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STANDARD 26900
Second edition
Space data and information transfer
systems — Orbit data messages
Systèmes de transfert des informations et données spatiales —
Messages pour données d'orbites
PROOF/ÉPREUVE
Reference number
ISO 26900:2024(E)
© ISO 2024
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ISO 26900:2024(E)
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© ISO 2024
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© ISO 2024 – All rights reserved
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ISO 26900:2024(E)
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of
(a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
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www.iso.org/iso/foreword.html.
This document was prepared by the Consultative Committee for Space Data Systems (CCSDS) (as CCSDS
502.0-B-3, Apil 2023) and drafted in accordance with its editorial rules. It was assigned to Technical
Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 14, Space systems and operations and
adopted under the “fast-track procedure”.
This second edition cancels and replaces the first edition (ISO 26900:2012), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Changes in the messages:
— The OCM was added to provide better support for ISO Technical Committee 20, Subcommittee 14
objectives (see section 6).
— MESSAGE_ID was added to the OPM, OMM, and OEM to provide better satisfaction of
requirement P10 (identification and annotation of messages).
— EPHEMERIS_TYPE was updated in the OMM to reflect currently used numbering scheme.
— BSTAR and MEAN_MOTION_DDOT fields are paired with BTERM and AGOM parameters to
support the SGP and SGP4 propagators as well as the new SGP4-XP propagator, respectively.
© ISO 2024 – All rights reserved iii
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ISO 26900:2024(E)
— Changes in the document:
— A new CCSDS repository for normative keyword values for navigation messages has
been created at the SANA Registry, accessible on the Internet at:
https://sanaregistry.org/r/navigation_standard_normative_annexes/. (See annex B for details
on the affected keywords and links to the content.)
— Several annexes were added. Some are required by CCSDS rule changes, and some are for the
provision of supplementary material.
— Examples for OPM, OMM, and OEM that formerly appeared in sections 3, 4, and 5, respectively,
have been moved to an informative annex.
— The ‘Checklist ICD’ that was added in ODM Version 2 has been discontinued. T
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