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Evaluation of Dynamic Heights on the Great Lakes

Explore evaluation methods for dynamic heights on the Great Lakes using geopotential models and GNSS. Includes summary and ongoing challenges in water topography.

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Evaluation of Dynamic Heights on the Great Lakes

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  1. Evaluation of Dynamic Heights on the Great Lakes Daniel Roman and Xiaopeng Li

  2. HC vs. NAVD 88 Datum Defect Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

  3. GL WLS Stations Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

  4. Method Geometric coordinates of water surface Inverted rod CORS Antenna WLS Housing ETG Receiver ETG Table (datum) Great Lake leveling BM IGLD 85 Datum surface Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

  5. Method Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

  6. Geometric Coordinates of WS (CORS) Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

  7. Geopotential Model-Derived Heights (CORS) Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

  8. Geometric Coordinates of WS (Campaign GPS-Canadian solution) * Latitude/longitude are from hand held GPS at WLS station – height transferred from BM Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

  9. Geopotential Model-Derived Heights (Campaign GPS-Canadian solution) Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

  10. Summary • Dynamic Heights can be derived from a geopotential model and GNSS • A one arc-minute model would be ideal • Oherwise, approximations are required • CORS better than campaign GPS • Further evaluation awaits final adjustment of GPS campaign data • Water topography issues still remain Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

  11. Questions? Daniel R. Roman Chief Geodesist National Geodetic Survey Joint Assembly of IAG-IASPEI in Kobe, Japan JUly 30 - August 4, 2017

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