Iridium's payload
|
Modulation
|
TDMA
(Time Division Multiple Access)
|
|
Capacity
|
3840
phone circuits
|
|
Voice
|
4800
bps
|
|
Fax
|
2400
bps
|
|
Data
|
2400
bps
|
|
Total
Bandwith
|
200
MHz
|
|
Mobile
links
|
1.5/1.6
GHz
|
|
Intersatellite
links
|
Ka-band:
18.8-20.2/27.5-30 GHz
|
On-board commutation. Inter satellite links, each satellite talks with its 4
neighbors
Communications between the gateways and the satellites: Uplink: 29.1-29.3 GHz,
Downlink: 19.4-19.6 GHz
Payload built by Motorola's Satcom division in Chandler, Arizona.