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Modular Open Architecture Assured Positioning, Navigation, and Timing (PNT) Hub


OUSD (R&E) CRITICAL TECHNOLOGY AREA(S): Advanced Computing and Software


The technology within this topic is restricted under the International Traffic in Arms Regulation (ITAR), 22 CFR Parts 120-130, which controls the export and import of defense-related material and services, including export of sensitive technical data, or the Export Administration Regulation (EAR), 15 CFR Parts 730-774, which controls dual use items. Offerors must disclose any proposed use of foreign nationals (FNs), their country(ies) of origin, the type of visa or work permit possessed, and the statement of work (SOW) tasks intended for accomplishment by the FN(s) in accordance with the Announcement. Offerors are advised foreign nationals proposed to perform on this topic may be restricted due to the technical data under US Export Control Laws.


OBJECTIVE: Develop a modular device that integrates non-GPS sources of position, velocity, attitude, and time to enable operations in GPS-denied environments. The device should align with Modular Open Systems Approach principles and support open architecture technologies (e.g., SOSA, OpenVPX, pntOS, ASPN, etc.)


DESCRIPTION: Assured PNT capability provides continuous access to position, velocity, attitude, and time (PVAT) information of confirmed integrity and of sufficient accuracy to complete the mission in the complete spectrum of GPS threats. Currently, there is no common scalable and reconfigurable solution that delivers continuous access to PVAT information in GPS denied environments. Developing a modular device to integrate non-GPS source PVAT information enables easy reconfiguration to platform specific needs, avoids unnecessary development cost by reusing the same device, and removes intellectual property limitations.


This SBIR topic seeks to leverage commercial off-the-shelf technologies, and government-owned or open interfaces to produce a device with the following capabilities:

1. Platform I/O:

Configurable hardware/software module(s) to interface with aircraft avionics interfaces such as MIL-STD-1553 [Ref 1], ARINC-429 []Ref 2], Ethernet, and so forth.

2. Sensor I/O:

Configurable hardware/software module(s) to interface with non-GPS sources of PVAT.

3. PNT Application Space:

A configurable software hosting environment and software development kit (SDK) using non-proprietary application programming interfaces (APIs) to deploy the following functionality:

* Input / output abstraction:

Conversion of platform/sensor specific data structures to a common application data structure (e.g., ASPN2023.)

* Integrity Module:

Logical or statistical input/output validity test of PVAT and time information. Depending on the non-GPS input modality, this module(s) should conduct fault detection, exclusion, and alerting.

* Sensor Fusion:

Configurable state estimation algorithms to compute GPS- and non-GPS-based navigation solutions (e.g., Extended Kalman Filter, Particle Filter, etc.).

* Logging:

Log of system status, system performance, and alerts for performance evaluation, system maintenance, and troubleshooting.


PHASE I: Develop, design, and demonstrate feasibility of a Functional Architecture design of the proposed approach. Deliver a Physical Architecture design of the proposed approach. For proposed non-GPS PNT sources:

deliver performance prediction via modeling and simulation. The Phase I effort will include prototype plans to be developed under Phase II.


PHASE II: Deliver a working device prototype with necessary operation documentation. Support technology demonstration. Conduct limited-scope environmental qualification tests.


PHASE III DUAL USE APPLICATIONS: Collaborate with other defense agencies and prime contractor to determine transition opportunity. Verify and validate the performance of the technology developed under Phase II to enhance its TRL.


This topic will benefit defense contractors and navigation-based platforms. This technology will align with SOSA principles and allow private sectors to interchangeably and interoperably integrate their technologies without intellectual property limitations.



  1. “MIL-STD-1553C: Military Standard: Aircraft internal time division: Command/response multiplex data bus. (21 September 1978).” Department of Defense, Aeronautical Systems Division.
  2. “ARINC 429 Tutorial.” AIM GmbH, 2024. AIM.


KEYWORDS: SOSA; OpenVPX; pntOS; ASPN; GPS-denied; Kalman filter

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