Aircraft Mission Systems
Aircraft mission systems move at the speed of their interfaces. Polyrhythm builds the software layer between platform hardware, mission applications, displays, telemetry, and test evidence so new capability can be integrated, reviewed, and changed without rediscovering the system.
Mission systems software that survives integration
Aircraft programs rarely slow down because one more application is missing. They slow down when interfaces blur, data paths stay implicit, and every software change becomes a system-level integration event.
Polyrhythm keeps mission systems software under control by making interfaces, data flows, test paths, and delivery controls explicit.
AMS GRA: From the beginning
AMS GRA is not just a standard to cite. It shapes how mission systems software is decomposed, procured, integrated, verified, and changed.
Polyrhythm brings direct AMS GRA authorship and implementation experience to aircraft mission-system programs. That matters when a team needs to translate open-systems intent into software architecture, Minimum Procurable Unit boundaries, delivery pipelines, and reviewable evidence.
This is authorship and implementation, not standards-adjacent familiarity.
Open architecture that reaches integration
Open systems only matter when they reduce integration risk. The useful work is not the acronym list. It is the interface contract, data model, emulator, version boundary, test path, and deployment artifact that lets the next sensor, display, algorithm, processor, or mission application land with less rework.
| Standard | Designation | Application | Status |
|---|---|---|---|
| → AMS GRA | Government Reference Architecture | Mission-system decomposition and Minimum Procurable Unit boundaries | Active |
| → OMS | Open Mission Systems | Vendor-interoperable mission application integration | Active |
| → SOSA | Sensor Open Systems Architecture | Sensor and processing module portability | Active |
| → GRA-aligned | Government Reference Architecture family | Portable, controlled-change mission environments | Active |
Displays, telemetry, and flight-test software
Aircraft mission systems software has to survive contact with the vehicle. Polyrhythm works across multi-function display software, aircraft-specific logic, hardware interfaces, display and compute integration, vehicle integration, and flight-test instrumentation.
The same discipline applies to telemetry and test data. Physical and logical architecture, data flows, component constraints, interface boundaries, custom software requirements, and post-test evidence paths need to be defined before the flight window turns assumptions into schedule risk.
| Standard | Designation | Application | Status |
|---|---|---|---|
| → IRIG 106 Ch. 10 | Digital Recording Standard | Interoperable onboard recording and post-test data extraction | Active |
| → iNET-X | Packetized telemetry payload format | Networked, real-time telemetry transport for flight test | Active |
| → IENA | Packetized FTI payload format | Vendor-interoperable flight test instrumentation payloads | Active |
| → ARINC 429 | Avionics data bus | Onboard avionics bus capture into the recording chain | Active |
| → IEEE 1588v2 PTP | Precision Time Protocol | Network time synchronization across distributed telemetry instruments | Active |
DO-178C-aware engineering
Some aircraft software does not need certification today, but still needs to avoid decisions that make future assurance work unnecessarily expensive.
DO-178C-aware engineering means requirements, architecture, partitioning, traceability, testability, configuration control, and artifact discipline are considered when relevant. It is not a claim that every project is certified. It is not a claim of airworthiness approval. It is a way of writing aircraft software so a future certification path is not made harder by preventable engineering choices.
- 01 Requirements →
- 02 Architecture →
- 03 Partitioning →
- 04 Verification →
- 05 Configuration
Evidence is part of the system
Builds are not enough. Aircraft programs need software behavior that can be shown, repeated, reviewed, and tied back to decisions.
Polyrhythm’s delivery patterns emphasize deployment paths, test vectors, flight-representative hardware when appropriate, collected artifacts, readable reports, and traceability back to systems engineering products. The output is not just code. It is the evidence needed to move through integration with control.
Bring the software seams forward
Bring Polyrhythm in when the mission-system layer needs to become explicit before the lab, vehicle, flight-test event, or architecture review: AMS GRA and OMS alignment, display behavior, telemetry paths, hardware/software boundaries, delivery pipelines, and evidence packages.
The best time to remove integration debt is before the integration event exposes it.
Bring us the question
Tell us the question that has to survive review. We will scope it, name the approach before the first run, and show the work that backs the answer.