ISO 18444-2016 PDF

Full title and description

ISO 18444:2016 — Space data and information transfer systems — Space link extension — Application program interface for return operational control fields service. This International Standard specifies the API-level extensions required to support the Return Operational Control Fields (ROCF) service as part of the Space Link Extension (SLE) family of interfaces for space data and information transfer systems.

Abstract

ISO 18444:2016 defines ROCF-specific functionality and interfaces for API components and describes the externally visible behaviour of those interfaces. It is limited to interface and behaviour specifications for implementations supporting the Return Operational Control Fields service and does not prescribe internal component design, particular implementations or the communication technology to be used.

General information

• Status: Published
• Publication date: November 2016 (Edition 2; publication milestone recorded 3 November 2016)
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 49.140 (Space systems and operations)
• Edition / version: 2 (2016)
• Number of pages: 73

Key bibliographic and lifecycle details (status, edition, ICS and page count) are confirmed in the ISO record for this standard.

Scope

Specifies extensions to the SLE (Space Link Extension) API necessary to support the Return Operational Control Fields (ROCF) service. The standard specifies the functionality, the externally visible interface behaviour and the interfaces that API components must provide for ROCF; it explicitly does not mandate internal component designs, specific product implementations or communications technologies. The standard is intended to be used in conjunction with other SLE and CCSDS/ISO references that define the broader SLE framework.

Key topics and requirements

• Definition of ROCF-specific API functionality required from SLE components.
• Specification of ROCF-specific interfaces and operations exported by API components.
• Externally visible behaviour (state machines, error handling and expected responses) for ROCF interfaces.
• Requirements for interoperability of implementations that support the ROCF service within the SLE family.
• Clear statement of exclusions: the standard does not define internal component architecture, implementation technologies or communication transport specifics.

Typical use and users

Used by space agencies, mission operations centres, ground-segment system integrators, spacecraft and ground-station software developers, and vendors implementing SLE-compliant services. Typical use cases include the design, implementation and testing of SLE ROCF services in ground-segment software and in mission-control interfaces that handle return operational control fields.

Related standards

Part of the Space Link Extension (SLE) family and maintained under ISO/TC 20/SC 13 (Space data and information transfer systems). It supersedes the earlier ISO 18444:2013 edition and is intended to be used alongside other SLE and CCSDS specifications that define the overall SLE architecture and related services.

Keywords

Space Link Extension, SLE, ROCF, Return Operational Control Fields, API, space data transfer, ground segment, spacecraft operations, interoperability, ISO 18444.

FAQ

Q: What is this standard?

A: An ISO International Standard that defines API-level extensions to support the Return Operational Control Fields (ROCF) service within the Space Link Extension (SLE) framework for space data and information transfer systems.

Q: What does it cover?

A: It covers ROCF-specific API functionality, the interfaces provided by API components, and the externally visible behaviour expected from those interfaces; it does not cover implementation details, internal design or communication transport technologies.

Q: Who typically uses it?

A: Space agencies, ground-segment developers, mission operations teams, system integrators and vendors implementing SLE services and related ground-station or mission-control software.

Q: Is it current or superseded?

A: The 2016 (second) edition is published and was reviewed and confirmed in ISO's systematic review process (confirmation recorded in 2023). It supersedes the 2013 edition.

Q: Is it part of a series?

A: Yes — it is one part of the SLE (Space Link Extension) family of interface specifications maintained under ISO/TC 20/SC 13 and is intended to be used with other CCSDS/ISO documents that define SLE services and the overall space data transfer architecture.

Q: What are the key keywords?

A: ROCF, SLE, Space Link Extension, API, return operational control fields, space data and information transfer systems, interoperability.