SkyBridge Satellites |
CONSTELLATION DESCRIPTION |
| Number of Satellites |
80 satellites
total
|
| Geometry |
Two 40 satellite sub-constellations
with 20 planes, each containing four satellites. |
| Orbit |
LEO -
Final: 1469 km (885
miles) circular, 53 deg
Parking: 940 km (566 miles) circular, 53 deg |
| Orbit Period |
Final
Orbit: 115.3 minutes
Parking Orbit: 103.8 minutes |
| Coverage
(estimated) |
between 68
degrees North and South Latitude |
| Initiation of Operations |
2002
- Planned |
| Launch
Vehicle(s) |
Ariane
5, Proton, Atlas
3, Delta III |
| PAYLOAD
CAPABILITIES |
| Types of Services |
broadband:
voice, video, data, internet |
| Transmission Rate |
2,400
to 9,600 subscriber uplink
24,000 subscriber downlink
50,000 gateway uplink and downlink |
| Data Rate |
200 Gbps -
max system capacity |
| On-board processing |
No |
| Mobile downlink frequencies |
10.7
to 12.75 GHz (Ku Band) |
| Mobile uplink frequencies |
12.75
to 14.5 GHz (Ku Band) |
| Multiple access scheme |
18
Spot Beams per satellite Right
Hand Circular Polarization ('RHCP') and Left Hand Circular
Polarization ('LHCP') |
| Voice or data circuit capacity
per satellite |
|
| CORE BUS
SPECIFICATIONS |
| Prime Contractor |
Alcatel,
Space Systems Loral |
| Platform |
|
| Launch Mass |
1250
kg (2756
lb) |
| Dry Mass |
1200 kg
(2646
lb) - estimated |
| Design Life |
5
to 7 years |
STRUCTURE |
| Dimensions (H x W x L) |
2 m x 1 m x 4 m (6.6 ft x 3.3 ft x 13.2 ft) |
| Construction |
Composite
Honeycomb |
POWER SYSTEM |
| Payload Power (EOL) |
5
kW - estimated |
| Solar Arrays |
Two
- sun pointing |
ATTITUDE CONTROL SYSTEM |
| Stabilization |
Three
Axis |
