Point of Beginning

GPS-Derived Heights Webinars

September 14, 2009

NOAA’s National Geodetic Survey will present two Webinars on understanding and achieving GPS-derived orthometric heights at centimeter-level accuracy, based on NOAA Technical Memorandums NOS NGS-58 and 59.

Visit www.ngs.noaa.gov/corbin/calendar.shtml to register. (Register separately for each webinar you would like to attend.)

October 6th, 1:00-4:00pm ET

PART 1: DEVELOPMENT AND DESCRIPTION OF NGS GUIDELINES

Dave Doyle
The National Spatial Reference System (NSRS)
Methods for Vertical Control-Obtainable Accuracies, National Standards
Vertical Datums - Tidal, NGVD29, NAVD 88
Ellipsoid Heights
Geoid Heights

Bill Henning
Height Modernization Program Background
NOS/NGS 58 Static GPS Guidelines


October 7th, 1:00-4:00pm ET

GPS-DERIVED HEIGHTS PART II (Webinar)

Agenda

Dave Doyle
Using CORS and OPUS for Heights
Issues with Passive and Active stations

Bill Henning
Implementing NOS/NGS 59 Static Ortho Guidelines
Using NGS Real Time GNSS Positioning Guidelines for Ortho Heights

Dave Doyle
The Future – GRAV-D
Summary