NOAA, National Geodetic Survey

HEIGHT MODERNIZATION COORDINATION MEETING

AGENDA

SSMC3, Room 8836

Date:      Thursday, September 13, 2012

Time:      2:00-3:30 pm East Coast time

Call In: 877-988-6989, PASSCODE: 1680881

Webinar: https://www2.gotomeeting.com/register/603779386

Purpose:  To exchange information and provide an update on National Height Modernization activities, events, and issues; to enable better collaboration with our partners and within NOAA to accomplish Height Modernization objectives; to improve NGS’ Products and Services for our constituents.

NOTE: Because interest in the feature topic is expected to be high, the general meeting has been shortened to 5-10 minutes then the topic presentation will begin.

1. Updates from States – e.g. projects, outreach
2. Monthly presentation

Presentation, to start at approximately 2:10 PM: 

GEOID12A

Dan Roman, National Geodetic Survey

NGS has recently released updated models for transforming ellipsoidal coordinates and orthometric (e.g. NAVD 88) heights.  After detecting significant defects in the control data used to create GEOID12, GEOID12A was developed as a replacement.  This presentation will discuss the development of changes in the most recent geoid models.

Daniel R. Roman, Ph.D. (This email address is being protected from spambots. You need JavaScript enabled to view it.), has been a Research Geodesist with NGS since 1999. He is the team lead for Geoid Modeling and Research as well as the Principal Investigator for the Gravity for Redefinition of the American Vertical Datum (GRAV-D) Project. He has participated in development of GEOID99, GEOID03, GEOID06, GEOID09 and associated models. He also leads the scientific effort towards a cm-level geoid height model that will replace NAVD 88 and serve as a future vertical datum. He has a B.S. from the University of Southern California in Geology (1985), a M.S. from the Ohio State University in Physical Geodesy (1993), and a Ph.D. from the Ohio State University in Potential Fields Geophysics (1999). He is a member of the International Association of Geodesy, American Geophysical Union, Canadian Geophysical Union, Society for Exploration Geophysicists, International Federation of Surveyors (FIG), American Congress on Surveying and Mapping, and American Association of Geodetic Surveyors.

3. Other Business
   

Important Links:  Previous months’ meeting notes and a list of future meeting presentations can be found at:  http://www.ngs.noaa.gov/heightmod/MeetingNotes.shtml

The Center for GeoInformatics proposed the CORS station at Loyola University (New Orleans) for inclusion into the National CORS network. This will bring greater integration and ease of access for Louisiana users, including OPUS and archival services available through the NGS portal.

The Loyola CORS station was installed October 18th, 2005 by C4G staffers Tony Cavell and Richard Capone. The station, tentatively named LOYL, has been providing 1sec epoch data since installation.

The NGS OPUS tool is now using GEOID12 for improved NAVD 88 orthometric heights!

 Current frame solutions are consistent with newly-adjusted NGS datasheets. 
Prior frame access will expire on 15 July, 2012.

The GULFNet Real Time Network runs a constrained adjustment to the prior NGS reference frame which is NAD 83 (CORS96) Position (Epoch 2002.0) and is the basis for the NAD 83(2007) adjustment. This reference frame will become obsolete on July 15th, 2012. Due to this, C4G will be taking GULFNet RTN offline on July 16th and reconfiguring the equipment to become backup servers for the C4Gnet RTN running on a constrained adjustment to the current NGS reference frame.

All C4G Real Time Network clients should be switching over to the C4Gnet RTN if they are currently using the GULFNet RTN as this system will not be available after July 15th, 2012.

C4Gnet RTN data are based on the new reference NGS CORS coordinates in IGS08 epoch 2005.00 and NAD 83(2011) Position (Epoch 2010.00) adjustment.

Click Here for more information on coordinates!