Projects

Overview
Project Title	Reference Architecture for Space Data Systems (Issue 3)
Approval	Draft
Document Number	CCSDS 311.0-M
Charter	1.01 System Architecture Working Group
Document Type	Magenta
Description of Document	The RASDS provides a set of architecture viewpoint specifications and views suitable for use in describing space data systems. These include: Enterprise, Functional, Connectivity (physical & deployment), Protocol, and Information viewpoints. \n \n This update is proposed to add new viewpoints for: Services (exposed interfaces), Physical (structural, electrical, etc), and Operations (process & procedure). The Services viewpoint has already been created for the SCCS-ARD, but it is not formalized in the RASDS. The other two viewpoints are of importance to CCSDS (TC 20 / SC 13) and also to ISO TC 20 / SC 14 which has adopted the RASDS framework to describe their own work. Further work is planned to adopt the more modern SysML Model Based System Engineering (MBSE) methods and representations in addition to the simpler Powerpoint representations that are presently employed. This will probably be done as a annex, leaving the existing PPT diagrams in place.
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	The work proposed here leverages earlier work in the SEA SAWG and also work done in the CSS CSA WG. It builds upon work done in the SCCS-ARD & ADD. Other reference architectures, such as DoDAF or ToGAF exist, but none covers all of the the same topics as RASDS. Parts of these, such as the DoDAF operations views, will be adopted where useful. \n \n The RASDS work already leverages work done in RM-ODP (a set of ISO specs) and it is also compliant with ISO 42010 and IEEE 1471. The RASDS framework has been adopted by parts of ISO TC 20 / SC 14 and they wish to collaborate with us on this work since they would value the addition of the operations and physical viewpoints for their own work. The proposed SysML extensions leverage work done in the OMG, which now supports viewpoints, and also work done in several NASA tasks that have explored use of SysML in this context. \n
Resources
Book Editor	NASA
Book Editor Resources	8 MM
Prototype 1
Prototype 1 Resources	N/A
Prototype 2
Prototype 2 Resources	N/A
Prototype 3
Prototype 3 Resources
Contribute	CNES, ESA
Monitor Only	INPE
Resource Comments	There are no prototypes needed for a MB. The framework of the document is sound as it is and the characteristics of these other viewpoints is well understood. The major work will be in defining the SysML mapping, but significant experience in this method and application exists already in NASA and elsewhere.

Schedule

Legend for Schedule Milestones = Required for Orange Books = Required for Green Books = Required for Magenta Books = Required for Blue Books Note - Red Books are Draft Blue/Magenta Books Schedule Milestones	Original Completion Date (Date in M/D/YYYY format.)	Comments (Date in M/D/YYYY format.)
Project Approved	11/1/2016
Project Start Date	12/5/2016
Internal WG Review
First Draft Circulated to WG	7/31/2017
First Draft Comments Due	9/4/2017
Second draft circulated to WG	12/4/2017
Second Draft Comments Due	1/15/2018
Final WB Submitted to AD for Further Processing	4/16/2018
External Milestones
Secretariat Document Processing	6/15/2018
First Agency Review	8/17/2018
RID Resolution	10/19/2018
Secretariat Document Processing 2	11/22/2018
Final Agency Review	1/18/2019
RID Resolution	2/28/2019
First Prototype Development
Second Prototype Development
CMC Approval	4/26/2019
Total Time to Complete (in months)	28