# Global Positioning System III - Operational Control Segment — Program Element 1206423SF

**Program element:** 1206423SF  
**Component:** U.S. Space Force  
**Appropriation:** 3620F — RDT&E, Space Force  
**Budget Activity:** 7 — Operational System Development  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/1206423SF

## Summary

U.S. Space Force funding ramps 28% to a $332.3M request in FY2027 — the program's peak, before stepping down 98% across the five-year plan. In the FY2027 defense authorization, the House funded it in full; the Senate cut 29% (to $234.3M); House appropriators cut 62% (to $125.0M). RTX / Raytheon leads the industry work.

## Funding profile

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 263.4 |
| FY2026 | Enacted | 260.2 |
| FY2027 | Request | 332.3 |
| FY2028 | Outyear | 73.7 |
| FY2029 | Outyear | 29.6 |
| FY2030 | Outyear | 16.9 |
| FY2031 | Outyear | 7.0 |

> Estimate types are not summed — the profile mixes actuals, enacted law, the request, and outyear projections.

## Congressional marks (FY2027)

| Stage | Marked ($M) | Change ($M) |
|---|---|---|
| Request | 332.3 | — |
| House NDAA (HASC) | 332.3 | +0.0 |
| Senate NDAA (SASC) | 234.3 | −98.0 |
| House Approps (HAC-D) | 125.0 | −207.3 |

> FY2027 NDAA authorization marks, as of 2026-07-27. Not appropriations or final law.

## Projects (2)

| Project | Title | FY2025 actual | FY2026 enacted | FY2027 request | Move |
|---|---|---|---|---|---|
| 67A021 | OCX | 184.1 | 190.3 | 222.2 | +17% |
| 67A023 | OCX Block 3F | 79.3 | 69.8 | 110.1 | +58% |

> Projects are the summable leaves: the program element total is their sum, never added to it.

### Project 67A021 — OCX

Mission Delta 31 is developing the Next Generation Operational Control System (OCX) (Project 67A021) for Guardians across Position, Navigation, and Timing. As a result, the Service will improve readiness and operational reach of existing force structure. OCX acquisition was established to: 1) provide command and control of legacy and GPS III satellites; 2) incorporate situational awareness to support Navigation Warfare (NAVWAR) and signal monitoring; 3) enable mission capability upgrades to support a warfighter effects-based approach to operations; and 4) integrate DoW information assurance and cybersecurity controls and capabilities. OCX funds will support efforts such as engineering studies and analyses, architectural engineering studies, trade studies, technology needs forecasting, technology development, systems engineering, system development, test and evaluation efforts, pre-operational support activities, and interim contractor support, in support of upgrades and product improvements for military and civil applications necessary to support efforts to protect the United States military and Allies' use of GPS. Additionally, funds will ensure efforts to meet Joint Requirements Oversight Council (JROC) approved required capabilities. OCX Block 0 is the Launch and Checkout System (LCS) intended to conduct Launch and Early Orbit (LEO) operations and the on-orbit checkout of all GPS III satellites. The 2nd Space Operations Squadron (2SOPS) can also call upon OCX Block 0 capabilities at any time to support GPS III anomaly resolution activities. OCX Block 0 is a subset of OCX Block 1. OCX Block 1 fields the operational capability to control all legacy satellites, the legacy civil signal (L1C/A), the legacy military signals (L1P(Y), L2P(Y)) as well as the GPS III satellites and the modernized civil signal (L2C) and the aviation safety-of-flight signal (L5). In addition, Block 1 will field the basic operational capability to control the modernized military signals (L1M and L2M M-Code), and the globally compatible signal (L1C). OCX Block 2 fields the advanced operational capability to control the advanced features of the modernized military signals (L1M and L2M M-Code). Architecture Evolution Plan (AEP), also known as Operational Control Segment (OCS), is the legacy operational control segment for GPS.

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| OCX Development | 180.2 | 112.3 | — |
| Technical Support | 3.9 | 5.6 | — |
| Architecture Evolution Plan Modernization | — | 72.5 | 222.2 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 67A023 — OCX Block 3F

Mission Delta 31 is developing the Next Generation Operational Control System 3 Follow-on (OCX 3F) (Project 67A023) for Guardians across Position, Navigation, and Timing. As a result, the Service will improve readiness and operational reach of existing force structure. OCX Block 3 Follow-on (OCX 3F) will modify OCX Command and Control (C2) for new Global Positioning System (GPS) III Follow-On (GPS IIIF) satellites and Military GPS User Equipment (MGUE) system capabilities, including Regional Military Protection (RMP) high-powered military signal to strengthen U.S. and allied forces' GPS resiliency in contested environments to mitigate future threats, and the ability to rapidly reconfigure GPS IIIF satellites to create time-critical warfighter effects. OCX 3F will maintain backward compatibility with the existing OCX capabilities to support the legacy GPS constellation as well as GPS IIIF. OCX 3F includes critical functions necessary to launch, command, control, and monitor GPS IIIF spacecraft, collect and integrate RMP high-power regional Military Code (M-Code) signals for rapid warfighter effects, and support GPS IIIF auxiliary payloads, including Search and Rescue (SAR) and Nuclear Detonation (NUDET) Detection System (NDS).

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** RTX / Raytheon (88.9, 81%), TASC (3.8, 3.5%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| OCX Block 3F | 79.3 | 69.8 | 110.1 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

## Where the FY2027 request goes

| Category | Share | $M |
|---|---|---|
| Industry primes | 28% | 92.7 |
| Other / unspecified | 72% | 239.6 |

**Top named industry performers:** RTX / Raytheon ($88.9M, 27%).

> R-3 exhibit contract funding, not USAspending obligations.

## Mission & acquisition strategy

Mission Delta 31 is developing the Next Generation Operational Control System (OCX) and OCX 3F (Project 67A021, 67A023) for Guardians across Position, Navigation, and Timing. As a result, the Service will improve readiness and operational reach of existing force structure. Program Element (PE) 1206423SF funds Research, Development, Test and Evaluation (RDT&E) for the Next Generation Operational Control System (OCX), which includes OCX Blocks 0, 1, and 2, and the upgrade to OCX called OCX Block 3F (OCX 3F), which incorporates Regional Military Protection (RMP) and command and control functionality for GPS III Follow-on (GPS IIIF) satellites.

OCX Block 3F is a separate Acquisition Category (ACAT) II program tailored to enhance and integrate with the OCX baseline. It is part of the overall GPS Enterprise Modernization effort. The OCX 3F development contract was awarded sole source to Raytheon Intelligence and Space on 29 Apr 21. The OCX 3F program uses an agile software development approach to upgrade the OCX system to support the first GPS IIIF satellite launch, while also maintaining backwards compatibility for C2 of the existing GPS satellite constellation. The program formally entered the Over-Target Baseline / Over-Target Schedule (OTB/OTS) re-baselining process on 30 May 24.

## Related program elements

- [1203154SF — Long Range Kill Chains](https://hitchintel.com/programs/1203154SF) (Space Force)
- [1203269SF — GPS III Follow-On (GPS IIIF)](https://hitchintel.com/programs/1203269SF) (Space Force)
- [0604003F — Advanced Battle Management System (ABMS)](https://hitchintel.com/programs/0604003F) (Air Force)
- [0605514M — Ground BASED Anti-ship Missile](https://hitchintel.com/programs/0605514M) (Navy)

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibits R-2/R-3, PE 1206423SF (PB PB2027); FY2027 NDAA committee marks (as of 2026-07-27).
- **MCP:** `mcp.hitchintel.com` — `budget_get_program_element(pe="1206423SF")`.

*HitchAI is an independent intelligence service, not affiliated with the U.S. Department of Defense. Budget figures are requests/estimates, not obligations.*