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<p>Thanks, Andrea. I am fine with the proposed additional wording in
the VCM technical corrigendum, especially if it conforms with new
wording in the SCCC and DVB-S2 books. I would have preferred
updating the figure that shows the layers, but I understand that
proposal was not agreed to at the meeting this morning.</p>
<p> ----Jon<br>
</p>
<div class="moz-signature"><strong>Jon Hamkins</strong><br>
Chief Technologist, Communications, Tracking, and Radar Division<br>
<br>
<br>
<strong>JPL</strong> | jpl.nasa.gov</div>
<div class="moz-cite-prefix">On 7/7/2021 9:22 AM, Andrea Modenini
(external) wrote:<br>
</div>
<blockquote type="cite"
cite="mid:8548_1625674964_60E5D4D4_8548_279_1_OFD0CC7F09.2843EE78-ONC125870B.00586A18-C125870B.0059F81F@esa.int">
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charset=windows-1252">
<span style=" font-size:10pt;font-family:sans-serif">Dear all,</span>
<br>
<span style=" font-size:10pt;font-family:sans-serif"> I did not
receive any comment about the VCM BB from the WG.</span>
<br>
<br>
<span style=" font-size:10pt;font-family:sans-serif">However,
considering
the outcome of the DVB-S2 BB review we had today, I have myself
a comment.
</span>
<br>
<span style=" font-size:10pt;font-family:sans-serif">We aligned
the
SCCC and DVB-S2 BBs for having a sentence that states the need
to
consider CCSDS 401 BB.</span>
<br>
<span style=" font-size:10pt;font-family:sans-serif">On the same
line,
I would propose to modify Section 2 as provided below (italic
part highlights
the addition).</span>
<br>
<br>
<span style=" font-size:10pt;font-family:sans-serif">You can find
in
attachment also the word file in tracking-changes mode for your
convenience.</span>
<br>
<br>
<span style=" font-size:10pt;font-family:sans-serif">Please let me
know if there is any objection, or additional point to consider,
<u>no
later than 12th July EOB</u>.</span>
<br>
<span style=" font-size:10pt;font-family:sans-serif">I will
afterward
request an Area Resolution for having the technical corrigendum.</span>
<br>
<br>
<span style=" font-size:10pt;font-family:sans-serif">Kind Regards,</span>
<br>
<span style=" font-size:10pt;font-family:sans-serif">Andrea</span>
<br>
<br>
<br>
<br>
<br>
<span style=" font-size:10pt;font-family:sans-serif">-------------</span>
<div><span style=" font-size:12pt;font-family:Times New Roman">This
Recommended
Standard covers functions in both the Synchronization and
Channel Coding
Sublayer and the Physical Layer<i>, the latter for what
concerns the modulation
schemes. CCSDS 401.0-B [5] covers additional features of the
Physical Layer
like frequency bands, polarizations, etc. that are not
described or referenced
here.</i></span>
<br>
<br>
<br>
<span style=" font-size:8pt;color:#808080;font-family:Verdana"><b>HE
Space Operations for ESA - European Space Agency</b></span>
<br>
<span style=" font-size:8pt;color:#00a1e0;font-family:Verdana"><b>Ph.D.
Andrea Modenini</b></span><span style="
font-size:8pt;color:#808080;font-family:Verdana"><b><br>
Communication Systems & Technologies Engineer</b></span><span
style=" font-size:12pt;font-family:Tms Rmn"><b>
</b></span><span style="
font-size:8pt;color:#808080;font-family:Verdana"><br>
TT&C and PDT Systems & Techniques Section (TEC-EST)<br>
RF Systems Division<b><br>
ESTEC</b><br>
Keplerlaan 1, PO Box 299<br>
NL-2200 AG Noordwijk, The Netherlands</span><span style="
font-size:8pt;color:blue;font-family:Verdana"><u><br>
</u></span><span style="
font-size:8pt;color:#808080;font-family:Verdana"><a class="moz-txt-link-abbreviated" href="mailto:andrea.modenini@esa.int">andrea.modenini@esa.int</a>
| </span><a
href="https://urldefense.us/v3/__http://www.esa.int/__;!!PvBDto6Hs4WbVuu7!av8cZaByxWDZLHhI--ea5KCdB1GbEgqU1p3aRmgCnWaI-c1Va7boHYrX4I3Dqd5X4rFHho4$"
moz-do-not-send="true"><span style="
font-size:8pt;color:#8f8f8f;font-family:Verdana"><u>www.esa.int</u></span></a><span
style=" font-size:8pt;color:#808080;font-family:Verdana"><br>
T +31 71 56 53439</span>
<br>
<br>
<br>
<br>
<span style="
font-size:9pt;color:#5f5f5f;font-family:sans-serif">From:
</span><span style="
font-size:9pt;font-family:sans-serif">Andrea
Modenini/estec/ESA</span>
<br>
<span style="
font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style="
font-size:9pt;font-family:sans-serif">"Space
Link Coding & Synchronization Working Group"
<a class="moz-txt-link-rfc2396E" href="mailto:sls-cc@mailman.ccsds.org"><sls-cc@mailman.ccsds.org></a></span>
<br>
<span style="
font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style="
font-size:9pt;font-family:sans-serif">10-06-21
17:28</span>
<br>
<span style="
font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style="
font-size:9pt;font-family:sans-serif">[SLS-CC]
VCM technical corrigendum wording (AI_21_01)</span>
<br>
<hr noshade="noshade">
<br>
<br>
<span style=" font-size:10pt;font-family:sans-serif">Dear
colleagues,</span>
<br>
<br>
<span style=" font-size:10pt;font-family:sans-serif">please find
enclosed
the proposed changes by Jon to the VCM BB discussed during the
joint C&S/RFM
meeting. Please send your comments before <b>1st July 2021</b>
(if
any) directly to John with CC Enrico and I, and C&S
mailing list.</span>
<br>
<br>
<br>
<span style=" font-size:10pt;font-family:sans-serif">Regards</span>
<br>
<span style=" font-size:10pt;font-family:sans-serif">Andrea</span>
<br>
<br>
<br>
<span style=" font-size:8pt;color:#808080;font-family:Verdana"><b>HE
Space Operations for ESA - European Space Agency</b></span>
<br>
<span style=" font-size:8pt;color:#00a1e0;font-family:Verdana"><b>Ph.D.
Andrea Modenini</b></span><span style="
font-size:8pt;color:#808080;font-family:Verdana"><b><br>
Communication Systems & Technologies Engineer</b></span><span
style=" font-size:12pt;font-family:Tms Rmn"><b>
</b></span><span style="
font-size:8pt;color:#808080;font-family:Verdana"><br>
TT&C and PDT Systems & Techniques Section (TEC-EST)<br>
RF Systems Division<b><br>
ESTEC</b><br>
Keplerlaan 1, PO Box 299<br>
NL-2200 AG Noordwijk, The Netherlands</span><span style="
font-size:8pt;color:blue;font-family:Verdana"><u><br>
</u></span><span style="
font-size:8pt;color:#808080;font-family:Verdana"><a class="moz-txt-link-abbreviated" href="mailto:andrea.modenini@esa.int">andrea.modenini@esa.int</a>
| </span><a
href="https://urldefense.us/v3/__http://www.esa.int/__;!!PvBDto6Hs4WbVuu7!av8cZaByxWDZLHhI--ea5KCdB1GbEgqU1p3aRmgCnWaI-c1Va7boHYrX4I3Dqd5X4rFHho4$"
moz-do-not-send="true"><span style="
font-size:8pt;color:#8f8f8f;font-family:Verdana"><u>www.esa.int</u></span></a><span
style=" font-size:8pt;color:#808080;font-family:Verdana"><br>
T +31 71 56 53439</span>
<br>
<span style="
font-size:9pt;color:#800080;font-family:sans-serif">-----
Forwarded by Andrea Modenini/estec/ESA on 10-06-21 17:25 -----</span>
<br>
<br>
<span style="
font-size:9pt;color:#5f5f5f;font-family:sans-serif">From:
</span><span style="
font-size:9pt;font-family:sans-serif">"Jon
Hamkins" <a class="moz-txt-link-rfc2396E" href="mailto:Jon.Hamkins@jpl.caltech.edu"><Jon.Hamkins@jpl.caltech.edu></a></span>
<br>
<span style="
font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style="
font-size:9pt;font-family:sans-serif">"Andrea
Modenini (external)" <a class="moz-txt-link-rfc2396E" href="mailto:Andrea.Modenini@esa.int"><Andrea.Modenini@esa.int></a>,
<a class="moz-txt-link-rfc2396E" href="mailto:Enrico.Vassallo@esa.int">"Enrico.Vassallo@esa.int"</a>
<a class="moz-txt-link-rfc2396E" href="mailto:Enrico.Vassallo@esa.int"><Enrico.Vassallo@esa.int></a></span>
<br>
<span style="
font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style="
font-size:9pt;font-family:sans-serif">09-06-21
18:48</span>
<br>
<span style="
font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style="
font-size:9pt;font-family:sans-serif">VCM
technical corrigendum wording (AI_21_01)</span>
<br>
<hr noshade="noshade">
<br>
<br>
<br>
<span style=" font-size:12pt">Andrea, Enrico,</span>
<br>
<span style=" font-size:12pt">Attached is a draft VCM technical
corrigendum
in response to AI_21_01 from the C&S WG. I completed this
in consultation
with Ken Andrews and John Pietras.</span>
<br>
<span style=" font-size:12pt">The main changes are in two
places: Section
3.2.3 and Section 3.3.2.3 to 3.3.2.4. In summary, with the new
wording
the randomization is determined by VCM type:</span>
<ul>
<li><span style=" font-size:12pt">Type 1 (SCCC-like) VCM will
randomize
the Transfer Frames as the SCCC standard does, using the
TM randomizer.</span>
</li>
<li><span style=" font-size:12pt">Type 2 (DVB-S2-like) VCM
will randomize
the sliced encoder-inputs as the DVB-S2 standard does,
using the ETSI DVB-S2
baseband scrambler.</span></li>
</ul>
<span style=" font-size:12pt">This will make
the CCSDS VCM standard consistent with the 131.2-B-1 and
131.3-B-1 books
(SCCC and DVB-S2), with respect to randomization.</span>
<br>
<span style=" font-size:12pt">These changes are not related to
randomization
that occurs after encoding. The VCM protocol standard already
applies post-encoding
randomization, at the physical layer.</span>
<br>
<span style=" font-size:12pt">Can you forward this message to
the RFM
and C&S mailing lists along with your guidance on how/when
to respond
with comments? I believe we agreed to resolve this action by
email.</span>
<br>
<span style=" font-size:12pt"> ----Jon</span>
<br>
<span style=" font-size:12pt">-- <b><br>
Jon Hamkins</b><br>
Chief Technologist, Communications, Tracking, and Radar
Division<b><br>
O</b> 818-354-4764 (preferred) | <b>M</b> 626-658-6220
(does
not work at home)<br>
<b><br>
JPL</b> | jpl.nasa.gov [attachment
"2021-05-27-VCM-431.1-technical-corrigendum-post-discussion-v3.doc"
deleted by Andrea Modenini/estec/ESA] </span>
<br>
<br>
<br>
</div>
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