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GNSS-Based Animal Tracking
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Intelligent Transport Systems (ITS)
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Supporting the
Profession
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AUSPOS
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National Positioning Infrastructure (NPI)
• Provide reliable, compatible & interoperable positioning
infrastructure to deliver access to fit-for-purpose PNT info
in a multi-GNSS enabled information economy.
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Next-Generation Datum Meckering, WA
Oct 1968 GDA94
GNSS Vectors < 3,000
Current
More GNSS
Higher Precision 90,000 +
Coord Accuracy
250 mm (95% CI)
Coord Accuracy
20 mm (95% CI)
Tie surveys… 6h+ AUSPOS…
More data…
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GNSS Validation Networks
Bass Hill
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Regulations, Directions, Guidelines
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• Positioning infrastructure & CORS.
• GNSS & CORS applications.
• RTK, NRTK, PPP, Virtual RINEX.
• Datums & transformations.
• Heighting & AUSGeoid09.
• EDM baseline infrastructure.
• Airborne LiDAR.
• Best practice.
• GeodesyML.
• SCIMS3.
Research & Publications
34 GNSS Futures Workshop, UNSW, Sydney, Australia, 7-8 July 2014
• CORS infrastructure crucial for modern positioning.
• State jurisdictions provide essential link betw. federal
initiatives & academia and the profession.
– Infrastructure maintenance.
– Applied research.
– Legislation.
– Guidance.
Conclusions
35 GNSS Futures Workshop, UNSW, Sydney, Australia, 7-8 July 2014
Questions...?
CORSnet-NSW
rocks !!!
http://www.corsnet.com.au