[SLS-CC] FW: LunaNet/Moonlight Augmented Forward Signal (AFS) Specification - Review by SLS Area

Andrea Modenini Andrea.Modenini at esa.int
Wed Sep 11 14:16:07 UTC 2024 

Dear WG,
Please see email below from SLS AD.

As summary,  there is an on-going review of augment forward signal (AFS) by SLS.
I was wondering if you are available to review the document in attachment with the approach indicated by SLS AD (see email below - "Approach").

Because of my fault in informing the WG straight away (I apologize for that), we are already behind schedule.
However, doc is rather short and SLS was kind enough to do a mapping as provided in the table below.

As consequence, I was wondering if we can try to do a little effort, and provide comments by end of next week, Friday 20th COB.
You can simply put your comments in the PDF file attached, and send it back to me. Then, I will do a consolidation of the inputs and forward to SLS AD.

Regards


[cid:image001.png at 01DB0465.E7DC15D0]


Ph.D. Andrea Modenini
TT&C Communications Systems Engineer
TT&C and PDT Systems & Techniques Section (TEC-EST)
RF Systems Division
European Space Agency, ESTEC
Keplerlaan 1, PO Box 299
NL-2200 AG Noordwijk, The Netherlands
andrea.modenini at esa.int<mailto:andrea.modenini at esa.int> | www.esa.int<http://www.esa.int/>
T +31 6 484 56 527


From: Ignacio Aguilar Sanchez
Sent: Tuesday, June 25, 2024 12:21 PM
To: Lee, Dennis K (US 332G) <dennis.k.lee at jpl.nasa.gov<mailto:dennis.k.lee at jpl.nasa.gov>>; Gunther Sessler <Gunther.Sessler at esa.int<mailto:Gunther.Sessler at esa.int>>; Andrea Modenini <Andrea.Modenini at esa.int<mailto:Andrea.Modenini at esa.int>>; Andrews, Kenneth S (US 332B) <kenneth.s.andrews at jpl.nasa.gov<mailto:kenneth.s.andrews at jpl.nasa.gov>>; Kazz, Greg (US 312B) <greg.j.kazz at jpl.nasa.gov<mailto:greg.j.kazz at jpl.nasa.gov>>; Matt Cosby <matt.cosby at goonhilly.org<mailto:matt.cosby at goonhilly.org>>; Howard.Weiss at parsons.com<mailto:Howard.Weiss at parsons.com>; Wong, Englin (GSFC-5670) <mark.wong at nasa.gov<mailto:mark.wong at nasa.gov>>; Lucana Santos Falcon <Lucana.Santos at ext.esa.int<mailto:Lucana.Santos at ext.esa.int>>; Hamkins, Jon (JPL-3300)[JPL Employee] <jon.hamkins at jpl.nasa.gov<mailto:jon.hamkins at jpl.nasa.gov>>; Clemens Heese <Clemens.Heese at esa.int<mailto:Clemens.Heese at esa.int>>
Cc: Gilles.Moury at cnes.fr<mailto:Gilles.Moury at cnes.fr>; Thomas Gannett (thomas.gannett at tgannett.net<mailto:thomas.gannett at tgannett.net>) <thomas.gannett at tgannett.net<mailto:thomas.gannett at tgannett.net>>
Subject: LunaNet/Moonlight Augmented Forward Signal (AFS) Specification - Review by SLS Area

Dear all,

As an SLS contribution to LunaNet/Moonlight interoperability effort, I would like to invite you and your WGs to contribute to the proposed review above.

Please read carefully what follows underneath and do not hesitate to contact me for any doubt and/or clarification.

Kind regards,

Ignacio


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
Mob.+31641360257
Fax  +31715655418
Email: ignacio.aguilar.sanchez at esa.int<mailto:ignacio.aguilar.sanchez at esa.int>
www.esa.int<http://www.esa.int/>


LunaNet/Moonlight Augmented Forward Signal Specification Review
Background
During the recent Lunar Interoperability Forum (LIF) Panel 1, we had the opportunity to know more about the LunaNet/Moonlight initiatives led by NASA and ESA with the cooperation of JAXA. Related presentations from IOAG, ESA and JAXA have been shared with CCSDS. For convenience, I have placed a copy at a dedicated CWE SLS location (see below).
As a follow-on action coming out of a subsequent meeting with the NASA and ESA Moonlight/LunaNet representatives, I offered to review the Augmented Forward Signal (AFS) specification by the CCSDS Space Link Services (SLS) Area.
The AFS is a one-way broadcast signal radiated by NASA, ESA and JAXA satellites providing interoperable Positioning, Navigation and Timing (PNT) services in cislunar region. A large part of this specification falls within the technical domains of competence of three SLS Working Groups (RFM, C&S and SLP).
The AFS document structure seems to inherit much from well-established Global Navigation Satellite Systems (GNSS) signal specifications (e.g., GPS, GALILEO).
The NASA and ESA versions of the AFS specification differ only on the additional NASA cover pages (4 first pages). The NASA version is the one submitted to review and found on the dedicated CWE SLS folder (2024-06-25 Advanced Forward Signal review - All Documents (ccsds.org)<https://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2Fsls%2Fdocs%2FSLS%20Area%2FCWE%20Private%2F2024-06-25%20Advanced%20Forward%20Signal%20review&FolderCTID=0x012000439B56FF51847E41B5728F9730D7B55F&View=%7BAE8FB44C-E80A-42CF-8558-FB495ABB675F%7D>.
Objectives
The review shall tell us whether the AFS specification can be turned into a CCSDS Blue Book and if the answer is positive, what it would take to do so. Document organization as well as editorial language style shall be two key aspects to be examined.
Approach
The proposed approach is the following:

  *   First, a mapping of the AFS document content detail down to the lowest level (paragraph) towards the SLS WGs is given in a spreadsheet (see dedicated CWE SLS folder).
     *   Note that the RFM, C&S and SLP are the three SLS WGs identified to have a connection with the document content.
     *   The other SLS WGs are welcome to provide feedback if they wish so.
     *   Some content is considered beyond the SLS scope.
  *   The AFS document organization and editorial style shall be examined with respect to a CCSDS Blue Book:
     *   Content differences and gaps shall be identified and discussed, like
        *   Content found which is non-existing in a Blue Book,
        *   Content typical in a Blue Book missing in AFS (e.g., managed parameters).
     *   Content misalignments shall be identified and discussed, like
        *   Editorial language not in CCSDS style
        *   Misplaced content with respect to a Blue Book document organization
  *   The CCSDS A20.0-Y-4 Publications Manual is the reference that shall be used to carry out this examination. Reviewers may consider as well other CCSDS Blue Books that may be somewhat and partially like the AFS document such as the CCSDS 414.1 or 415.1.
     *   For information, the later versions of relevant GNSS-like signal specifications (GPS, GALILEO) are provided in a dedicated sub-folder.
  *   The identified SLS WG Chairs shall collect their respective WG feedback and share it in the proposed CWE SLS folder for this review. They could use the provided spreadsheet and/or an annotated version of the AFS document.
  *   The SLS Area will hold a meeting early September to review and discuss the WGs findings for a first consolidation. The proposed date will be announced later.
  *   A final consolidation will take place during the CCSDS Fall Technical Meetings.

Output
The review shall produce an SLS AFS Review Report with a comment spreadsheet and an annotated version of the AFS, if deemed necessary.

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