Public Sector Networks- Vermont New England Real Time Network Summit Friday August 6, 2010 Dan Martin National Geodetic Survey VT State Advisor.

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Presentation transcript:

Public Sector Networks- Vermont New England Real Time Network Summit Friday August 6, 2010 Dan Martin National Geodetic Survey VT State Advisor

What is VECTOR?? Vermont Enhanced CORS & Transmission Of Real-time data Network of Continuously Operating GNSS Reference Stations. Provides access to the National Spatial Reference System (NSRS) Access available for post processing (Static) and Real-time (single base RTK).

VECTOR Expansion VCAP VTUV 2006 – VTD2, VTSP, VTWR, VTOX, VTD7, VTD9, VTC1, VTSA, VTRU, (VCAP Upgrade) 2008 – VTBE, VTDA, VTMI, VTIP Four Stations will be added in 2010 to complete the network - Dover, Bolton, Hardwick, and Eden

Real Time Networks

So What?? What is the benefit to having these station out there? – Are they being used? – How are they being used? – Who is using them? – How are they being accessed? – How much are they being accessed?

How are they being used? Highway Surveys Collection of inventory and resource data – Culvert inventory, Rest Area re-design, and ITS elements such as RWIS, PCMS/VMS, and WIMS location and planning Control surveys for photography and LiDAR Topo Boundary Flood Plane mapping Wetland Surveys Construction stakeout Geodetic and Geophysical applications – Ionospheric modeling – Plate tectonics – Precipitable Water Vapor modeling (weather forecasting)

LiDAR QA

Interstate Small Culvert Inventory I89 – ≈4000 Culverts – ≈2800 DI’s – ≈10,800 Total Shots I91 (first 95 miles) – ≈2700 Culverts – ???? DI’s – ≈5400 Total Shots+DI’s 59 crew weeks – ≈ $60k savings

I89 Small Culvert Inventory

Who is using them VTrans Land Surveyors Engineering firms GIS Professionals Foresters Other State Agencies Such as Agency of Natural Resources and Department of Agriculture Other non-VT State Agencies Federal and International Agencies and educational institutions – National Weather Service – National Geodetic Survey – US Geological Survey – Geodetic Survey Canada – International GNSS Service – UVM, UNH, UMaine, Lyndon and Johnson State, Norwich University

How are the VT CORS being Accessed? Raw Data (post processing) – VTGS Web – VTGS FTP – NGS Web (UFCORS) Derived Products – OPUS_S – OPUS_RS – OPUS_DB – RTK Corrections Incorporated into other networks (NY, Keynet, MTS)

2009 Statistics Product2009 Usage UFCORS Downloads hr files (ave) VT Web Download (VTDL) hr files VT FTP Download hr files OPUS_S816 Solutions OPUS_RS564 Solutions OPUS_DB97 Submissions RTK1614 Hours

COST/Benefit of VT CORS (Initial Investment) Initial system investment into the VT CORS Network which was made to support the fiber optic project on the VT Interstates ≈ $340,000 – 9 receivers and antennas – system software, – Installation – required field equipment needed to make use of the system (4 rovers)

Benefit Easy to quantify (included in report) – Reduction in person hours to accomplish a task – Reduction in purchased equipment to accomplish a task – Reduction in purchased software Difficult to quantify (not included in report) – Reduced training (multiple types of equipment) – Reduced maintenance (multiple types of equipment) – Consistency and reliability of a system

Some generalities need to be made One CORS replaces one receiver and operator Without CORS network, one receiver and observer would need to spend an average of 2 hours to collect and download one hour of data (including travel) Average UFCORS download consists of 2 hours of data Cost of one observer and receiver is $50/hour Most VT FTP users are “Resource Grade” users who require less accuracy. Could operate without VT CORS but would be subjected to even lower accuracy. FTP data has half the $$ benefit of data retrieved from the web page

Benefit for VT CORS Products ProductUser Benefit UFCORS$200/download VT Web Download (VTDL)$100/1-hour file VT FTP Download$50/1-hour file OPUS_S$600/solution OPUS_RS$600/solution OPUS_DB$400/submission RTK$100/hour

Direct Benefit to VTrans (work on Interstate) RTK – 2007 use = 576 hours – 2008 use = 970 hours – 2009 use = 812 hours OPUS_S – 2008 solutions = 60 – 2009 solutions = 97 OPUS-DB – 2008 submissions = 60 – 2009 submissions = 97

Direct Benefit to VTRANS

Direct Benefit to VTrans 3 year benefit ( ) ≈ 112% of initial system investment

Cost/Benefit (Current level of investment) Current level of investment ≈ $567,668 which includes the initial investment ($340,000) plus – 8new CORS ($195,528) – Extended Warranty on firmware and software since implementation ($32,140) Benefit/Cost ratio of 11.3 to 1 in 2.5 years

Summary The VT CORS Network has provided significant benefit to VTrans and the taxpayers of VT It supports a wide variety of different applications from a diverse user community Three-year cost recovery based on VTrans usage only

Recommendations Continue with expansion of network to provide state-wide coverage Work to get as many stations into the National Network as possible Work to increase the use of the network inside VTrans Continue to promote the network outside of VTrans