O2 |
Oxygen |
O and M |
Operation and Maintenance |
OAS |
Orbit Adjust Subsystem |
Ob |
Obliquity of ecliptic |
OB |
Outside Broadcast |
OBE |
Out of Band Emission |
OBM |
Outbound Multiplexer |
OBN |
Out of Band Noise |
OBO |
Output Back Off |
OBP |
On Board Processing |
OCC |
Operation Control Centre |
OCXO |
Oven Controlled Crystal Oscillator |
ODU |
Outdoor Unit |
OECD |
Organisation for Economic Cooperation and Development |
OEM |
Original Equipment Manufacturer |
OFDM |
Orthogonal Frequency Division Multiplex |
OFDMA |
Orthogonal Frequency Division Multiple Access |
OFHC |
Oxygen Free High Conductivity Copper |
OFT |
Orbital Flight Test |
OGO |
Orbiting Geophysical Observatory |
OGS |
Optical Ground Station |
OGSE |
Optical Ground Support Equipment |
OLIT |
Orbital Launch Integration Tower |
OMS |
Orbital Manoeuvring System |
OMT |
Ortho Mode Transducer |
OMT |
Ortho Mode Transition |
OMUX |
Output Multiplexer |
OOK |
On Off Keying |
OPBO |
Output Power Back Off |
OPIP |
Output Power Intercept Point |
OPNAV |
Optical Navigation |
OPSK |
Octal Phase Shift Keying |
OQPSK |
Offset QPSK |
ORB |
Obeyed Reference Burst |
ORBIS |
Orbiting Radio Beacon Ionospheric Satellite |
ORSC |
Oxidiser Rich Staged Combustion |
Osc |
Oscillator |
OSD |
Operational Service Date |
OSI |
Open Systems Interconnection |
OSM |
Operations Safety Manager |
OSN |
Output Switch Network |
OSR |
Optical Solar Reflector |
OSR |
Orbital Solar Reflector |
OSS |
Operational Support System |
OTM |
Orbit Trim Manoeuvre |
OTV |
Orbital Test Vehicle |
OTV |
Orbital Transfer Vehicle |
OUB |
Occasional Use Bands |
OW |
Orderwire |
OWLT |
One Way Light Time |