SSTL-300S1 Satellite Bus
Data current as of 2026-07-20.
The SSTL-300S1 bus accounts for 4 cataloged objects, of which 4 are in orbit and 4 are active. Most are built by SSTLA. The largest operator on this bus is DMC. The first launched in 2015, the most recent in 2018.
4
In orbit
4
Active
4
Total launched
0
Reentered
SSTL-300S1 launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged SSTL-300S1 satellites.
| Manufacturer | SSTLA |
|---|---|
| Purpose | Earth Observation |
| Launch mass | 447 kg |
| Dry mass | 435 kg |
| Length | 2.5 m |
| Diameter | 1 m |
| Span | 2.5 m |
| Shape | Hept prism+cyl |
| Power | Solar cells, batteries |
| Design life | 7 years |
| Equipment | 1-meter panchromatic imager, 4-meter imager in 3 spectral bands |
| Typical orbit | 97 min period, 98° inclination |
Top operators
DMC 3 SSTLA 1
Top countries
UK 4
SSTL-300S1 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| SSTL S1-4 S1-4 | 43618 | 2018-071A | SSTLA | Sep 16, 2018 | 96 min, 97.5° | Active | ◉ |
| DMC3-FM3 DMC3-3 | 40717 | 2015-032C | DMC | Jul 10, 2015 | 97 min, 97.7° | Active | ◉ |
| DMC3-FM2 DMC3-2 | 40716 | 2015-032B | DMC | Jul 10, 2015 | 97 min, 97.6° | Active | ◉ |
| DMC3-FM1 DMC3-1 | 40715 | 2015-032A | DMC | Jul 10, 2015 | 97 min, 97.6° | Active | ◉ |
Frequently asked questions
How many SSTL-300S1 satellites are there?
The catalog lists 4 objects built on the SSTL-300S1 bus. 4 are in orbit and 0 have reentered.
How many SSTL-300S1 satellites are in orbit?
4 SSTL-300S1 objects are currently in orbit, of which 4 carry an active status.
Who builds the SSTL-300S1 bus?
The SSTL-300S1 bus is most commonly built by SSTLA.
When did the first SSTL-300S1 satellite launch?
The first cataloged SSTL-300S1 satellite launched in 2015, and the most recent in 2018.