1. National Height Modernization Eastern Regional Meeting March 4, 2014 Continuously Operating Reference Stations (CORS) Neil D. Weston National Geodetic Survey, NOS, NOAA

2. National Height Modernization Eastern Regional Meeting March 4, 2014 Outline Introduction Continuously Operating Reference Stations Network Applications Products Selection Criteria Business Model

3. National Height Modernization Eastern Regional Meeting March 4, 2014 Introduction - CORS CORS – Nationwide network of GPS/GNSS receivers – 1900+ stations Multi-purpose, cooperative endeavor – Federal – NOAA, Federal Aviation Administration – State – Departments of Transportation – Academic – Universities – Others – Private – 226 partners $1.2 Billion in economic benefits for USA -2012

4. National Height Modernization Eastern Regional Meeting March 4, 2014 CORS Network

5. National Height Modernization Eastern Regional Meeting March 4, 2014 Stations on Four Continents

6. National Height Modernization Eastern Regional Meeting March 4, 2014 CORS Applications Geodesy / Surveying / Hydrography Meteorology / Space Weather Geophysical applications / Monitoring Geographic Information Systems (GIS/LIS) Mining / Forestry Interference Detection

7. National Height Modernization Eastern Regional Meeting March 4, 2014 CORS Products and Activities GNSS (GPS + GLONASS) – Data Reference Frames and Coordinates Station Metadata Online Positioning User Service (OPUS) Antenna Calibration Geoid Modeling Remote Sensing / Photogrammetry Surveying Orbit Production

8. National Height Modernization Eastern Regional Meeting March 4, 2014 Antenna Calibrations Absolute Antenna Calibrations – For use with IGS08, epoch 2005.00 – For use with NAD 83 (2011, MA11, PA11) epoch 2010.00 Relative Antenna Calibrations – For use with ITRF00, epoch 1997.00 – For use with NAD 83 (CORS96, PACP00, MARP00) epoch 2002.00

9. National Height Modernization Eastern Regional Meeting March 4, 2014 GPS Orbits Ultra-rapid (iguWWWWD.sp3) – 6 hour latency, 24 hour file, sp3 format Rapid (igrWWWWD.sp3) – 13 hour latency, 24 hour file, sp3 format Final (igsWWWWD.sp3) – 12 to 14 day latency, 24 hour file, sp3 format

10. National Height Modernization Eastern Regional Meeting March 4, 2014 CORS Selection Criteria 70 Km Spacing – Meet and support NOAA mission – Higher density sites – excessive redundancy – NOAA and other federal agency needs – Data quality of nearby CORS – Equipment – receivers and antennas – Collection rate – GNSS / GPS – observations available

11. National Height Modernization Eastern Regional Meeting March 4, 2014 Business Model Executive and Agency Summary Continuously Operating Reference Stations (CORS) CORS Products and Services Market Analysis Operational Components Management and Organization Costs and Associated CORS Activities Geodetic Resources External Dependencies

12. National Height Modernization Eastern Regional Meeting March 4, 2014 CORS Statistics Data Type20122013 CORS FTP44,774,66641,276,983 UFCORS1,212,6041,263,519 OPUS286,599232,591 OPUS-RS136,450129,218

13. National Height Modernization Eastern Regional Meeting March 4, 2014 OPUS-RS Accuracy

14. National Height Modernization Eastern Regional Meeting March 4, 2014 OPUS-RS Accuracy

15. National Height Modernization Eastern Regional Meeting March 4, 2014 OPUS-RS Accuracy

16. National Height Modernization Eastern Regional Meeting March 4, 2014 OPUS-RS Accuracy

17. National Height Modernization Eastern Regional Meeting March 4, 2014 Thank You Dr. Neil D. Weston neil.d.weston@noaa.gov +1 301-713-3169