| USA-309 | |
| Names List: | Navstar 80 GPS-III SV04 Sacagawea |
| Mission Type: | Navigation |
| Operator: | USSF |
| Cospar Id: | 2020-078A |
| Satcat: | 46826 |
| Mission Duration: | 15 years (planned) |
| Spacecraft: | GPS-III SV04 |
| Spacecraft Type: | GPS Block III |
| Manufacturer: | Lockheed Martin |
| Launch Mass: | 4331 kg |
| Power: | watts |
| Launch Date: | 5 November 2020, 23:24 UTC |
| Launch Rocket: | Falcon 9 B1062.1 |
| Launch Site: | Cape Canaveral, SLC-40 |
| Launch Contractor: | SpaceX |
| Orbit Reference: | Geocentric orbit |
| Orbit Regime: | Medium Earth orbit (Semi-synchronous orbit) |
| Orbit Inclination: | 54.9° |
| Orbit Period: | 718.0 minutes |
| Apsis: | gee |
USA-309, also known as GPS-III SV04, NAVSTAR 80 or Sacagawea, is a United States navigation satellite which forms part of the Global Positioning System. It was the fourth GPS Block III satellite to be launched.[1]
SV04 is the fourth GPS Block III satellite to be launched. Launch was pushed back several times due to delays with the earlier satellites.[2]
The spacecraft is built on the Lockheed Martin A2100 satellite bus, and weighs in at .[3]
USA-309 was launched by SpaceX on 5th of November 2020 at 23:24 UTC atop Falcon 9 booster B1062.[4] The launch took place from SLC-40 of the Cape Canaveral Air Force Station, and placed USA-309 directly into semi-synchronous orbit. About eight minutes after launch, Falcon 9 B1062 successfully landed on the droneship Of Course I Still Love You.
As of 2021, USA-309 was in a 54.9 degree inclination orbit with a perigee of 20181km (12,540miles) and an apogee of .[5]