<span style=" font-size:10pt;font-family:sans-serif">Dear WG members,</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">please find below
the feedback provided by NASA/GSFC for some of the latest AIs.</span>
<br><span style=" font-size:10pt;font-family:sans-serif">For AI-20-08,
deadline is tomorrow so I will still wait one day before closing it.</span>
<br><span style=" font-size:10pt;font-family:sans-serif">AI-20-07 and -09
have a Spring 2021 deadline.</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Best regards,</span>
<br><span style=" font-size:10pt;font-family:sans-serif">Massimo</span>
<br><span style=" font-size:10pt;font-family:sans-serif"><br>
<br>
---------------------------------------------------<br>
Massimo Bertinelli<br>
Communication Systems Engineer<br>
ESA/Estec<br>
<br>
Tel. +31 (0)71 5653435<br>
--------------------------------------------------</span>
<br><span style=" font-size:9pt;color:#800080;font-family:sans-serif">-----
Forwarded by Massimo Bertinelli/estec/ESA on 14/12/2020 10:04 -----</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">"Lee,
Wing-tsz (GSFC-5670)" <wing-tsz.lee-1@nasa.gov></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style=" font-size:9pt;font-family:sans-serif">"Massimo.Bertinelli@esa.int"
<Massimo.Bertinelli@esa.int></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Cc:
</span><span style=" font-size:9pt;font-family:sans-serif">"Fong,
Wai H. (GSFC-5670)" <wai.h.fong@nasa.gov>, "Rodriguez,
Shannon (GSFC-5670)" <shannon.rodriguez-1@nasa.gov>, "Sank,
Victor J. (GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <victor.j.sank@nasa.gov>,
"Huang, Wei-Chung. (GSFC-5670)" <weichung.huang@nasa.gov></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style=" font-size:9pt;font-family:sans-serif">11/12/2020
20:00</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style=" font-size:9pt;font-family:sans-serif">GSFC's
Response to C&S WG Action Items</span>
<br>
<hr noshade>
<br>
<br>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Massimo,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Below
is GSFC’s response to the action items from the last C&S remote working
group meeting:</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"><b>AI-20-07
</b>Considering extending the
simulator channel model work in order to establish procedures for the end-to-end
assessment of coding proposals</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:red;font-family:Calibri">GSFC
agrees</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"><b> </b></span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"><b>AI-20-08</b></span><span style=" font-size:9pt;font-family:Calibri">
</span><span style=" font-size:11pt;font-family:Calibri">Provide
comment on the (ESA) proposal for a channel model for the validation of
(turbo) channel interleavers</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:red;font-family:Calibri">We
currently don’t have any mission that experiences the solar scintillation
phenomenon and therefore do not have any comments on the channel model
at this time.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:red;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"><b>AI-20-09</b></span><span style=" font-size:9pt;font-family:Calibri">
</span><span style=" font-size:11pt;font-family:Calibri">Verify
the (legacy) needs of the ISS in term of coding</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:red;font-family:Calibri">ISS
uses RS+CC but the CC is done on mission unique equipment at the ground
stations. We don't see a need to include the CC as a standard for the future.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:red;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:red;font-family:Calibri">(At
CCSDS ground stations, up link is not a continuous flow of data as the
down link is. At the ground station an idle is continuously transmitted
(CCSDS PLOP-2) until the station receives a command. The idle is
interrupted and the command is inserted in the up link path. ISS
uses RS and convo on up link. Since convo is not a block code or
a data block like the CLTU, the processing must be handled differently
from the normal command methods. The convolutional coding is not
done on the command at the MOC. In the ISS case we are told that
the convo code is applied at the TDRSS ground station. If CCSDS was
to adopt this, it would be a new thing for ground stations.)</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Thank
you,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">GSFC
C&S WG Members (Shannon, Wai, Victor, Wing)</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"></p>
<PRE>This message is intended only for the recipient(s) named above. It may contain proprietary information and/or
protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received
this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect
personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo@esa.int).
</PRE>