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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

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• 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