System Delta 831

The System Delta 831 (SYD 831) is a unit of the United States Space Force.^[1] The unit's mission is to support Space Systems Command’s Military Communications & Positioning, Navigation, and Timing (MCPNT) Program Executive Office and will work in conjunction with Space Mission Delta 31.^[2]

System Delta 831
Active	October 2, 2025 - present
Country	United States
Allegiance	Space Systems Command
Branch	United States Space Force
Size	Delta
Garrison/HQ	Los Angeles Air Force Base
Commanders
Current commander	Col. Neil B. Barnas

Mission

The unit will be fielding and developing integrated Global Positioning Systems satellites to deliver MCPNT to US military forces, international partner forces and civilian companies.^[3][4] “GPS is also critical infrastructure to our nation’s economy and transportation networks. In this new era of a contested space domain, we must think differently about how we develop, deliver, and modernize our Navigation Warfare systems to ensure we stay ahead of the threat and secure our way of life," said Col. Neil Barnas the unit's first commander.^[5] SYD 831 combines engineering, program management, logistics, finance and contracting into one unit.^[2]