OTS Satellite Bus
Data current as of 2026-07-20.
The OTS bus accounts for 3 cataloged objects, of which 3 are in orbit and 0 are active. Most are built by BAES. The largest operator on this bus is European Space Agency. The first launched in 1978, the most recent in 1984.
3
In orbit
0
Active
3
Total launched
0
Reentered
OTS launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged OTS satellites.
| Manufacturer | BAES |
|---|---|
| Purpose | Communication |
| Launch mass | 431 kg |
| Dry mass | 365 kg |
| Length | 2.5 m |
| Diameter | 2 m |
| Span | 13.8 m |
| Shape | Box + 2 Pan |
| Power | 2 deployable solar arrays, batteries |
| Propulsion | Mage 2 |
| Design life | 7 years |
| Equipment | 1 (+1) L-band, 1 (+1) C-band |
| Typical orbit | 1452 min period, 8° inclination |
Top operators
Top countries
I-ESA 3
OTS satellites
Track any of them live in KeepTrack.
Frequently asked questions
How many OTS satellites are there?
The catalog lists 3 objects built on the OTS bus. 3 are in orbit and 0 have reentered.
How many OTS satellites are in orbit?
3 OTS objects are currently in orbit, of which 0 carry an active status.
Who builds the OTS bus?
The OTS bus is most commonly built by BAES.
When did the first OTS satellite launch?
The first cataloged OTS satellite launched in 1978, and the most recent in 1984.