Cathedral Celestial - IMA / CDS Development

Cathedral Celestial reduces your CDS certification timeline, eliminates the architecture decisions that cause late-stage failures, and gives your team the domain expertise they would otherwise spend years building.

What Celestial Delivers

Flight & Cabin Software

RTOS and bare-metal embedded software for flight-critical and cabin subsystems, developed under a documented, auditable process.

Bus & Interface Integration

ARINC 429 and ARINC 653 partitioned integration work, including interface control documentation and timing analysis.

Certification Evidence

PSAC, SDP, SVP, and SCMP planning artifacts and structural coverage evidence, structured for DER and certification authority review.

One Mission Across Verticals

A Joby Aviation S4 experimental eVTOL aircraft on the taxiway at Edwards Air Force Base — eVTOL & Advanced Air Mobility

Space Shuttle Columbia launching from Kennedy Space Center on the STS-1 mission — Launch & Orbital Systems

A Gulfstream G650 business jet banking in flight against a clear blue sky — Business & Cabin Avionics

What We Do.

System Architecture

Create reusable display platforms across multiple aircraft

Objective: Platform reuse

HMI & Cockpit Display Design

Deliver usable and competitive cockpit displays

Objective: Customer acceptance

ARINC 661 Display Definition Modeling

Support multiple avionics functions on one display platform

Objective: Modular display architecture

RTOS Integration & Performance

Meet safety-critical avionics timing requirements

Objective: Deterministic real-time performance

HMI Prototyping

Improve cockpit usability before certification

Objective: Customer feedback cycles

BSP & Driver Development

Support different display hardware vendors

Objective: Hardware compatibility

Problems Celestial Solves

Integration with legacy avionics ARINC 429

Integration with multiple avionics subsystems

ARINC 661 widget implementation scope

Implementing display server, user applications, graphics rendering engine

Hard real-time requirements

Multicore certification issues

Our process

Programs typically bring us in for one of two reasons: to develop a subsystem's embedded software directly, or to provide independent verification and certification support alongside an existing internal team. Both start with a systems model — a SysML architecture that ties requirements to design to verification — so DER reviews aren't reconstructing traceability after the fact.

See our MBSE approach

Standards & Frameworks

DO-178C DO-254 DO-330 ARP4754A ARP4761 ARINC 429 ARINC 653 MIL-STD-1553

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