biconical omni-directional antenna
catadioptric omni-directional image
Catadioptric Omni-directional Imaging
Circular polarized omni-directional
ground based electronic omni-directional satellite communications antenna
OBD Omni bearing Distance System
ODR Omni – Directional Range
ODR Omni C Directional Range
omni - axial random vibration
omni antenna at the master station
omni directional analytical linear method