ISO 17401:2023

Overview

ISO 17401:2023 - Space systems: Spacecraft interface requirements document for launch vehicle services defines the recommended format and content for a spacecraft Interface Requirement Document (IRD) submitted by spacecraft (SC) organizations to launch vehicle (LV) service providers. The IRD lists the major technical inputs a spacecraft agency must provide when applying for launch services: mission definition, mechanical and electrical interfaces, environmental limits (mechanical, thermal, cleanliness, radio‑electrical), test and development programs, and launch‑range facilities and support requirements. ISO 17401:2023 is applicable to commercial launch vehicles and related launch facilities and enables spacecraft contractors to prepare a single, LV‑agnostic IRD. The IRD is the source data LV agencies use to prepare the Interface Control Document (ICD) defined in ISO 15863.

Key topics and technical requirements

ISO 17401:2023 organizes the IRD content into practical technical areas, including:

• Spacecraft mission description: mission objectives, orbit parameters, launch window and pointing/separation criteria.
• Mechanical interfaces: configuration, usable volume, fundamental frequencies, mechanical interface fittings, adapters, access and purge/fluids interfaces.
• Electrical interfaces: umbilical wiring diagrams, connector pin assignments, power supply needs, pyrotechnic and dry‑loop commands, telemetry and separation status signals.
• Radio‑frequency (RF) and electromagnetic compatibility: RF link definitions for ground operations, antenna coordinates, link budgets and baseband characteristics.
• Environment requirements: mechanical vibration, shock, thermal environment, static pressure, contamination/cleanliness, RF/EM environments and monitoring.
• SC development and test programme: mechanical qualification testing and LV/SC compatibility tests.
• Launch range facilities and support: logistics, ground support equipment envelopes, handling, power, gas/fluid lines, cleanrooms, hazardous operations and safety requirements.

Practical applications

• Standardizes the IRD content so spacecraft teams can produce a single, comprehensive interface package usable across multiple LV providers.
• Accelerates LV selection and integration by supplying consistent, complete input data to LV agencies for ICD preparation.
• Reduces integration risk by clarifying mechanical, electrical, RF and environmental requirements early in mission procurement.
• Guides launch‑range planners and test engineers on required facilities, GSE, and safety/cleanroom procedures.

Who should use this standard

• Spacecraft systems engineers and payload integrators preparing an IRD.
• Launch vehicle integration teams and LV contractors consuming IRD inputs.
• Launch‑range operators, test engineers, and procurement teams managing pre‑launch activities and facility readiness.
• Project managers seeking consistent interface control between spacecraft and launch services.

Related standards

• ISO 15863 - Interface control document (ICD) for launch vehicle services (used by LV agencies to convert IRD inputs into ICD requirements).