Draft documents are subject to change, and the draft CCSDS Recommendation referenced here does not necessarily represent consensus technical agreement among the CCSDS Member Agencies.

The Management Council of the Consultative Committee for Space Data Systems (CCSDS) has authorized the publication, and requests Agency review, of the following document:

This Recommended Standard for Conjunction Data Message (CDM) specifies a standard message format for use in exchanging spacecraft conjunction information between data originators of conjunction assessments, satellite owner/operators, and other authorized parties. Such exchanges are used to inform satellite operator(s) of conjunctions between objects in space to enable consistent warning by different organizations employing diverse conjunction assessment techniques. This draft update adds several enhancements to the original specification. These enhancements are detailed in annex J.

Member and Observer Agencies are requested to send their sets of review comments to the CCSDS Review Coordinator with a copy to the CCSDS Secretariat. Each review comment should be submitted on a separate Review Item Disposition (RID) form. Submission of RIDs in electronic form is preferred. The following ASCII RID forms are available (click on form name to access):

Please contact the Secretariat office at secretariat@mailman.ccsds.org if you have questions.

International review start date: 4/1/2024
International review completion date: 5/31/2024
CCSDS Review Coordinator:
Name: David Berry
E-mail: david.s.berry@jpl.nasa.gov