WSF Satellite Bus
Data current as of 2026-07-20.
The WSF bus accounts for 3 cataloged objects, of which 1 are in orbit and 1 are active. 2 have reentered. Most are built by SIIC. The largest operator on this bus is SIIC. The first launched in 1995, the most recent in 2024.
1
In orbit
1
Active
3
Total launched
2
Reentered
WSF launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged WSF satellites.
| Manufacturer | SIIC |
|---|---|
| Purpose | Material research, retrievable |
| Launch mass | 1200 kg |
| Dry mass | 1200 kg |
| Length | 1.8 m |
| Diameter | 3.6 m |
| Span | 3.6 m |
| Shape | Disk |
| Power | Batteries |
| Propulsion | ? |
| Design life | 2 days |
| Typical orbit | 101 min period, 99° inclination |
Top operators
SIIC 2 SFSSC 1
Top countries
US 3
WSF satellites
Track any of them live in KeepTrack.
Frequently asked questions
How many WSF satellites are there?
The catalog lists 3 objects built on the WSF bus. 1 are in orbit and 2 have reentered.
How many WSF satellites are in orbit?
1 WSF objects are currently in orbit, of which 1 carry an active status.
Who builds the WSF bus?
The WSF bus is most commonly built by SIIC.
When did the first WSF satellite launch?
The first cataloged WSF satellite launched in 1995, and the most recent in 2024.