GPS IIA Satellite Bus
Data current as of 2026-07-20.
The GPS IIA bus accounts for 9 cataloged objects, of which 9 are in orbit and 0 are active. Most are built by RWISB. The largest operator on this bus is AFSMC. The first launched in 1990, the most recent in 1997.
9
In orbit
0
Active
9
Total launched
0
Reentered
GPS IIA launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged GPS IIA satellites.
| Manufacturer | RWISB |
|---|---|
| Purpose | Navigation |
| Launch mass | 860 kg |
| Dry mass | 860 kg |
| Length | 2.4 m |
| Diameter | 1.8 m |
| Span | 5.3 m |
| Shape | Box + 2 Pan |
| Power | 2 deployable solar arrays, batteries |
| Propulsion | Star 37XFP |
| Design life | 7.5 years |
| Equipment | ? |
| Typical orbit | 751 min period, 56° inclination |
Top operators
AFSMC 5 AFSSD2 4
Top countries
US 9
GPS IIA satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| NAVSTAR 44 (USA 135) GPS IIA-19 | 25030 | 1997-067A | AFSMC | Nov 6, 1997 | 764 min, 55.6° | Inactive | ◉ |
| NAVSTAR 39 (USA 128) GPS IIA-18 | 24320 | 1996-056A | AFSMC | Sep 12, 1996 | 772 min, 53.7° | Inactive | ◉ |
| NAVSTAR 38 (USA 126) GPS IIA-17 | 23953 | 1996-041A | AFSMC | Jul 16, 1996 | 763 min, 56.0° | Inactive | ◉ |
| NAVSTAR 27 (USA 84) GPS IIA-6 | 22108 | 1992-058A | AFSMC | Sep 9, 1992 | 768 min, 54.7° | Inactive | ◉ |
| NAVSTAR 26 (USA 83) GPS IIA-5 | 22014 | 1992-039A | AFSMC | Jul 7, 1992 | 766 min, 55.5° | Inactive | ◉ |
| NAVSTAR 25 (USA 80) GPS IIA-4 | 21930 | 1992-019A | AFSSD2 | Apr 10, 1992 | 767 min, 54.9° | Inactive | ◉ |
| NAVSTAR 24 (USA 79) GPS IIA-3 | 21890 | 1992-009A | AFSSD2 | Feb 23, 1992 | 751 min, 54.2° | Inactive | ◉ |
| NAVSTAR 23 (USA 71) GPS IIA-2 | 21552 | 1991-047A | AFSSD2 | Jul 4, 1991 | 751 min, 56.5° | Inactive | ◉ |
| NAVSTAR 22 (USA 66) GPS IIA-1 | 20959 | 1990-103A | AFSSD2 | Nov 26, 1990 | 765 min, 56.2° | Inactive | ◉ |
Frequently asked questions
How many GPS IIA satellites are there?
The catalog lists 9 objects built on the GPS IIA bus. 9 are in orbit and 0 have reentered.
How many GPS IIA satellites are in orbit?
9 GPS IIA objects are currently in orbit, of which 0 carry an active status.
Who builds the GPS IIA bus?
The GPS IIA bus is most commonly built by RWISB.
When did the first GPS IIA satellite launch?
The first cataloged GPS IIA satellite launched in 1990, and the most recent in 1997.