European GNSS Agency was created in 2004.

The ILS Z is an Instrument Approach Procedure which requires a GNSS capability to be executed. Though the the ILS information regarding the Localizer (Runway axis) and Glide Slope are the same for the any ILS, this one demands that before joining the ILS itself the aircraft has to fly through waypoints that can only be flown using the GNSS capabilities of the aircraft. Besides that, the Missed Approach segment of the procedure also requires GNSS capability.

Note: GNSS stands for Global Navigation Satellite System.

Augmentation Research Center was created in 196#.

Augmentation is the action or process of making or becoming greater in size or amount. You can use it in a sentence like the lady is considering breast augmentation.

A reference system in GNSS is needed to establish a common framework for determining the positions of satellites and receivers on Earth. This system provides a consistent coordinate system that allows accurate positioning and navigation globally. Without a reference system, it would be challenging to interpret and use the satellite data collected for navigation purposes.