Project Title

Navigation Data Messages XML Specification V.4



Document Number



2.02 Navigation Working Group

Document Type


Description of Document

This document specifies a standard for use in exchanging spacecraft navigation data between space agencies using XML representations of the data messages developed by the CCSDS Navigation Working Group. The rationale for this particular update is to maintain currency with the ODM and ADM document updates.

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

There is no other standard that presents the CCSDS Navigation WG standards in XML format other than the present CCSDS document 505.0-B-n.


Book Editor


Book Editor Resources

The elapsed time for developing this document should be very short. The basic requirement is to remove the current content related to the Attitude Data Messages (ADM) given that the XML formatting information will be provided in the ADM V.2. The ADM has been through Agency Review, and most of the schema work has already been done.

Prototype 1


Prototype 1 Resources

Testing of the schemas and messages will be ongoing with the document development. The final test will take less than a week of elapsed time. Total FTE labor is estimated to be less than 1 month.

Prototype 2

Not Required

Prototype 2 Resources

Zero (0) resources necessary for a second prototype. Consistent with the NDM/XML Version 2 and 3 prototyping, only a single prototype implementation is proposed since the schemas on the SANA Registry will be the same for ALL users, and the astrodynamic content of the ADM V.2 will be tested in the prototyping of that Blue Book. Thus only a single prototype for the NDM/XML is sufficient.

Prototype 3

Not Required

Prototype 3 Resources



Monitor Only


Resource Comments

As noted in the comments for the Book Editor above, most of the schema work has already been done. Originally it was planned to have the ADM changes in the NDM/XML V.3 along with the ODM changes, but the ODM developed faster than the ADM. So it was necessary to split the removal of XML formatting for ODM and ADM into 2 separate versions of the NDM/XML Specification.


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 Bullet1/6/2023CMC-P-2022-12-004
Project Start DateOrange BulletGreen BulletMagenta BulletBlue Bullet1/6/2023
Internal WG Review
First Draft Circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet1/13/2023
First Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet1/27/2023
Second draft circulated to WGOrange BulletGreen BulletMagenta BulletBlue Bullet2/3/2023
Second Draft Comments DueOrange BulletGreen BulletMagenta BulletBlue Bullet2/10/2023
Final WB Submitted to AD for Further ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet2/17/2023
External Milestones
Secretariat Document ProcessingOrange BulletGreen BulletMagenta BulletBlue Bullet4/14/2023
First Agency ReviewMagenta BulletBlue Bullet6/16/2023
RID ResolutionMagenta BulletBlue Bullet6/23/2023
Secretariat Document Processing 2Magenta BulletBlue Bullet
Final Agency ReviewMagenta BulletBlue Bullet
RID ResolutionMagenta BulletBlue Bullet
First Prototype DevelopmentBlue Bullet6/30/2023
Second Prototype DevelopmentBlue BulletNot necessary
CMC ApprovalOrange BulletGreen BulletMagenta BulletBlue Bullet7/28/2023
Total Time to Complete
(in months)
Version: 92.0
Created at 12/1/2022 6:50 PM by David Berry
Last modified at 11/9/2023 2:51 PM by David Berry