Does anybody know the units of the height attribute n the Cartographic object?

Does anybody know the units of the height attribute n the Cartographic object? Sorry if this question has been asked and answered previously.

The reason why the question is being asked, is that DTED data typically uses meters to describe the height above the ellipsoid, aircraft typically use ft, and satellites typically use km to describe height.

Meters above the ellipsoid.

http://cesiumjs.org/Cesium/Build/Documentation/Cartographic.html