# GPS Ground Segment Monitor Station Service (MSS)

Notice 6bb4cb10b49644faa217029ff36b6a3d (solicitation SSC-GCS-MSS-SSN-2026) from DEPT OF DEFENSE, FA8807 MIL COMM AND PNT SSC/CGK, posted 2026-11-12, responses due 2026-12-08T22:00:00.000Z. Status: open.

| Field | Value |
| --- | --- |
| Notice ID | 6bb4cb10b49644faa217029ff36b6a3d |
| Solicitation number | SSC-GCS-MSS-SSN-2026 |
| Type | Sources Sought |
| Agency | DEPT OF DEFENSE |
| Sub-tier | DEPT OF THE AIR FORCE |
| Office | FA8807 MIL COMM AND PNT SSC/CGK |
| Posted | 2026-11-12T16:34:52.000Z |
| Response deadline (UTC) | 2026-12-08T22:00:00.000Z |
| Set-aside | No Set aside used |
| NAICS | 541715 |
| PSC | 1677 |
| Place of performance | - |
| Award | - |

## Description

Section 1: General Information Pursuant to Revolutionary Federal Acquisition Regulation (FAR) Overhaul (RFO) 15.101(c), this is a Sources Sought Notice/ Request for Information (RFI) only. This notice is issued solely for conducting market research and planning purposes in accordance with RFO Part 10 and RFO Part 5. This announcement is for Market Research only and does not constitute a commitment, promise, or obligation by the Government to issue a Request for Proposal (RFP), Invitation for Bid (IFB), or solicitation of any kind. The Government will not award a contract based on responses to this notice. The Space Force Portfolio Acquisition Executive (SFPAE) for Satellite Communications and Positioning, Navigation and Timing (SATCOM and PNT) is not seeking proposals at this time and will not accept unsolicited proposals. Respondents are advised that the Government will not pay for any information, bid preparation costs, or administrative expenses incurred in responding to this notice. Acquisition Attribute Program Baseline Details Notice ID / Solicitation Number SSC-GCS-MSS-SSN-2026 Sponsoring Agency / Office United States Space Force (USSF) / Space Systems Command (SSC) / MD31 Product Service Code (PSC) 1677 (Space Vehicle Remote Control Systems) North American Industry Classification (NAICS) 541715 (Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)) Classification & Security Controlled Unclassified Information (CUI) / SECRET Facility Clearance Required Response Date & Time 8 December 2026 at 3:00 PM MST Primary Points of Contact Mr. Daniel Hilger, Procuring Contracting Officer (PCO) Mr. Carl Griffin, Civil Navigation (CNAV) Project Lead Section 2: System Background & Scope of Work 2.1 Background The USSF is actively modernizing the GPS Ground Control Segment (GCS) to deliver enhanced Positioning, Navigation, and Timing (PNT) resilience and operationalize modernized civil and military signals. As part of this effort, USSF seeks to address necessary sustainment and modernization of its global PNT ground receiver network. The legacy ground control segment, the Architecture Evolution Plan (AEP), receives real-time tracking data from a total of 17 global monitor stations, 11 of which are estimated to face obsolescence in late 2028. USSF seeks options to transition to a modernized, sustainable ground segment architecture to maintain AEP's clock and orbit estimation engine (the Kalman Filter). To that end, the Government is requesting interested respondents submit statements of capability (SOCs) describing potential solutions to provide the capabilities described herein. Furthermore, the Space Force requires that any replacement ground receiver infrastructure not merely duplicate legacy capabilities but simultaneously address broader enterprise needs. The replacement architecture must serve as the primary operational enabler for: Civil Navigation (CNAV) Modernization: Providing independent, continuous signal-in-space tracking, integrity monitoring, and safety-of-life assurance for advanced civilian signals (L2C, L5, L1C) to support joint Federal Aviation Administration (FAA) and international civil aviation commitments. Military Navigation (MNAV) & M-Code Operations: Integrating secure, high-fidelity tracking of military M-Code signals to enable robust anti-jam, anti-spoof Navigation Warfare (NAVWAR) operations and Regional Military Protection (RMP). 2.2 Spectrum & Signal Tracking Requirements To demonstrate that the required monitoring capability extends beyond legacy single-frequency L-Band observables, the proposed Monitor Station Service (MSS) must provide simultaneous multi-frequency, multi-code tracking across a growing constellation (up to 63 Space Vehicles). The solution must provide continuous tracking, measurement extraction, and observable processing across the following specific signal tiers: Signal Tier Frequency / Signal Type Capabilities & Processing Requirements Legacy Signals (Baseline Parity) L1 (1575.42 MHz): L1P-codeless L1 C/A, L1P(Y) L2 (1227.60 MHz): L2P(Y) L2P-codless Continuous tracking, legacy LNAV message demodulation, pseudorange/carrier-phase measurement extraction, and legacy telemetry processing for core AEP Kalman Filter orbit/clock estimation continuity. Modernized Civil Signals (CNAV) L5 (1176.45 MHz): Safety-of-Life (SoL), L5I,L5Q L2 (1227.46 MHz): L2C (L2CM,L2CL) L1 (1575.42 MHz): L1C (L1CD,L1CP) CNAV message demodulation, multi-frequency ionospheric delay cancellation, advanced signal quality monitoring (SQM), interference/jamming detection, and civil aviation safety-of-life (SoL) processing standards to support L5 Initial Operational Capability (IOC). Military Signals (Modernized) L1 / L2 M-Code (1575.42 MHz / 1227.46 MHz): Earth Coverage & Regional Military Protection (RMP) Direct M-Code acquisition and tracking, cryptographic channel decoding via NSA-certified security architecture, advanced anti-jam / anti-spoof protections, and Modernized User Equipment (MGUE) warfighter operational support. 2.3 Core Capabilities & Scope of Work The scope of this market research centers on identifying industry capabilities and realistic timelines to deliver an integrated, secure, and safety-certified Monitor Station Service (MSS) that interfaces seamlessly with AEP and external mission partners (FAA, NGA). The Government intends to acquire and take delivery of the software baseline and associated technical data rights to ensure long-term organic C2 baseline control and sustainment within the Government boundary. The Government is seeking responses that demonstrate capability across the following core technical tasks: Integrated Multi-Signal Ingestion: Acquire, process, format, and distribute raw binary and smoothed pseudorange, carrier phase, Accumulated Delta Range (ADR), and Signal Quality Metrics (SQM) across all legacy, CNAV, and MNAV signals listed in Section 2.2. Modular API & Service-Oriented In

## Sources

- View on SAM.gov: https://sam.gov/opp/6bb4cb10b49644faa217029ff36b6a3d/view
- Data as of 2026-11-14. Source: https://sam.gov/data-services/Contract%20Opportunities/datagov

## Cite this

"GPS Ground Segment Monitor Station Service (MSS), SAM.gov contract opportunity 6bb4cb10b49644faa217029ff36b6a3d." samgovapi.io, https://samgovapi.io/opportunity/6bb4cb10b49644faa217029ff36b6a3d, data as of 2026-11-14. Primary record: https://sam.gov/opp/6bb4cb10b49644faa217029ff36b6a3d/view

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