SSU C Satellite Bus
Data current as of 2026-07-21.
The SSU C bus accounts for 5 cataloged objects, of which 5 are in orbit and 0 are active. Most are built by LMSC. The largest operator on this bus is National Reconnaissance Office. The first launched in 1972, the most recent in 1983.
5
In orbit
0
Active
5
Total launched
0
Reentered
SSU C launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged SSU C satellites.
| Manufacturer | LMSC |
|---|---|
| Purpose | ELINT, SIGINT |
| Launch mass | 120 kg |
| Dry mass | 100 kg |
| Length | 1.5 m |
| Diameter | 0.4 m |
| Span | 1.5 m |
| Shape | Box + Ant |
| Power | Solar cells, batteries |
| Propulsion | 2 x kick motors |
| Equipment | ? |
| Typical orbit | 115 min period, 97° inclination |
Top operators
Top countries
US 5
SSU C satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| OPS 3899 OPS 3899 | 14139 | 1983-060C | NRO/SAFSP | Jun 20, 1983 | 111 min, 96.7° | Inactive | ◉ |
| OPS 1292 OPS 1292 | 11852 | 1980-052C | NRO/SAFSP | Jun 18, 1980 | 112 min, 96.6° | Inactive | ◉ |
| OPS 6381 (SSU 1) SSU 1 | 07937 | 1975-051C | NRO/SAFSP | Jun 8, 1975 | 114 min, 95.1° | Inactive | ◉ |
| OPS 6630 (2) OPS 6630 P/L 2 | 06938 | 1973-088D | NRO/SAFSP | Nov 10, 1973 | 115 min, 96.9° | Inactive | ◉ |
| OPS 8314 (2) OPS 8314/2 | 06822 | 1972-079C | NRO/SAFSP | Oct 10, 1972 | 115 min, 95.6° | Inactive | ◉ |
Frequently asked questions
How many SSU C satellites are there?
The catalog lists 5 objects built on the SSU C bus. 5 are in orbit and 0 have reentered.
How many SSU C satellites are in orbit?
5 SSU C objects are currently in orbit, of which 0 carry an active status.
Who builds the SSU C bus?
The SSU C bus is most commonly built by LMSC.
When did the first SSU C satellite launch?
The first cataloged SSU C satellite launched in 1972, and the most recent in 1983.