[SOIS-WIR] CCSDS SOIS-WIR Fall Meetings Plenary

Thu Sep 8 20:05:44 UTC 2022

Dear Kevin, dear all,

Thank you very much for your E-mail Kevin. As CNES representative of both SOIS/Wireless WG and SFCG/LMSG, I propose to present 3 slides during the SOIS-WIR plenary, about the results of the last SFCG meeting in Australia (july 2022), and in particular the updates regarding wireless for the new SFCG recommandation about lunar frequencies: SFCG REC 32-2R4, which has been approved, with the following lunar Wireless frequency bands, which therefore now apply to our 883 Blue Book.  The good news is that new SFCG lunar wireless band has been added, and one extended:

390-405              MHz
410-420              MHz
435-450              MHz
2.400-2.480        GHz
2.5035 - 2.655   GHz   (instead of 2.5035-2.620 GHz in SFCG REC 32-2R3)
3.5-3.8                GHz
5.15-5.835          GHz
5.855-5.925        GHz
25.25-25.5          GHz
27.225-27.5        GHz

    27.5-28.35          GHz

Another remark also FYI: Some colleagues pushe for a request to extend the SFCG "3GPP 2 GHz" band down to 2.500 GHz instead of 2.5035 GHz, but SFCG REC 32-2R4 has kept the 3.5 MHz guard band between PNT (2483.5-2500 MHz) and Wireless (from 2.5035 GHz up to now 2.655 GHz). Now, CNES computations clearly demonstrates that PNT would have harmfull interferences if Wireless would go down to 2.5000 GHz instead of 2.5035 GHz. In between, NASA LUNANET interface specification V3 published on internet mentioned PNT as a baseline in 2483.5-2500 MHz band. Moreover, the ESA baseline for PNT of MOONLIGHT is in 2483.5-2500 MHz too. To be noted in addition: NASA LUNANET V3 is respecting SFCG as shown by the figure bellow extracted from the specification:

[cid:image002.png at 01D8C3CF.21185900]
Also to be noted: there are not any frequencies bellow 2 GHz in the Shielded Zone of the Moon, in the the LUNANET interface specification V3, NASA committing to protect Radio Astronomy in the Shielded Zone of the Moon; same thing for ESA's MOONLIGHT baseline. Pushing downing to 2.5000 GHz, and therefore destabilizing PNT, would have actually as one of the consequences a re-highlighting of the multilevel debate related to protection of RA in the SZM.

To avoid all this, CNES kindly encourage the teams pushing for a 2.5000 GHz wireless limit instead of 2.5035 GHz to study a pragmatic lunar 3GPP 5G wireless solution in 2.5035-2.6550 GHz, even if one channel (even wide) would be "lost", by optimizing as a maximum the different possible spectral configurations respecting SFCG and selecting accordingly hardware/software vendors. If such a pragmatic solution, taking into account the need for a not interfered PNT,  would be really impossible to be kindly decided, CNES kindly suggest to go directly to the SFCG 3.5-3.8 GHz lunar wireless band (for instance) for operational applications.

May be the Artemis wireless spectrum discussions could be presented also for information of the WIR WG during the WIR plenary ?

Looking forward to "see" you during next remote CCSDS SOIS-WIR meetings; have a nice day

Very best regards

Jean-Luc

De : SOIS-WIR <sois-wir-bounces at mailman.ccsds.org> De la part de Kevin K Gifford via SOIS-WIR
Envoyé : dimanche 4 septembre 2022 22:53
À : sois-wir at mailman.ccsds.org; Martin.Drobczyk at dlr.de; tomiki.atsushi at jaxa.jp
Cc : Millard, Wesley P. (HQ-CG000)[JHU / APL] <wesley.p.millard at nasa.gov>; Lansdowne, Chatwin (JSC-EV811) <chatwin.lansdowne-1 at nasa.gov>; Kevin K Gifford <kevin.gifford at colorado.edu>; Cascarano, Brian (ASC/CSA) <brian.cascarano at canada.ca>; Stephen Braham <stephen_braham at sfu.ca>
Objet : [SOIS-WIR] CCSDS SOIS-WIR Fall Meetings Plenary

Dear SOIS-WIR interested parties -

The SOIS-WIR Working Group will meet remotely the week of 17-Oct-2022 with a plenary on Monday (17-Oct-2022) 0900-1100 MDT.

NASA and CSA will meet to continue 3GPP 5G and lunar spectrum discussions for Artemis.

Please let me know if your agency would like to contribute any content to the SOIS-WIR Plenary.

Thanks!

Kevin
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