[CESG] [EXTERNAL] 131.3 unresolved Poll: SLS position paper

Fri Apr 3 20:13:30 UTC 2020

Dear Margherita and CESG members,

During yesterday's CESG WebEx I said that I would provide a revision of the original NASA position paper on how to resolve this issue.  That is attached.  It is a refinement of the position that we presented before, and it specifically tries to address the technical issues that Gilles and others have raised.

You will see that this is endorsed by the relevant set of NASA participants in the RFM, C&S, SLP, and Opt WGs.  They all had a role in refining and reviewing these materials.

Lastly, you will find in the backup an analysis showing the difference in outcome between the approach proposed here and what would result from the present trajectory as documented in Gilles note.  We all believe that what was, in effect, implied by the changes to the DBV-S2 standard really represent what should be an architecturally significant shift in how the SLS standards, as a group, may be applied to future missions.

We will be missing a significant opportunity if we do not take the time now to adopt this as a uniform position across all of the affected SLS standards.

While we all must respect the crucial role of the CCSDS Working Groups in developing and validating technically sound standards, we must also remember that the CESG has been assigned the role for ensuring technical quality, coherence, and consistency across the standards and across the areas.

2.3.2.3 CESG Responsibilities

The CESG is specifically responsible for the following:

a)  maintaining and upholding the overall technical quality and consistency of the evolving set of CCSDS Recommended Standards and Practices;
And that required CESG review is the context within which these issues were identified.  This is not just a Working Group issue.

Best regards, Peter

From: CESG <cesg-bounces at mailman.ccsds.org> on behalf of Gilles Moury <Gilles.Moury at cnes.fr>
Date: Saturday, March 28, 2020 at 11:25 AM
To: "Margherita.di.Giulio at esa.int" <Margherita.di.Giulio at esa.int>
Cc: "Massimo.Bertinelli at esa.int" <Massimo.Bertinelli at esa.int>, CCSDS Engineering Steering Group - CESG Exec <cesg at mailman.ccsds.org>
Subject: [EXTERNAL] [CESG] 131.3 unresolved Poll: SLS position paper

Dear Margherita,

I hope you and your family are able to stay safe & healthy.

As a response to action item taken during March 10 CESG telecon, please find attached SLS position paper regarding 131.3 unresolved poll.

Best regards,

Gilles

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Gilles MOURY

Senior Adviser On-Board Architecture & Avionics

Architecture, Validation & Integration Department
18 avenue Edouard Belin 31401 Toulouse Cedex 9

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