Icrf

Implementation of the International Celestial Reference Frame (ICRF) for the Earth Inertial Frame is complete, along with definitions for Earth Orientation Parameters (EOP) as specified by the International Earth Rotation Service (IERS) for use with defining ICRF with respect to the observed Fixed Frame of the Earth.

CZML visualization has been updated so that positions can now be expressed in "Fixed" or "Inertial" frames.  This means that in 3D, the polylines for orbital trajectories specified in "Inertial" will now show up as familiar elliptical shapes and those in "Fixed" (as is the case currently) will be the complex looping curves created from showing the positions over time as defined in the Earth's rotating frame (even if the camera is not fixed to the Earth).