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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Hi Greg,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Apologies late reply.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">I quickly checked Annex C. Indeed the Annex C goes across the TM and AOS books.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">I believe we can extract the CVCDU RS part (with test vectors) and move it in our TM GB, since really specific to RS testing.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">For the VCDU FHEC, and CRC instead I’d say better that they stay in the AOS GB, since these are specified in the AOS BB, and we can support you in updating the content
with all the existing codes.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><a id="OWAAM639948BE2E5D462BA1A6F6AEBAFBF3D4" href="mailto:kenneth.s.andrews@jpl.nasa.gov"><span style="font-family:"Calibri",sans-serif;text-decoration:none">@Andrews,
Kenneth S (US 332B)</span></a> can you provide your view?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Andrea<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#00A1E0;mso-ligatures:none">Ph.D. Andrea Modenini</span></b><b><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:gray;mso-ligatures:none"><br>
TT&C Communications Systems Engineer</span></b><b><span style="font-size:12.0pt;font-family:"Tms Rmn",serif;mso-ligatures:none"> </span></b><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:gray;mso-ligatures:none"><br>
TT&C and PDT Systems & Techniques Section (TEC-EST)<br>
RF Systems Division<b><br>
European Space Agency, ESTEC</b><br>
Keplerlaan 1, PO Box 299<br>
NL-2200 AG Noordwijk, The Netherlands</span><u><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:blue;mso-ligatures:none"><br>
</span></u><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:gray;mso-ligatures:none"><a href="mailto:andrea.modenini@esa.int"><span style="color:blue">andrea.modenini@esa.int</span></a> |
</span><span style="font-family:"Calibri",sans-serif;mso-ligatures:none"><a href="http://www.esa.int/"><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#8F8F8F">www.esa.int</span></a></span><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:gray;mso-ligatures:none"><br>
T +31 6 484 56 527</span><span style="font-family:"Calibri",sans-serif;mso-ligatures:none">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri",sans-serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Calibri",sans-serif;mso-ligatures:none">From:</span></b><span lang="EN-US" style="font-family:"Calibri",sans-serif;mso-ligatures:none"> Kazz, Greg (US 312B) <greg.j.kazz@jpl.nasa.gov>
<br>
<b>Sent:</b> Wednesday, May 8, 2024 12:34 AM<br>
<b>To:</b> Andrea Modenini <Andrea.Modenini@esa.int>; Andrews, Kenneth S (US 332B) <kenneth.s.andrews@jpl.nasa.gov>; Matt Cosby <matt.cosby@goonhilly.org><br>
<b>Cc:</b> Kazz, Greg (US 312B) via SLS-SLP <sls-slp@mailman.ccsds.org>; C&S WG <sls-cc@mailman.ccsds.org><br>
<b>Subject:</b> Relevance of Annex C in CCSDS 700.0-G-3 (AOS GB)<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" style="font-size:14.0pt">Hi Andrea & Ken,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">Looking over the current AOS GB (1993), there is an Annex C entitled: “Procedures for Verifying CCSDS Encoder Implementations” consisting of:<o:p></o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo3"><span lang="EN-US" style="font-size:14.0pt">CVCDU R-S outer code, the VCDU Header Error Control code, and the Cyclic Redundancy Code (CRC) polynomial used to generate the VCDU Error
Control field.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo3"><span lang="EN-US" style="font-size:14.0pt">A Reed-Solomon outer code is used to generate check symbols that are appended to a VCDU to form a CVCDU….followed by test vectors that one
could use to verify these codes in their implementations.<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">Question – Similar to the tack the SLP WG is taking in reviewing the TC GB (CCSDS 200-G-6), vintage 1987, would it make more sense to extract Annex C from the AOS GB and place that information
into the TM Sync & CC Green Book ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">So far, it appears to me that most if not the remainder of the AOS GB is out of date and not very useful to maintain as a green book anymore.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">Greg<o:p></o:p></span></p>
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