USA-319

USA-319, also known as GPS-III SV05, NAVSTAR 81 or Neil Armstrong, is a United States navigation satellite which forms part of the Global Positioning System. It was the fifth GPS Block III satellite to be launched.

Satellite
SV05 is the fifth GPS Block III satellite. Satellite construction was completed in early 2021.

The spacecraft is built on the Lockheed Martin A2100 satellite bus, and weighs approximately 4331 kg.

SV05 is the 24th operational Military Code (M-Code) satellite to join the GPS constellation, the last required for M-Code Full Operational Capability.

Launch
USA-319 was launched by SpaceX on 17 June 2021 at 16:09 UTC, atop Falcon 9 booster B1062. This booster had previously launched SV04 a year prior.

The launch took place from SLC-40 at Cape Canaveral Space Force Station, and placed USA-319 directly into semi-synchronous orbit. About eight minutes after launch, Falcon 9 successfully landed on the droneship Just Read the Instructions.

Orbit
As of 2023, USA-319 was in a 55.3 degree inclination orbit with a perigee of 20,163 km and an apogee of 20,216 km.