GPS · Navigation
NAVSTAR 39 (USA 128)
NonoperationalNavigationMEO
NAVSTAR 39 (USA 128) is a U.S. Space Force navigation satellite, part of the GPS constellation, launched on September 12, 1996 into MEO.
Loading…
Launch
- Launch date
- September 12, 1996 at 08:49 AM UTC
- Launch site
- Cape Canaveral SFS, USA
- Launched by
- Delta II 7925 →
- Operator
- United States Air Force
- Mission
- GPS IIA-18
- Launch record
- View full launch →
Orbit
- Orbit regime
- MEO
- Apoapsis
- 21,588 km
- Periapsis
- 21,414 km
- Inclination
- 53.71°
- Orbital period
- 772.12 min
Spacecraft
- Operator
- U.S. Space Force
- Manufacturer
- Lockheed Martin
- Users
- Government/Military
- Launch mass
- 921.7 kg
- Design lifetime
- 15 years
- Detailed purpose
- Navigation
Identity
- COSPAR (Int'l)
- 1996-056A
- NORAD catalog №
- 24320
- Object type
- Payload
- Owner / operator
United States- Constellation
- GPS
- Radar cross-section
- 3.1622 m²
- Status
- Nonoperational
End of mission
- Fate
- No longer operational — remains in orbit as inactive.
- Final status
- Nonoperational
Related news
Xona secures spectrum approval for 250-satellite navigation network
SpaceNews · 5d ago
Air Force takes over troubled military GPS receiver program
SpaceNews · 15d ago
Finding solutions to jamming and spoofing
SpaceNews · 1mo ago
NASA Mission to Study Space Weather Impacts of Earth’s Atmosphere
NASA · 1mo ago
Space Force orders two more GPS satellites from Lockheed Martin for $514 million
SpaceNews · 1mo ago
Russia is jamming GPS from space
SpaceNews · 2mo ago
HASC NDAA markup challenges Space Force on satellite programs
SpaceNews · 2mo ago
Electronics manufacturer Murata to explore Xona satellite timing service for telecom, data centers
SpaceNews · 2mo ago
Live coverage: SpaceX to launch final GPS III satellite for the U.S. Space Force
Spaceflight Now · 3mo ago
Launch Preview: GPS, Progress, and Starlink missions to launch during busy week
NASASpaceflight · 3mo ago
The future of GPS satellites with Fang Qian of Lockheed Martin
SpaceNews · 3mo ago
Lockheed Martin wins $105 million contract for GPS ground control system as OCX winds down
SpaceNews · 4mo ago