NOSS B SSU Satellite Bus
Data current as of 2026-07-20.
The NOSS B SSU bus accounts for 9 cataloged objects, of which 9 are in orbit and 0 are active. Most are built by NRL. The largest operator on this bus is National Reconnaissance Office. The first launched in 1990, the most recent in 1996.
9
In orbit
0
Active
9
Total launched
0
Reentered
NOSS B SSU launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged NOSS B SSU satellites.
| Manufacturer | NRL |
|---|---|
| Purpose | Ocean Surveillance, ELINT |
| Launch mass | 400 kg |
| Dry mass | 400 kg |
| Length | 1 m |
| Diameter | 1 m |
| Span | 10 m |
| Shape | Box + Ant |
| Propulsion | ? |
| Equipment | ? |
| Typical orbit | 106 min period, 63° inclination |
Top operators
National Reconnaissance Office 6 NROC/NRL 3
Top countries
US 9
NOSS B SSU satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| USA 121 USA 121 | 23908 | 1996-029C | NROC/NRL | May 12, 1996 | 107 min, 63.3° | Inactive | ◉ |
| USA 120 USA 120 | 23907 | 1996-029B | NROC/NRL | May 12, 1996 | 107 min, 63.3° | Inactive | ◉ |
| USA 122 USA 119 | 23862 | 1996-029D | NROC/NRL | May 12, 1996 | 260 min, 63.3° | Inactive | ◉ |
| USA 77 USA 77 | 21809 | 1991-076E | NRO/NRL | Nov 8, 1991 | 106 min, 63.3° | Inactive | ◉ |
| USA 76 USA 76 | 21808 | 1991-076D | NRO/NRL | Nov 8, 1991 | 106 min, 63.3° | Inactive | ◉ |
| USA 74 USA 74 | 21799 | 1991-076C | NRO/NRL | Nov 8, 1991 | 106 min, 63.3° | Inactive | ◉ |
| USA 62 USA 62 | 20692 | 1990-050D | NRO/NRL | Jun 8, 1990 | 105 min, 63.3° | Inactive | ◉ |
| USA 61 USA 61 | 20691 | 1990-050C | NRO/NRL | Jun 8, 1990 | 106 min, 63.3° | Inactive | ◉ |
| USA 60 USA 60 | 20682 | 1990-050B | NRO/NRL | Jun 8, 1990 | 105 min, 63.3° | Inactive | ◉ |
Frequently asked questions
How many NOSS B SSU satellites are there?
The catalog lists 9 objects built on the NOSS B SSU bus. 9 are in orbit and 0 have reentered.
How many NOSS B SSU satellites are in orbit?
9 NOSS B SSU objects are currently in orbit, of which 0 carry an active status.
Who builds the NOSS B SSU bus?
The NOSS B SSU bus is most commonly built by NRL.
When did the first NOSS B SSU satellite launch?
The first cataloged NOSS B SSU satellite launched in 1990, and the most recent in 1996.