ICO Satellites |
CONSTELLATION DESCRIPTION |
| Number of Satellites |
12 (10 Active) |
| Geometry |
2 planes, 6 satellites each |
| Orbit |
MEO - 10,390 km (6,259 miles)
circular at 45 degrees inclination |
| Orbit Period |
361 minutes |
| Coverage |
Global |
| Initiation of Operations |
3Q 2000
(Planned) |
| Launch Vehicle(s) |
Delta III |
| PAYLOAD
CAPABILITIES |
| Types of Services |
voice, data, fax, short message service |
| Voice Transmission Rate (bps) |
4800 |
| Data Rate (bps) |
2400-9600 |
| On-board processing |
Yes |
| Mobile downlink frequencies
(MHz) |
1980 - 2010 |
| Mobile uplink frequencies
(MHz) |
2170-2200 |
| Modulation |
TDMA |
| Maximum earth-space link
one-way propagation delay |
48 ms |
| Minimum mobile terminal
elevation angle |
10 degrees |
| Voice circuit capacity /
satellite |
4500 |
| CORE BUS
SPECIFICATIONS |
| Prime Contractor |
Hughes Space
and Communications |
| Platform |
HS601 |
| Launch Mass |
2750 kg (6050
lb) |
| Design Life |
12 years |
STRUCTURE |
| Dimensions (H x W x L) |
2.3m x 2.3m x 4.7m (7.5ft x 7.5 ft x 15.5ft) |
| Construction |
honeycomb
|
POWER SYSTEM |
| Payload Power (EOL) |
8700 W |
| Solar Arrays |
2 solar
tracking wings (4 panel) |
PROPULSION SYSTEM |
| Reaction Control System |
Monopropellant |
ATTITUDE CONTROL SYSTEM |
| Stabilization |
3-axis |
