[IGSMAIL-7651] Modernized Reference Frames and Vertical Datums session at AGU

[Dru Smith]

Colleagues,

We invite you to submit abstracts to AGU Fall Meeting session G016 
titled "Modernizing Regional Reference Frames and Vertical Datums for 
North America ".  This session focuses on a broad range of issues 
surrounding all aspects of replacing NAD 83, NAVD 88 and IGLD 85.  A 
sample of topics relevant to this session include:

- Methods for processing GPS Networks, including linear versus 
non-linear velocities and detection of discontinuities
- Detection and correction of CORS whose coordinates drift from 
predicted velocities
- Methodologies for monitoring crustal motion in 3 dimensions
- Tracking changes to the geoid at both regional and continental scales
- Transitioning from epoch-fixed passive geodetic control to 
time-dependent active geodetic control

Submit your abstracts here:
https://agu.confex.com/agu/fm18/g/papers/index.cgi?sessionid=50738

Thank you, and we look forward to seeing you in Washington D.C.!

Dru Smith, Mike Craymer, Dan Roman and John Crowley


Session Description:
-------------------------
In 2022 the existing non-geocentric reference frames of North America 
will be succeeded by a set of modern ones using the latest realization 
of ITRF that is fixed separately to the North American, Caribbean, 
Marianas and Pacific tectonic plates. In addition, all leveling-based 
vertical datums will be replaced with a geoid-based datum incorporating 
continental airborne gravity and new global geopotential model. 
Contributions are invited that address the development, implementation 
and maintenance of such regional reference frames, including: defining a 
geocentric reference system fixed to a moving and deforming continent, 
defining a geoid-based vertical datum, implementing time dependencies 
including geoid change, creating accurate transformations, defining the 
role of private Real-Time Networks, determining dynamic heights, 
building geospatial databases capable of handling historic static data 
along with modern time-dependent data, and collaborations with 
neighboring countries to ensure compatible and seamless reference 
systems across the continent.