[Sea-sa] Re: SAWG Re-start and the CCSDS Reference Architecture

Shames, Peter M (312B) peter.m.shames at jpl.nasa.gov
Tue Nov 24 17:55:25 UTC 2015

Hi Roger,

Thanks for getting back to me so quickly.  I was told that you would not be available immediately, but was not otherwise informed of how much effort you would be able to supply overall.   It appears that the total effort that you can commit to is substantially less than what is needed.  This is not a surprise and I am not faulting you in any way.  It is just the reality of the situation.

We will need to see just what level of resources Ray is able to bring to the table as the aggregate will determine what we can expect to accomplish.

Let’s see when Ray can be available for a telecon.

Thanks, Peter

From: Roger Thompson <Roger.Thompson at scisys.co.uk<mailto:Roger.Thompson at scisys.co.uk>>
Date: Tuesday, November 24, 2015 at 9:27 AM
To: Peter Shames <peter.m.shames at jpl.nasa.gov<mailto:peter.m.shames at jpl.nasa.gov>>, Ramon Krosley <r.krosley at andropogon.org<mailto:r.krosley at andropogon.org>>
Cc: SEA-SA <sea-sa at mailman.ccsds.org<mailto:sea-sa at mailman.ccsds.org>>
Subject: RE: SAWG Re-start and the CCSDS Reference Architecture

Hi Peter,

I was asked if I could attempt to provide inputs in terms of the MOIMS functions (essentially SM&C), with a view to updating the MOIMS diagram in your presentation to show interactions and information exchanges in the way you had identified for other areas.  I indicated that I may be able to do this, but would not have any time before Christmas due to commitments on other projects.  I was anticipating a few days effort in total prior to the next CCSDS technical meeting.  I cannot commit to provide any more than this, as we are simply not funded to do that.  I have already committed to provide ca. 10% of my available time to work on Mission Planning Green Book, which is effectively the level at which I am funded for CCSDS.  The work you outline below would appear to be significantly more effort than this.

At present I could support a telecon at 16:00 UTC on either 1st or 3rd December.

Best regards,


From: Shames, Peter M (312B) [mailto:peter.m.shames at jpl.nasa.gov]
Sent: 24 November 2015 17:09
To: Ramon Krosley; Roger Thompson
Subject: SAWG Re-start and the CCSDS Reference Architecture
Importance: High

Roger, Ray, et al,

During this month's CCSDS working meetings we discussed the restart of the SEA System Architecture WG, and particularly the immediate task of making progress on the CCSDS Reference Architecture.  The request to do the SAWG re-start has cleared the CESG conditions and has now been submitted for CMC approval.  You can look in the CCSDS CWE for the draft charter (http://cwe.ccsds.org/fm/Lists/Charters/DispForm.aspx?ID=19&Source=http%3A%2F%2Fcwe.ccsds.org%2Ffm%2FLists%2FCharters%2Fsea.aspx&ContentTypeId=0x0100A4D5CA281E0BF448B809E87B9A2111F6) and for the three draft projects that we have agreed are to be started.  The Concept Paper for this work is atached here.

As agreed during the CESG meeting, the three projects to be started, in priority order, are:

  1.  CCSDS Reference Architecture
  2.  SANA Registries and policies
  3.  RASDS re-confirmation
The following comments reflect what has been proposed and discussed.  However, I do consider the work plan and the priorities to be open for discussion, so if any of you have issues please bring them up now.    Item 2 on this list is already well under way, having been worked with the SANA Operator and the CCSDS Secretariat staff, including the CCSDS Chief Tech Writer.  I will load the current drafts into a folder on the CWE.  Item 3 on the list should be a quick piece of work, since what we have agreed to do is just to re-confirm the current RASDS, CCSDS 311-M-1, until we have freed the resources to do the more extensive job in the second phase of this work.  Item 1 is the one that has some sense of urgency from the CMC and that will take significant effort.

Attached are the materials used during the CCSDS Reference Architecture special session held on Tuesday, 10 Nov.  These concepts, and the figures that represent them, are drawn almost exclusively from existing MOIMS SM&C and SOIS documents.  Charts 22-24 describe the open issues and overall approach.  I will not repreat all of that here except to note that I think the first thing we need to do, after we agree on the details of the approach, is to tackle these two issues from pg 22:

  *   MOIMS functions, their interactions, and information exchanges (internal & external) must be factored into the Reference Architecture
  *   SOIS functions, their interactions, and information exchanges (internal & external) must be factored into the Reference Architecture
The present materials, at least the ones I could find, just do not have the level of clarity and consistency that we need, and they do not align with each other nor with the SCCS-ADD, so work must be done to sort this out and to get us on a level playing field.  Only after we do that can we start to discuss where the gaps are, even on a conceptual level.

In order to be able to make any sort of plan for this we need to know just what we are each bringing to the table in terms of resources.   I will be able to make roughly 25% of my time available to work on this for the next six months.  I do have other commitments, so my level of effort may vary over time depending on other project priorities.  Working together I think we can make significant progress in that space of time.

I would like to know just what level of effort each of you will be able to provide and if you have any scheduling issues.  Please let me know what your level of contribution will look like and the expected period of performance.

I also propose that we have a planning telecon early in Dec.  Either Tuesday 1 Dec or Thursday 3 Dec, at 0800 Pacific work for me.  Do either of these days work for you?

Thanks, Peter


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