[Sls-slp] Extending AOS Version 2 SCID by two bits - Pink Sheets

[Shames, Peter M (US 312B)]

Thanks Greg.  I concur, in advance, with moving this forward.

I do also wish to point out that we will also need to update the SCIS Assignment Procedures document, CCSDS 320.0-M-7, and also the SANA SCID website.  These should be updated in parallel so that the SCID assignment and SANA changes are ready at the same time as the AOS changes are.

I have not analyzed these in detail, but believe that the changes are relatively minor.  That said, once this entire package is assembled and put in place I think a broad announcement should go out informing all of the CCSDS agencies and affiliated organizations of this change and of this 4X increase in AOS SCID namespace.

Thanks, Peter


From: Kazz, Greg (US 312B) <greg.j.kazz at jpl.nasa.gov>
Date: Monday, August 26, 2024 at 11:23 AM
To: Ignacio.Aguilar.Sanchez at esa.int <Ignacio.Aguilar.Sanchez at esa.int>, Shames, Peter M (US 312B) <peter.m.shames at jpl.nasa.gov>, Lux, Jim (US 3370) <james.p.lux at jpl.nasa.gov>, Kazz, Greg (US 312B) via SLS-SLP <sls-slp at mailman.ccsds.org>, Thomas Gannett <thomas.gannett at tgannett.net>
Subject: Extending AOS Version 2 SCID by two bits - Pink Sheets
Dear Ignacio and SLP WG,

Attached are the pink sheets to extend the AOS Version 2 Spacecraft ID (SCID) from the current 8 to 10 bits.
This extension is critical, since SANA has informed us all that there are no more Version 2 SCIDs available for assignment for new missions.
Recall that the SLP WG conducted a telecon on this subject a few months ago. The result of that telecon was to see if there was some hope to recycle some of the existing V2 SCIDs if analysis could demonstrate that possibility. Since then, both NASA and UKSA came to the same conclusion that there are too many collisions to share those SCIDs. Therefore, the conclusion the SLP WG agreed to several months ago was to proceed with the SCID extension via pink sheets.

The secretariat has responded very timely and produced the attached pink sheets based upon the SLP WG input. All the other pending changes to the AOS SDLP (732.0) have already been captured before (e.g., FHEC field). So we haven’t lost any updated information in the document. However, the secretariat has informed me that the SLP WG and Ignacio will need to agree to move these pink sheets forward before the end of this week so that this SCID extension change can be included in the Agency Review that will be requested as a consequence of our Fall 2024 CCSDS meeting in London.

Therefore, I am asking both Ignacio and the SLP WG to review the attached pink sheets and to let me and the CCSDS Secretariat  know if you find any issues with them. If none are received, then we should go forward in putting these pink sheets into the Agency Review package for this AOS Space Data Link Protocol.

Best regards,
Greg
SLP WG Chair
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