[SLS-CC] CS - restart of activities with end of US shutdown

Tue Dec 16 08:18:51 EST 2025

Update to email below: I missed the parallel email of Stefano, in reply to AI_25_09 and AI_25_10.

AI_25_09: for your convenience I reattach here the presentation of Stefano. I see that based on the analysis ADR vs VCM, ADR seems sufficient for Proximity-1 Ka-Band needs.
Please take time to review the analysis, and if will agree with conclusion, next Spring meeting inputs can focus on ADR.

AI_25_10: Stefano/ESA confirmed previous value, reported again for convenience

  *   Doppler frequency range:  ±870 kHz (coherent mode); 435 kHz return non-coherent and 372 kHz forward non-coherent
  *   Doppler frequency rates:
     *   7.2 kHz/s (non-coherent mode),
     *   14.3 kHz/s (coherent mode).
Based on this, Wing/NASA can proceed with the PLL analysis, AI_25_11, with target Spring 2026.

Summary of way forward:

  *   WG to review the RS analysis of previous email done by CNES
  *   WG to review the ADR vs VCM analysis done by ESA
  *   If both are agreed, by Spring meeting,
     *   Jorge/ESA can use CNES analysis as input for the TM GB,
     *   all agencies can consider ADR as baseline for the Ka-Band Prox-1 definition inputs (I expect an iteration of C&S and RFM books)
  *   In parallel, still for Spring meeting:
     *   Wing/NASA can in parallel work on the PLL analysis based on Doppler rates above
     *   Victor/NASA can prepare the an input for proposed edits of 131.0-B for having parallelization of the Convolutional on the two I/Q branches (when using OQPSK)
     *   Nicola/ESA can continue work on TC Green Book

With regards,
Andrea

Ph.D. Andrea Modenini
TT&C Communications Systems Engineer
E2E systems communication Section (TEC-SET)
European Space Agency, ESTEC
Keplerlaan 1, PO Box 299
2201AZ 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: Andrea Modenini <Andrea.Modenini at esa.int>
Sent: 16 December 2025 12:20
To: Andrea Modenini <Andrea.Modenini at esa.int>; sls-cc at mailman.ccsds.org; Stefano Petri <Stefano.Petri at esa.int>; Daniel Pettitt <Daniel.Pettitt at esa.int>; Nicola Maturo <Nicola.Maturo at esa.int>
Subject: RE: CS - restart of activities with end of US shutdown

Dear all,
Thanks for the feedback received for all the points below.

Final version of Fall MoM are finally available at SLS-CS Fall 2025 MoM_iss1r0_final.pdf<https://spacecomm.sharepoint.com/:b:/r/sites/SLS/Shared%20Documents/SLS-CandS/CWE%20Private/Meeting%20Materials/2025/2025.09%20-%20Fall%202025/SLS-CS%20Fall%202025%20MoM_iss1r0_final.pdf?csf=1&web=1&e=wPyPTb>

For the AIs mentioned in previous email, an update:

  *   AI_25_08, input for Ka-Band proximity: we got a single input from NASA. AI is closed, ESA is completing an analysis of ADR vs VCM (AI_25_09)

(please check email thread for the given input)

  *   AI_25_10: Stefano/ESA will come back on this, together with AI_25_09.
  *   AI_25_12: Daniel/ESA confirmed that for LunaNet the GMSK + PN ranging is not a strong requirement, but is understood a generic need of ranging with high-rate telemetry. AI is closed. For the definition of the Ka-Band ranging, Agencies can consider other waveforms in place of GMSK+PN.
  *   AI_25_14: ESA and NASA see no issues in having 2 Hz resolution for Ka-Band lunar links. AI is closed
  *   AI_25_15: ESA sent the picture of the stack for the Session Control Book to SLP WG. AI is closed

In parallel:

  *   AI_25_17: CNES/Herve performed an polynomial analysis for RS for explaining why PN8 is a valid RS. ESA agrees with conclusion, and proposes the WG to review the analysis (see attachment).

Regards,
Andrea

Ph.D. Andrea Modenini
TT&C Communications Systems Engineer
E2E systems communication Section (TEC-SET)
European Space Agency, ESTEC
Keplerlaan 1, PO Box 299
2201AZ 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: SLS-CC <sls-cc-bounces at mailman.ccsds.org<mailto:sls-cc-bounces at mailman.ccsds.org>> On Behalf Of Andrea Modenini via SLS-CC
Sent: 18 November 2025 14:40
To: sls-cc at mailman.ccsds.org<mailto:sls-cc at mailman.ccsds.org>; Stefano Petri <Stefano.Petri at esa.int<mailto:Stefano.Petri at esa.int>>; Daniel Pettitt <Daniel.Pettitt at esa.int<mailto:Daniel.Pettitt at esa.int>>; Nicola Maturo <Nicola.Maturo at esa.int<mailto:Nicola.Maturo at esa.int>>
Subject: Re: [SLS-CC] CS - restart of activities with end of US shutdown

Hi all,
Thanks all for the feedback.

For re-starting activities, I would like to propose the following way forward:
                By December 15th:

-          Fall 2025 MoM (including already comments received so far) to be reviewed

-          All agencies, AI_25_09 to be completed
To provide system scenarios for Lunar missions, to be adopted for the system analysis (see AI_25_09). In particular, to provide:

§  -orbital parameters

§  -EIRP and G/T (relay and user)

§  -min. required data volume per pass (or minimum average data rate)

-          @Stefano Petri<mailto:Stefano.Petri at esa.int>/ESA, to please check completion of action AI_25_10 and inform WG

-          @Daniel Pettitt<mailto:Daniel.Pettitt at esa.int>/ESA to please check completion of action AI_25_12, and inform WG

-          All agencies, to complete AI_25_14
Member agency to check with vendor if they can be frequency agile in Ka-Band Lunar allocation with a resolution of 2 Hz

-          @Nicola Maturo<mailto:Nicola.Maturo at esa.int>/ESA to inform WG about completion AI_25_15 (I understand already completed)

-          All book captains of Pink/Red sheets to populate CWE folder https://tinyurl.com/CS-Draft-Documents as per below (see also what I did for LBDF pink sheets)

[cid:image001.png at 01DC6E94.FB893280]

For the progress meeting on 2nd December, I propose to re-target it as Agency Review RID disposition of 131.0-P (for which RID deadline is 26 November)

Regards,

Andrea

Ph.D. Andrea Modenini
TT&C Communications Systems Engineer
E2E systems communication Section (TEC-SET)
European Space Agency, ESTEC
Keplerlaan 1, PO Box 299
2201AZ 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: SLS-CC <sls-cc-bounces at mailman.ccsds.org<mailto:sls-cc-bounces at mailman.ccsds.org>> On Behalf Of Andrea Modenini via SLS-CC
Sent: 18 November 2025 12:48
To: sls-cc at mailman.ccsds.org<mailto:sls-cc at mailman.ccsds.org>
Subject: [SLS-CC] CS - restart of activities with end of US shutdown

Hi all,
Can NASA folks please let me know if activities can restart, now that US shutdown appears finished?
I will then propose new deadlines accordingly

Regards

Ph.D. Andrea Modenini
TT&C Communications Systems Engineer
E2E systems communication Section (TEC-SET)
European Space Agency, ESTEC
Keplerlaan 1, PO Box 299
2201AZ 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: Andrea Modenini <Andrea.Modenini at esa.int<mailto:Andrea.Modenini at esa.int>>
Sent: 02 October 2025 09:46
To: Andrea Modenini <Andrea.Modenini at esa.int<mailto:Andrea.Modenini at esa.int>>; sls-cc at mailman.ccsds.org<mailto:sls-cc at mailman.ccsds.org>
Subject: RE: Fall 2025 - draft MoM

Hi all,
Due to the US shutdown, AI deadline is postponed to TBD date.
As soon as activities restart, I will fix the new deadline at +15 days.

Same will be for comments to the MoM,

Andrea

Ph.D. Andrea Modenini
TT&C Communications Systems Engineer
E2E systems communication Section (TEC-SET)
European Space Agency, ESTEC
Keplerlaan 1, PO Box 299
2201AZ 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: SLS-CC <sls-cc-bounces at mailman.ccsds.org<mailto:sls-cc-bounces at mailman.ccsds.org>> On Behalf Of Andrea Modenini via SLS-CC
Sent: 01 October 2025 11:41
To: sls-cc at mailman.ccsds.org<mailto:sls-cc at mailman.ccsds.org>
Subject: Re: [SLS-CC] Fall 2025 - draft MoM

Apologies for multiple emails: also please don't forget the upcoming deadline for AI_25_08. This is due by mid October.

To provide system scenarios for Lunar missions, to be adopted for the system analysis (see AI_25_09). In particular, to provide:
-orbital parameters
-EIRP and G/T (relay and user)
-min. required data volume per pass (or minimum average data rate)

Ph.D. Andrea Modenini
TT&C Communications Systems Engineer
E2E systems communication Section (TEC-SET)
European Space Agency, ESTEC
Keplerlaan 1, PO Box 299
2201AZ 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: SLS-CC <sls-cc-bounces at mailman.ccsds.org<mailto:sls-cc-bounces at mailman.ccsds.org>> On Behalf Of Andrea Modenini via SLS-CC
Sent: 01 October 2025 11:21
To: sls-cc at mailman.ccsds.org<mailto:sls-cc at mailman.ccsds.org>
Subject: [SLS-CC] Fall 2025 - draft MoM

... and as separate email thread, the draft MoM of Fall 2025

Please send your comments by Thursday 16th October, COB.
After  that I will issue the final MoM

Regards
Ph.D. Andrea Modenini
TT&C Communications Systems Engineer
E2E systems communication Section (TEC-SET)
European Space Agency, ESTEC
Keplerlaan 1, PO Box 299
2201AZ 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

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