1. New Vertical Datum Implementation Plan FGDC Silver Spring, MD. July 30, 2013 Mark C. Eckl Chief of the Observation and Analysis Division, National Geodetic Survey

2. Implementation Plan – 2.2 Replace NAVD 88 Objective: By 2022, reduce all definitional and access related errors in orthometric heights in the geopotential reference frame to 2 centimeters when using 15 minutes of GNSS data.

3. How completion/success is defined 1.All datasheets express heights and velocities in the new vertical datum 2.A Federal Register Notice has been posted noting that the results of this project represent the official U.S. vertical datum 3.. NGS authors publish a few papers - including the official datum definition - in trade magazines, journals, etc. 4.Adoption by FGDC/FGCS

4. Strategies and actions for moving towards achieving this objective Strategy 1: Geodesy Strategy 2: Geodetic Surveying Strategy 3: Product Dissemination Strategy 4: Policy Recommendations

5. Strategy 1: Geodesy ActionEst. Completion dateResponsible Person Compute final geoid1.5 yr. prior to releaseDan Roman Compute a geometric fiducial ref. frame (CORS) 1.5 yr. prior to releaseJoe Evjens Complete a national geometric control adjustment 6 mo. prior to releaseMichael Dennis Evaluate national level line adjustmentOct. 31, 2014Jarir Saleh National readjustment of level lines6 mo. prior to releaseJarir Saleh Enable translations between surfacesat release

6. Strategy 2: Geodetic Surveying ActionEst. Completion dateResponsible Person Develop best practices for ellipsoid ht.3 yr. prior to releaseMichael Dennis Establish absolute / relative standards2 yr. prior to releaseVRSWG Establish specifications for standards1 yr. prior to releaseVRSWG Develop best practices for leveling2 yr. prior to releaseMark Eckl

7. Strategy 3: Product Dissemination ActionEst. Completion dateResponsible Person Determine data reporting products2 yr. prior to release OAD Records Management Branch (RMB) Chief Develop QA/QC procedures 1.5 yr. prior to release OAD Project Analysis Branch (PAB) Chief Develop data transmittal format/methodology 1.5 yr. prior to release RMB/PAB Chiefs

8. Strategy 4: Policy Recommendations ActionEst. Completion dateResponsible Person Set target release date for new datumOct. 31, 2013Mark Eckl Define objectiveOct. 31, 2013Mark Eckl Vertical ref. surface updates6 mo. prior to releaseESC Vertical ref. surface replacement6 mo. prior to releaseESC Approval of new datum from FGCS2 yr. prior to releaseMark Eckl Control ellipsoid ht. replacement6 mo. prior to releaseESC Adopt vertical reference surface1 yr. prior to releaseESC Adopt ellipsoid reference surface1 yr. prior to releaseESC

9. Released Data Processing Partially Complete Planned GRAV-D Block Status and Released Data as of July 30 th, 2013 www.ngs.noaa.gov/GRAV-D