[CESG] [EXTERNAL] Re: SDLS WG resolution to publish 355.0-B-2

Fri Feb 11 15:07:09 UTC 2022

Dear Peter,

Following your approval and the approval of Ignacio, I will forward the document and the resolution to Tom to initiate CMC publication poll.

Regarding the formalization of SA data base parameters, the important point, as you say, is that both ends have an identical understanding of the parameters. In that respect, SDLS extended procedures (355.1-B-1) defines further the SA parameters, although not in a formal way. Syntax and semantics of those SA parameters could be formally specified in a later issue of this standard if CCSDS comes up with a commonly agreed way of doing that.

Best regards,
Gilles

Gilles MOURY
CNES Toulouse
De : Shames, Peter M (US 312B) <peter.m.shames at jpl.nasa.gov>
Envoyé : mercredi 9 février 2022 20:29
À : Ignacio.Aguilar.Sanchez at esa.int; Moury Gilles <Gilles.Moury at cnes.fr>
Cc : CCSDS Secretariat <secretariat at mailman.ccsds.org>; sls-sea-dls at mailman.ccsds.org; Thomas Gannett <thomas.gannett at tgannett.net>; CCSDS Engineering Steering Group - CESG Exec <cesg at mailman.ccsds.org>
Objet : Re: [EXTERNAL] Re: SDLS WG resolution to publish 355.0-B-2

Dear Gilles and Ignacio,

I have reviewed the document and the resolution and I support the resolution to publish.

That said, I will note that this document exhibits a situation in regard the “SA data base”, which shows up in sec 2.3.1.2 and that is related to the Managed Parameters table in sec 6.2.1, that also occurs in other CCSDS documents where we define “managed parameters” and MIBs.  This issue, as Jonathan Wilmot has pointed out before, is that we have a practice of defining these MIBs, and this SA DB, using only abstract data and we tend to also treat them as not really a full fledged part of the standard for interoperability.  While it is true that neither the SA DB, nor the typical MIB, is directly involved in peer-to-peer data exchanges, having an identical understanding of the parameters, their meanings, and values in the entities on both ends of the exchange is essential.

I am not trying to place a requirement, at this point, on this standard.  But I am suggesting that we consider adopting a practice of formalizing the syntax and semantics of these kinds of parameter tables, if only to provide more concrete guidance to the implementors as to what these the data types, fields sizes, and acceptable values are for these key parameters that do, in fact, manage and control interoperability.

As I noted, this is a subject that Jonathan has already brought up before.  I’d like to suggest that we follow up on this topic in an upcoming CESG meeting.

Best regards, Peter

From: "Ignacio.Aguilar.Sanchez at esa.int<mailto:Ignacio.Aguilar.Sanchez at esa.int>" <Ignacio.Aguilar.Sanchez at esa.int<mailto:Ignacio.Aguilar.Sanchez at esa.int>>
Date: Wednesday, February 9, 2022 at 12:29 AM
To: Gilles Moury <Gilles.Moury at cnes.fr<mailto:Gilles.Moury at cnes.fr>>
Cc: Peter Shames <peter.m.shames at jpl.nasa.gov<mailto:peter.m.shames at jpl.nasa.gov>>, CCSDS Secretariat <secretariat at mailman.ccsds.org<mailto:secretariat at mailman.ccsds.org>>, "sls-sea-dls at mailman.ccsds.org<mailto:sls-sea-dls at mailman.ccsds.org>" <sls-sea-dls at mailman.ccsds.org<mailto:sls-sea-dls at mailman.ccsds.org>>, Tom Gannett <thomas.gannett at tgannett.net<mailto:thomas.gannett at tgannett.net>>
Subject: [EXTERNAL] Re: SDLS WG resolution to publish 355.0-B-2

Dear Gilles,

This one was pending on my side.

I have reviewed the document and the resolution.
Just added a correction on the issues for certain referenced Blue Books.

I support its publication.

Kind regards,

Ignacio

[cid:image001.gif at 01D81F5F.6AB683D0]

Ignacio Aguilar Sánchez
Communication Systems Engineer
Electrical Engineering Department

European Space Research and Technology Centre
Keplerlaan 1, PO Box 299, 2200 AG Noordwijk, The Netherlands
Tel. (31) 71 565 5695
Fax (31) 71 565 5418
Email: ignacio.aguilar.sanchez at esa.int<mailto:ignacio.aguilar.sanchez at esa.int>
www.esa.int<https://urldefense.us/v3/__http:/www.esa.int__;!!PvBDto6Hs4WbVuu7!aVhZkpQMXPQDiOzDtxw1uiiJSRMTg0pCVnX1dD7Zt59mC7UarxG1W8QCIUpIND1rpjNMy3cZ$>

From:        "Moury Gilles" <Gilles.Moury at cnes.fr<mailto:Gilles.Moury at cnes.fr>>
To:        "Ignacio Aguilar-Sanchez" <ignacio.aguilar.sanchez at esa.int<mailto:ignacio.aguilar.sanchez at esa.int>>, "Shames, Peter M (US 312B)" <peter.m.shames at jpl.nasa.gov<mailto:peter.m.shames at jpl.nasa.gov>>
Cc:        "sls-sea-dls at mailman.ccsds.org<mailto:sls-sea-dls at mailman.ccsds.org>" <sls-sea-dls at mailman.ccsds.org<mailto:sls-sea-dls at mailman.ccsds.org>>, "Thomas Gannett" <thomas.gannett at tgannett.net<mailto:thomas.gannett at tgannett.net>>, "CCSDS Secretariat" <secretariat at mailman.ccsds.org<mailto:secretariat at mailman.ccsds.org>>
Date:        23/12/2021 16:42
Subject:        SDLS WG resolution to publish 355.0-B-2
________________________________

Dear Ignacio and Peter,

SDLS WG has reached consensus on publication of issue 2 of SDLS Core Protocol Recommendation (355.0-B-2) following successful RIDs disposition of pink sheets agency review. Please find attached:

-          WG publication resolution

-          Draft issue 2 blue book including all RIDs disposition

-          RIDs dispositions files

I wish you a merry Christmas!

Best regards,

Gilles

Gilles MOURY

SDLS WG Chairman

[cid:image003.png at 01D81F5F.6AB683D0]

Gilles MOURY

Senior Adviser On-Board Architecture & Avionics

Architecture, Validation & Integration Department

18 avenue Edouard Belin 31401 Toulouse Cedex 9

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[cid:image009.png at 01D81F5F.6AB683D0] gilles.moury at cnes.fr<mailto:gilles.moury at cnes.fr>

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 [attachment "SLS-SEA-R-2021-12-001(355.0-B-2).v1.0.ppt" deleted by Ignacio Aguilar Sanchez/estec/ESA] [attachment "355x0p11_final_clean with RIDs disposition.doc" deleted by Ignacio Aguilar Sanchez/estec/ESA] [attachment "355x0-P1.1 pink sheets RIDs disposition.zip" deleted by Ignacio Aguilar Sanchez/estec/ESA]

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