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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Gian-Paolo,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks for your quick response. I’m looking forward to responses
from other agencies including ESA as well. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Regarding the NASA Electra’s implementation with the LDPC
upgrade, one can turn the LDPC functionality off, without effecting any of the
standard Prox-1 functionality.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Greg<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
Gian.Paolo.Calzolari@esa.int [mailto:Gian.Paolo.Calzolari@esa.int] <br>
<b>Sent:</b> Thursday, February 18, 2010 7:46 AM<br>
<b>To:</b> SLS Channel Coding Working Groups; Kazz, Greg J (313B)<br>
<b>Cc:</b> sls-ngu@mailman.ccsds.org; sls-slp@mailman.ccsds.org<br>
<b>Subject:</b> [SLS-CC] [Sls-slp] Making LDPC coding a work item in the
C&S WG<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Greg,</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
your soliciting is justified and I want to confirm you that the
matter is being discussed in ESA. I hope the same applies to other Agencies
represented in the C&S WG.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Unfortunately I
cannot give you a consolidated position yet.</span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I can however
give you a couple of preliminary comments on the input paper.</span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>In the
following sentence there is a mistake:</span> <br>
<br>
<span style='font-family:"Calibri","sans-serif"'> </span><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Several NASA
Programs i.e., Program Constellation and the Mars Program are requiring the use
of LDPC codes for their Proximity Links: </span><br>
<span style='font-size:10.0pt;font-family:Wingdings'>l</span><span
style='font-size:10.0pt;font-family:Wingdings'> </span><span style='font-size:
10.0pt;font-family:"Calibri","sans-serif"'>Constellation rendezvous links
(e.g., Orion-ISS) </span><br>
<span style='font-size:10.0pt;font-family:Wingdings'>l</span><span
style='font-size:10.0pt;font-family:Wingdings'> </span><span style='font-size:
10.0pt;font-family:"Calibri","sans-serif"'>MSL to MRO link at Mars (2011) </span><br>
<span style='font-size:10.0pt;font-family:Wingdings'>l</span><span
style='font-size:10.0pt;font-family:Wingdings'> </span><span style='font-size:
10.0pt;font-family:"Calibri","sans-serif"'>LDCM (Landsat Data Continuity
Mission, 2013) </span><br>
<span style='font-size:10.0pt;font-family:Wingdings'>l</span><span
style='font-size:10.0pt;font-family:Wingdings'> </span><span style='font-size:
10.0pt;font-family:"Calibri","sans-serif"'>GOES (Geostationary Operational
Environmental Satellite, 2015) </span><br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Obviously,
LDCM and GOES do not have proximity links. The LDPC codes have been
selected for their 'normal' EESS (Earth Exploration Satellite Service) data
downlink to Earth.</span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The White Paper
mentions MSL Electra for LDPCC addition, but it would be very interesting to
know which kind of backward compatibility is included in Electra upgrade
with LDPCC.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I am sure that
this information will be very valuable for those missions that will stick to
the former Proxi-1 coding for missions flying or under (frozen) development.</span>
<br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Best regards</span>
<br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Gian Paolo</span>
<br>
<br>
<br>
<o:p></o:p></p>
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<p class=MsoNormal><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"Kazz,
Greg J (313B)" <greg.j.kazz@jpl.nasa.gov></span></b><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'> </span><br>
<span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>Sent by:
sls-slp-bounces@mailman.ccsds.org</span> <o:p></o:p></p>
<p><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>17-02-2010
23:41</span> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"Gian.Paolo.Calzolari@esa.int"
<Gian.Paolo.Calzolari@esa.int>, "sls-cs@mailman.ccsds.org"
<sls-cs@mailman.ccsds.org>, "sls-ngu@mailman.ccsds.org"
<sls-ngu@mailman.ccsds.org>, "sls-slp@mailman.ccsds.org"
<sls-slp@mailman.ccsds.org></span> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>[Sls-slp]
Making LDPC coding a work item in the C&S WG</span><o:p></o:p></p>
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<span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Gian-Paolo,</span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> </span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>I would like
to request that LDPC coding applied over the Proximity link be made into a Work
Item for study in the CCSDS C&S WG and to be included into the agenda for
the Spring 2010 meeting.</span> <br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>NASA has
submitted it’s white paper on LDPC coding over the Proximity link as proposed
at the Fall CCSDS meeting at ESTEC and I believe since a month has passed all
agencies now have had time to consider the issues explored in the paper. Given
the enhanced focus on cooperation between ESA and NASA in the Mars Enterprise
for 2016 and 2018 and beyond and the potential benefits LDPC coding provides to
these missions, I believe it is prudent for the C&S WG to take on this
topic as a new work item. I also believe other agencies besides NASA and
potentially ESA are interested in having CCSDS pursue this as a work item as
well. </span><br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> </span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Best regards,</span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> </span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Greg</span><tt><span
style='font-size:10.0pt'>_______________________________________________</span></tt><span
style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt>Sls-slp mailing list</tt><br>
<tt>Sls-slp@mailman.ccsds.org</tt><br>
<tt>http://mailman.ccsds.org/mailman/listinfo/sls-slp</tt></span><o:p></o:p></p>
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