Zendir Engine

Zendir Engine is the foundational technology behind Zendir’s suite of space mission tools, enabling mission teams to integrate high-fidelity, systems-specific digital twins into their operations stack and convert real-world data into actionable insights. The Engine connects simulation, mission logic, hardware inputs, and operator interfaces into a single cohesive digital twin environment, allowing teams to rehearse, validate, and automate operations from ConOps through decommissioning (decom). It features a developer-friendly backend architecture built for speed and responsiveness, leveraging real-world data, orbital mechanics, and high-fidelity physics for accurate simulation performance. The Engine supports long-duration continuous runs (tested running for 4 days straight) and can execute hundreds of asynchronous simulations per minute, with an asynchronous runtime tested with 1000+ concurrent assets, supporting full-constellation operational scale. It is designed to be truly scalable and extensible, requiring no ongoing development once built, and includes a drag-and-drop satellite builder that lets mission teams design and validate missions at scale without depending on engineering staff. The platform provides full-system digital twins with subsystem and fault modeling, realtime feedback from configurable environments, end-to-end workflow validation with agentic ops support, an open API, live system integration, C2-compatible interfaces, and realtime high-fidelity telemetry ingestion with actionable analytics. It integrates with existing systems including HitL (Hardware-in-the-Loop), SitL (Software-in-the-Loop), TypeScript SDK, Python SDK, OpenC3, CCSDS, and Unreal Engine. The platform comprises three components: Zendir Studio, for constructing spacecraft mission designs and assembling simulation components into fully testable mission environments; Zendir Editor, which enables operators and engineers to configure missions, visualise system behaviour, and interact with simulations in real time to support rapid iteration and confident decision-making; and Zendir API, a language-agnostic programmatic interface for advanced mission automation, offered alongside a Python SDK for quick integrations. The system has been stress-tested through thousands of tests to ensure the highest degree of accuracy achievable in a digital twin environment. Deployments are flexible and on-demand, tailored to a customer’s existing ops stack.