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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-fareast-language:EN-US">Dear Greg,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-fareast-language:EN-US">Thank you for the very clear explanation, and yes, I agree on the backward compatibility being covered in 211.1-B-4.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-fareast-language:EN-US">Regards,
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-fareast-language:EN-US">Gabriele.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-ligatures:none;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt;font-family:"Brush Script MT";color:#002060;mso-ligatures:none;mso-fareast-language:FR">Gabriele Donà, Ph.D.</span><span style="color:#1F497D;mso-ligatures:none;mso-fareast-language:FR"><br>
</span><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Thales Specialist<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Head of Data Systems & Communication Department</span><span style="color:#1F497D;mso-ligatures:none;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-ligatures:none;mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Phone:
</span><span style="color:black;mso-ligatures:none;mso-fareast-language:FR">+39 011 7180 555<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Mobile:
</span><span style="color:black;mso-ligatures:none;mso-fareast-language:FR">+39 380 591 6240<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Personal Meeting Room:
</span></b><span style="color:black;mso-ligatures:none;mso-fareast-language:FR">3080044019<b><o:p></o:p></b></span></p>
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</span><span style="color:#1F497D;mso-ligatures:none;mso-fareast-language:FR"><a href="https://join3.thalesgroup.com/"><span style="color:blue">https://join3.thalesgroup.com/</span></a></span><span style="color:black;mso-ligatures:none;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Participant PIN:
</span><span style="color:black;mso-ligatures:none;mso-fareast-language:FR">988 455<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-ligatures:none">From:</span></b><span lang="EN-US" style="mso-ligatures:none"> Kazz, Greg (US 312B) <greg.j.kazz@jpl.nasa.gov>
<br>
<b>Sent:</b> 16 November 2023 21:58<br>
<b>To:</b> DONA' Gabriele <gabriele.dona@thalesaleniaspace.com>; Kazz, Greg via SLS-SLP (US 312B) <sls-slp@mailman.ccsds.org>; Shames, Peter M (US 312B) <peter.m.shames@jpl.nasa.gov>; Moury Gilles <Gilles.Moury@cnes.fr>; Ignacio Aguilar Sanchez <Ignacio.Aguilar.Sanchez@esa.int>;
Lee, Dennis K (US 332G) <dennis.k.lee@jpl.nasa.gov>; Andrews, Kenneth S (US 332B) <kenneth.s.andrews@jpl.nasa.gov>; Andrea Modenini <Andrea.Modenini@esa.int>; sls-rfm@mailman.ccsds.org; Space Link Coding & Synchronization Working Group <sls-cc@mailman.ccsds.org><br>
<b>Cc:</b> Brice.Dellandrea@esa.int<br>
<b>Subject:</b> Re: [EXTERNAL] RE: Updated Proximity-1 Directives and Default Session Control Parameters for Lunar Operations<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Hi Gabriele,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Nice to meet you, even if it is only via email.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I included the entire SLP WG on this distribution, since the topic is an important one.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The Prox-1 physical layer standard (CCSDS 211.1-B-4) specifies Channel 1 as the hailing channel for UHF at Mars
</span><span lang="EN-US" style="font-family:"Times New Roman",serif">in which Ch 1 is defined as
</span><span lang="EN-US">435.6 MHz forward and 404.4 MHz return.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I realize that the Mars Program deviated from this standard and utilized Channel 0 as their Hailing Channel and their working channel.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So this difference is a de-facto vs de-jure issue.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">CCSDS 211.1-B-4 also says in a NOTE (which is non-normative) that “Enterprise-specific hailing channel frequencies can be defined in the default configuration of the Physical Layer parameters”. Furthermore, in another
follow on NOTE (non-normative) in the same section, it says, “if transceivers are compatibly configured, hailing can occur on an agreed-to channel. The first generation transceivers are fixed frequency and use Channel 0”.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So, I believe the Mars Program backward compatibility issue has been documented in 211.1-B-4. Would you agree ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">From an international cross-support CCSDS standard point of view, what I have documented in this proposed Annex for default session control parameters is correct i.e., The Prox-1 standard (CCSDS 211.1-B-4) specifies Channel
1 as the hailing channel for UHF at Mars at those frequencies above. Also per 211.1-B-4, Ch 0 is defined as the forward 437.1 MHz frequency, and the return frequency 401.585625.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Greg<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black;mso-ligatures:none">From:
</span></b><span style="font-size:12.0pt;color:black;mso-ligatures:none">DONA' Gabriele <<a href="mailto:gabriele.dona@thalesaleniaspace.com">gabriele.dona@thalesaleniaspace.com</a>><br>
<b>Date: </b>Thursday, November 16, 2023 at 1:35 AM<br>
<b>To: </b>"Kazz, Greg (US 312B)" <<a href="mailto:greg.j.kazz@jpl.nasa.gov">greg.j.kazz@jpl.nasa.gov</a>><br>
<b>Cc: </b>"<a href="mailto:Brice.Dellandrea@esa.int">Brice.Dellandrea@esa.int</a>" <<a href="mailto:Brice.Dellandrea@esa.int">Brice.Dellandrea@esa.int</a>><br>
<b>Subject: </b>[EXTERNAL] RE: Updated Proximity-1 Directives and Default Session Control Parameters for Lunar Operations<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-ligatures:none"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Dear Greg,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">I’m not sure whether I should reply to you or to the whole WGs. Anyway here’s my comment about the default parameters used to establish hailing.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">In Section A1.1 UHF BAND HAILING CHANNEL PARAMETERS, I believe the default hailing channel should be Channel 0 and not Channel 1. That is important to keep backward compatibility with existing transceivers.
By the way, there is a typo: Ch 0 (404.4 MHz) should read Ch 1 (404.4 MHz) instead. Then, if the intention is to allow hailing on other channels (e.g. channel 1), on specific cases/missions, then I have no objections.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">I hope this comments helps.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Gabriele.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">P.S. In case you wandered, I am the engineering responsible for the UHF subsystems of the ExoMars missions for Thales Alenia Space.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D;mso-ligatures:none"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:18.0pt;font-family:"Brush Script MT";color:#002060;mso-ligatures:none;mso-fareast-language:FR">Gabriele Donà, Ph.D.</span><span style="color:#1F497D;mso-ligatures:none;mso-fareast-language:FR"><br>
</span><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Thales Specialist<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Head of Data Systems & Communication Department</span><span style="color:#1F497D;mso-ligatures:none;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D;mso-ligatures:none;mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Phone:
</span><span style="color:black;mso-ligatures:none;mso-fareast-language:FR">+39 011 7180 555<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Mobile:
</span><span style="color:black;mso-ligatures:none;mso-fareast-language:FR">+39 380 591 6240<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Personal Meeting Room:
</span></b><span style="color:black;mso-ligatures:none;mso-fareast-language:FR">3080044019<b><o:p></o:p></b></span></p>
<p class="MsoNormal"><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Link:
</span><span style="color:#1F497D;mso-ligatures:none;mso-fareast-language:FR"><a href="https://urldefense.us/v3/__https:/join3.thalesgroup.com/__;!!PvBDto6Hs4WbVuu7!L1wAVo628dCMgtpAAumuBTZAr-X3maH_jE88g_kNyAIz5t8dXwpN9AfIWXmU1LBJ8LslZfBgCPKTxNV-al8m1fXa6YllEl-cROvbRj7H$"><span style="color:blue">https://join3.thalesgroup.com/</span></a></span><span style="color:black;mso-ligatures:none;mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#5ABED3;mso-ligatures:none;mso-fareast-language:FR">Participant PIN:
</span><span style="color:black;mso-ligatures:none;mso-fareast-language:FR">988 455<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-ligatures:none">From:</span></b><span lang="EN-US" style="mso-ligatures:none"> SLS-SLP <<a href="mailto:sls-slp-bounces@mailman.ccsds.org">sls-slp-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>Kazz, Greg (US 312B) via SLS-SLP<br>
<b>Sent:</b> 15 November 2023 23:29<br>
<b>To:</b> Kazz, Greg (US 312B) via SLS-SLP <<a href="mailto:sls-slp@mailman.ccsds.org">sls-slp@mailman.ccsds.org</a>>; Space Link Coding & Synchronization Working Group <<a href="mailto:sls-cc@mailman.ccsds.org">sls-cc@mailman.ccsds.org</a>>;
<a href="mailto:sls-rfm@mailman.ccsds.org">sls-rfm@mailman.ccsds.org</a><br>
<b>Cc:</b> Brice Dellandrea <<a href="mailto:Brice.Dellandrea@esa.int">Brice.Dellandrea@esa.int</a>><br>
<b>Subject:</b> [Sls-slp] Updated Proximity-1 Directives and Default Session Control Parameters for Lunar Operations<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Dear CCSDS SLP, C&S, and RFM WGs,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I took the liberty of updating both the Proximity-1 Directive Set as well as the Default Session Control Parameters for Lunar Operations, based upon the inputs provided at the Fall CCSDS Meeting recently concluded in
The Hague (Joint meeting held on Nov. 10, 2023).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The update to both the Lunar Proximity directives and the default session parameters is in the CWE now under this SLP WG directory:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="https://urldefense.us/v3/__https:/cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=*2Fsls*2Fdocs*2FSLS*2DSLP*2FMeeting*20Materials*2F2023*2FFall*2FPost*20Meeting*20Prox*201*20work&FolderCTID=0x012000439B56FF51847E41B5728F9730D7B55F&View=*7BAE8FB44C*2DE80A*2D42CF*2D8558*2DFB495ABB675F*7D__;JSUlJSUlJSUlJSUlJSUlJSUlJQ!!PvBDto6Hs4WbVuu7!L1wAVo628dCMgtpAAumuBTZAr-X3maH_jE88g_kNyAIz5t8dXwpN9AfIWXmU1LBJ8LslZfBgCPKTxNV-al8m1fXa6YllEl-cRGoUqlwQ$">https://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2Fsls%2Fdocs%2FSLS%2DSLP%2FMeeting%20Materials%2F2023%2FFall%2FPost%20Meeting%20Prox%201%20work&FolderCTID=0x012000439B56FF51847E41B5728F9730D7B55F&View=%7BAE8FB44C%2DE80A%2D42CF%2D8558%2DFB495ABB675F%7D</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">There are still several TBDs remaining to be resolved including the action items taken by the RFM WG (e.g., define specific hailing and working channel frequencies at S-band, etc)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am also interested to know if you have specific values for the new parameter: Mod Index.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Please let me know if you have comments, so that I can incorporate them into these two normative annexes which will reside in the restructured Space Data Link Protocol Session Control Blue Book.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Greg<o:p></o:p></span></p>
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