Glossary

Downlink
Link from Satellite to earth Station
DSL
Digital Subscriber Line. Equivalent of a high quality internet access
Equatorial Orbit
An orbit in the same plane as the equator. Orbit time depends onthe distance to earth
Fi2
Fiber 2.0
FSS
Fixed Satellite Services
FTTH
Fiber to the home
Gbps
Gigabit per second, or 1,000,000,000 binary unit in one second
GEO
Geostationary Earth Orbit
Gimballed Antenna
The steerable antenna mounted to the satellite and manufactured by MDA for Thales Alenia Space.
HSDPA
High-Speed Downlink Packet Access. A third generation mobile telephony data transfer methodology
IP
Internet Protocol
ISP
Internet Service Provider
ITU
International Telecommunications Union
Ka band
Frequencies around 17 - 30 GHz with 2,800 MHz of bandwidth available which can be reused many times over by different spot beams
Latency
The time delay between data leaving the satellite and reaching the ground network or vice versa.
LSC
Launch Services Contract signed between O3b America LLC and Arianespace
LTE
Long Term Evolution. Cellular 4th generation technologies
Mbps
Mega bits per second
MEO
Medium Earth Orbit
MHz
Mega Hertz
Modem
Modulator and Demodulator taken together
Ms
Expression for a unit of time for milliseconds
MSA
Master Services Agreement, the agreement between O3b and its customers for take-or-pay leasing of capacity
OC-12
A bandwidth of 622.08 Mbps of capacity. Now available on satellite technology through O3b Networks
PCD
Project Completion Date
PLCR
Project Life Cover Ratio
RF
Radio Frequency – The O3b system operates at Ka band in the RF spectrum.
RfP
Request for Proposal
SCC
Satellite Control Center
SCPC
Single Channel per Carrier
TDMA
Time Division Multiple Access - Channel shared by multiple users on a time slot basis
TT&C
Tracking, Telemetry and Command
TWTA
Traveling Wave Tube Amplifier
Uplink
Link from Earth Station to Satellite
VPN
Virtual Private Network – system to secure and encrypt private network monitoring and control information for communications over the internet.