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Posted by Sam Wormley on July 27, 2011, 7:05 pm
> ANNOUNCING THE GEOID SLOPE VALIDATION SURVEY 2011
> July 25, 2011
> In partnership with international colleagues and state, local, and university
partners,
> on July 19 NOAA will begin the process of validating the accuracy of
gravimetric
> geoid models, specifically those using data from the GRAV-D (Gravity for
> the Redefinition of the American Vertical Datum) campaign.
> Tests performed over an approximate eleven-week summer schedule will involve
> a comprehensive survey along a 300 km transect from Corpus Christi to Austin,
Texas.
> Measurement techniques to be collected include geodetic leveling,
multi-receiver
> campaign style long session GPS, astro-geodetic deflections of the vertical
using
> the Swiss DIADEM camera, RTN-based GPS, absolute gravity, gravity
> gradients, LIDAR and imagery.
> Through these various measurements, this survey will provide two independent
> determinations of the shape of the geoid that can be used to evaluate the
accuracy
> of gravimetric geoid models.The comparisons will provide a test and calibration
> for the data used to create the next generation vertical datum.
> For more information, see the link below.
>         http://www.ngs.noaa.gov/GEOID/GSVS11/index.shtml

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