DSP B18 Satellite Bus
Data current as of 2026-07-20.
The DSP B18 bus accounts for 6 cataloged objects, of which 6 are in orbit and 3 are active. Most are built by TRW. The largest operator on this bus is AFSMC. The first launched in 1997, the most recent in 2007.
6
In orbit
3
Active
6
Total launched
0
Reentered
DSP B18 launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged DSP B18 satellites.
| Manufacturer | TRW |
|---|---|
| Purpose | Early Warning |
| Launch mass | 2360 kg |
| Dry mass | 2200 kg |
| Length | 10 m |
| Diameter | 3.3 m |
| Span | 11.5 m |
| Shape | Cyl + 2 Pan |
| Power | 4 deployable fixed solar arrays, solar cells, batteries |
| Propulsion | MRE-4 |
| Equipment | ? |
| Typical orbit | 1436 min period, 13° inclination |
Top operators
AFSMC 6
Top countries
US 6
DSP B18 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| USA 197 (DSP 23) DSP F23 | 32287 | 2007-054A | AFSMC | Nov 11, 2007 | 1502 min, 5.3° | Inactive | ◉ |
| USA 176 (DSP 22) DSP F22 | 28158 | 2004-004A | AFSMC | Feb 14, 2004 | 1436 min, 12.1° | Active | ◉ |
| USA 159 (DSP 21) DSP F21 | 26880 | 2001-033A | AFSMC | Aug 6, 2001 | 1452 min, 12.8° | Active | ◉ |
| USA 149 (DSP 20) DSP F20 | 26356 | 2000-024A | AFSMC | May 8, 2000 | 1436 min, 13.2° | Active | ◉ |
| USA 142 (DSP 19) DSP F19 | 25669 | 1999-017A | AFSMC | Apr 9, 1999 | 618 min, 29.1° | Inactive | ◉ |
| USA 130 (DSP 18) DSP F18 | 24737 | 1997-008A | AFSMC | Feb 23, 1997 | 1454 min, 14.4° | Inactive | ◉ |
Frequently asked questions
How many DSP B18 satellites are there?
The catalog lists 6 objects built on the DSP B18 bus. 6 are in orbit and 0 have reentered.
How many DSP B18 satellites are in orbit?
6 DSP B18 objects are currently in orbit, of which 3 carry an active status.
Who builds the DSP B18 bus?
The DSP B18 bus is most commonly built by TRW.
When did the first DSP B18 satellite launch?
The first cataloged DSP B18 satellite launched in 1997, and the most recent in 2007.