|
Technical Specifications
The BLOCK IIA satellites, SVNs 22 through 40, were
the second series of operational GPS satellites. Block IIA
satellites were designed to provide 180 days of operation without
contact from the control segment. During the 180 day autonomy,
degraded accuracy is evident in the navigation message.
NAVSTAR GPS/Block IIA Satellites |
| PAYLOAD
CAPABILITIES |
| Types of Services |
Navigation |
| Downlink frequencies |
1572.42 MHz and 1227.6 MHz (L-Band) 2227.5
MHz (S-Band) |
| CORE BUS
SPECIFICATIONS |
| Prime Contractor |
Rockwell
International |
| Platform |
-
|
| Launch Mass |
1816
kg (4002 lbm) |
| Design Life |
7.5
years |
STRUCTURE |
| Dimensions (H x W x L) |
|
| Construction |
aluminum
honeycomb panels |
POWER SYSTEM |
| Payload Power
(EOL) |
0.710
kW |
| Solar Arrays |
2
silicon panels |
| Batteries |
3
- 35 cell Ah NiCd |
ATTITUDE CONTROL SYSTEM |
| Stabilization |
3-axis
stabilized |
|
