SBS 4 (PAM-D) |
USA |
| Designation | 15235 / 84093B |
| Launch date | 30 Aug 1984 |
| Launch site | KSC, LC-39A |
| Launch vehicle | Shuttle STS-41D |
| Mission | Telecommunications |
| Geostationary orbit: | |
| Begin | End | Position |
| L: 31 Aug 1984 | ? | |
| < May 1992 | Oct 1992 > | 91°W |
| < Oct 1993 | 77°W, inclined | |
| 20 Jan 2004 | 234° E |
| Prime contractor | Hughes |
| Platform | HS-376 |
| Mass at launch | 1241 kg |
| Mass in orbit | 725 kg |
| Diameter | 2.16 m |
| Height | 2.82 m (6.6 m stowed) |
| Stabilization | Spin stabilized |
| DC power | 1100 W |
| Design lifetime | 7 years |
| Main transponders | 10 |
| Backup transponders | 4 |
| Power | 5 transponders of 20 W (TWTA) 5 transponders of 40 W (TWTA) |
| Bandwidth | 43 MHz |
| Coverage | CONUS |
| EIRP max | 46 dBW |
| Polarization | linear H |
| Horizontal Downlink |
Transponder | Vertical Uplink |
| 11.725 | 1 | 14.025 |
| 11.780 | 2 | 14.080 |
| 11.823 | 3 | 14.123 |
| 11.872 | 4 | 14.172 |
| 11.921 | 5 | 14.221 |
| 11.970 | 6 | 14.270 |
| 12.019 | 7 | 14.319 |
| 12.068 | 8 | 14.368 |
| 12.117 | 9 | 14.417 |
| 12.166 | 10 | 14.466 |