Future Efforts
•Aerogravity must be downward continued or otherwise combined with existing surface gravity data
•Clean up gravity DB by combining airborne gravity and surface absolute gravity as tie points
•Develop new methods of geoid computation using cleansed gravity DB, suitable EGM and DEM’s
•Lidar data used to evaluate Mean Dynamic Topography (MDT)
•The models need to be compared for mutual validation:
–Geoid + MDT + Tide = lidar-obs instantaneous sea surface
•The next study area will flow from the Florida panhandle through Louisiana into Texas along the Gulf coast
•MDT issues aren’t as severe there, but terrestrial subsidence issues are very significant in Louisiana
•Proof of concept for a larger production in FY08 and beyond
•Ultimately, these data must be fused with forthcoming Earth Gravity Models and terrain models to yield seamless gravity and geoid models across North America