Project Title

Navigation Composite Message



Document Number



2.02 Navigation Working Group

Document Type


Description of Document

Since the publication of the first NavWG Recommended Standard in 2004 (the Orbit Data Messages V.1), progress in developing international standards for use in space flight dynamics operations has been regular. New areas of standardization emerged every year or two between 2007 and 2024. Yet this progress has been hampered by challenges stemming from the interrelated concepts of inheritance, duplication, and consistency. Attempts to address these challenges have consumed many of the NavWG resources (time and effort) over the years and have led to the notion of a "universal, modular message". The concept of this modular message has been a discussion topic within the NavWG since Fall 2014. Now that several outstanding projects have been published, this modularity concept can be addressed. The "Navigation Composite Message" (NCM) is proposed as a solution to some of the challenges that have been faced by the Working Group over the years.

Applicable Patents

There are no patent issues for this technology that are known by the CCSDS community

Patent Comments


Survey of Similar Standards
Documents or Projects
Undertaken in Other Bodies
and elsewhere in CCSDS

This concept involves a selective composite of features found in several existing CCSDS NavWG standards, each of which has been reasonably widely implemented and for which no similar standards are known.


Book Editor


Book Editor Resources

20 work months

Prototype 1


Prototype 1 Resources

12 work months

Prototype 2


Prototype 2 Resources

12 work months

Prototype 3

Prototype 3 Resources


Monitor Only

Resource Comments

See Concept Paper at https://cwe.ccsds.org/moims/docs/MOIMS-NAV/Draft%20Documents/Concept%20Papers/NCM/navigation-composite-message-concept-paper-changesaccepted-20240522.pdf


Legend for Schedule Milestones
Orange Bullet = Required for Orange Books
Green Bullet = Required for Green Books
Magenta Bullet = Required for Magenta Books
Blue Bullet = Required for Blue Books
Note - Red Books are Draft Blue/Magenta Books

Schedule Milestones
Orange BookGreen BookMagenta BookBlue Book
Original Completion Date
(Date in M/D/YYYY format.)
(Date in M/D/YYYY format.)
Project ApprovedOrange BulletGreen BulletMagenta BulletBlue Bullet6/30/2024
Project Start DateOrange BulletGreen BulletMagenta BulletBlue Bullet8/1/2024
Internal WG Review
First Draft Circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet10/31/2024
First Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet11/30/2024
Second draft circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet1/2/2026
Second Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet2/2/2026
Final WB Submitted to AD for Further ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet2/15/2026
External Milestones
Secretariat Document ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet4/15/2026
First Agency ReviewMagenta BulletBlue Bullet6/15/2026
RID ResolutionMagenta BulletBlue Bullet7/1/2026
Secretariat Document Processing 2Magenta BulletBlue Bullet9/1/2026
Final Agency ReviewMagenta BulletBlue Bullet11/1/2026
RID ResolutionMagenta BulletBlue Bullet12/1/2026
First Prototype DevelopmentBlue Bullet6/30/2027
Second Prototype DevelopmentBlue Bullet6/30/2027
CMC ApprovalOrange BulletGreen BulletMagenta BulletBlue Bullet8/31/2027
Total Time to Complete
(in months)
Version: 99.0
Created at 5/22/2024 7:08 PM by David Berry
Last modified at 6/17/2024 12:33 PM by Brian Oliver