ISO 22672-2021 PDF

Full title and description

Space data and information transfer systems — Space link extension (SLE) — Forward space packet service specification. This International Standard defines the Forward Space Packet (FSP) service — a Space Link Extension (SLE) transfer service that enables a mission to send Space Packets to a spacecraft in sequence‑controlled or expedited mode, describing required operations, parameters and behaviours without prescribing implementation technologies or products.

Abstract

This document provides an abstract specification of the FSP service: the operations necessary to provide the transfer service, parameter data associated with each operation, resulting behaviours from operation invocation, and valid operation sequences. It is specific to handling Space Packets (as defined in the referenced CCSDS/ISO material) and addresses online delivery mode; implementation details, communications technologies and scheduling/management practices are outside its scope.

General information

• Status: Published (current International Standard).
• Publication date: 2021-06 (Edition 3, published June 2021).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.140 (Space systems and operations).
• Edition / version: Edition 3 (2021).
• Number of pages: 190 pages.

Data above taken from the ISO bibliographic record and national adoptions of the same ISO document.

Scope

ISO 22672:2021 defines, in an abstract manner, the Forward Space Packet (FSP) service conformant with the Cross Support Reference Model SLE transfer services. The scope covers definition of service operations, operation parameters, operation behaviours and valid sequences for exchanging Space Packets to be transmitted via the telecommand protocol stack. It does not specify concrete product implementations, radio/physical transmission methods, communications technologies, or the management/scheduling processes for the FSP service.

Key topics and requirements

• Definition of FSP service operations (establishing, transferring, confirming and terminating FSP sessions).
• Specification of parameter data items associated with each operation and allowed value representations.
• Behavioral descriptions for each operation, including success/failure conditions and sequencing constraints.
• Support for sequence‑controlled and expedited transfer modes for Space Packets.
• Conformance boundaries: abstract service specification only — excludes implementation details, physical link technologies, and scheduling/management activities.

High-level requirements and service semantics follow the SLE/Cross Support reference framework and CCSDS-related references cited within the standard.

Typical use and users

Typical users include spacecraft systems engineers, mission operations architects, ground-segment developers, spacecraft communications product vendors, systems integrators and organisations involved in cross-support ground-station and mission operations. The standard is used to design, specify and verify SLE interfaces and FSP service implementations for telecommanding and mission data transfer to spacecraft.

Related standards

ISO 22672:2021 is part of an SLE family of standards and work items produced by ISO/TC 20/SC 13 and the CCSDS community. Related standards include ISO 22671 (Forward CLTU service specification), ISO 26143 (Return operational control fields service specification) and other SLE/cross‑support transfer service documents and the CCSDS Recommended Standards referenced within ISO 22672. National adoptions (e.g., BS ISO 22672:2021) and space‑industry technical standards databases list these associated specifications.

Keywords

Forward Space Packet (FSP), Space Link Extension (SLE), Space Packets, telecommand, space data transfer, CCSDS, mission operations, ground segment, interface specification, FSP service.

FAQ

Q: What is this standard?

A: ISO 22672:2021 is an International Standard that specifies the Forward Space Packet (FSP) service within the Space Link Extension (SLE) framework — an abstract service specification for transferring space packets from ground to spacecraft.

Q: What does it cover?

A: It covers the FSP service operations, the parameters associated with each operation, the expected behaviours and valid operation sequences for sequence‑controlled and expedited packet transfer. It explicitly does not cover concrete implementations, radio/physical transmission methods or operational scheduling procedures.

Q: Who typically uses it?

A: Space agencies, ground-segment and spacecraft communications engineers, vendors of SLE-compatible products, systems integrators and organisations implementing cross-support operational interfaces use this standard to design and validate FSP-capable systems.

Q: Is it current or superseded?

A: Current — ISO 22672:2021 (Edition 3, published June 2021) supersedes the earlier ISO 22672:2011 edition. Organisations should reference the 2021 edition for up-to-date abstract service definitions.

Q: Is it part of a series?

A: Yes — it is part of the SLE/Cross Support family of standards produced under ISO/TC 20/SC 13 and aligns with CCSDS Recommended Standards; related ISO items and companion SLE specifications form a set intended for interoperable space data transfer services.

Q: What are the key keywords?

A: FSP, SLE, Space Packet, telecommand, space data transfer, CCSDS, interface specification, mission operations.