Horizontally, the WISCORS is on the NAD 83 (2007) datum. Vertically, we only provide the Height Above the Ellipsoid (HAE), and the HAE is a component of the NAD 83 (2007) ellipsoid. In order to predict an NAVD 88 elevation, you must apply a geoid model (Geoid09) to the HAE to come up with a vertical component. The horizontal and height information is to an internal antenna reference point, and not a physical mark on the ground. Using proven calibration methodologies and techniques, you will be able to utilize the WISCORS network for any horizontal and vertical datum that you need to work on.