What is the definition of ECEF?

Stands for Earth-centred-Earth-fixed. ECEF is a coordinate-ordinate system. The X-coordinate is in the Earth’s equatorial plane with reference to the Greenwich prime meridian. The Z-axis points to the North pole. The Y-axis is in the equatorial plane 90° from the X-axis. This orientation forms a right-handed X-Y-X coordinate system.

What other terms are related to ECEF?

Read more about ECEF or related topic


Advanced Navigation’s glossary covers the most common terms and definitions used in inertial navigation systems, acoustic positioning and robotics.

All terms

Search by alphabetic order