Overview
ISO 15396:2007 - “Space data and information transfer systems - Cross support reference model - Space link extension services” - defines a cross‑support reference model that provides a common basis for the coordinated development of CCSDS Recommended Standards for Space Link Extension (SLE) services. Adopted from CCSDS 910.4‑B‑2 (October 2005), this second edition (2007) updates the original (1998) and is intended to maintain consistency and interoperability among CCSDS member Agency standards for extending space‑to‑ground communication services.
Key topics and technical scope
The standard establishes the conceptual and architectural foundation for SLE and covers:
- Cross‑support reference model for SLE services used between agencies and ground systems.
- SLE system environment, data and services, including the role of the Space Mission Data System and ground element interactions.
- SLE architecture model (top‑level, functional and cross‑support views) that guides consistent implementation.
- Specification of SLE services, including abstract service models, transfer and management service ports, and production of transfer services.
- Data structures, definitions and acronyms (annexes for SLE data structures and terminology).
- Cross‑support security considerations and the time span of SLE agreements/packages, addressing operational and contractual aspects of cross‑agency support.
- Document control and revision coordination (ISO/CCSDS liaison; NASA acts as liaison for revisions).
The standard references and aligns with related CCSDS/ISO documents to ensure consistency (see Related Standards).
Practical applications
ISO 15396:2007 is used to:
- Design and specify interoperable ground systems that implement Space Link Extension services for mission data transfer.
- Provide a consistent framework for agencies to develop derived or Agency‑specific standards while maintaining compatibility across partners.
- Support creation of memoranda of agreement (MoAs) and operational arrangements for cross‑support of spacecraft missions.
- Guide system architects on mapping space link data units (SL‑DUs) to SLE service data units and defining service ports and management interfaces.
Who should use this standard
- Space system architects and engineers designing ground segment interfaces.
- Standards developers and technical leads at space agencies and contractors.
- Mission integration teams planning cross‑agency operations and data exchange.
- Procurement and interoperability managers responsible for SLE compliance.
Related standards
- CCSDS 910.4‑B‑2 (Cross Support Reference Model - SLE Services) - adopted as the core reference.
- Other referenced CCSDS documents (some noted as equivalent to ISO standards such as ISO 22645, ISO 22641, ISO 22666, ISO 22642, ISO 22664, ISO 22646) for related protocol and data definitions.
By following ISO 15396:2007, organizations ensure consistent, secure and interoperable implementation of Space Link Extension services across international ground systems and mission partners.
