<br><font size=2 face="sans-serif">Greg,</font>
<br><font size=2 face="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.</font>
<br><font size=2 face="sans-serif">Unfortunately I cannot give you a consolidated
position yet.</font>
<br>
<br><font size=2 face="sans-serif">I can however give you a couple of preliminary
comments on the input paper.</font>
<br>
<br><font size=2 face="sans-serif">In the following sentence there is a
mistake:</font>
<br>
<br><font size=3 face="Calibri"> </font><font size=2 face="Calibri">Several
NASA Programs i.e., Program Constellation and the Mars Program are requiring
the use of LDPC codes for their Proximity Links: </font>
<br><font size=2 face="Wingdings">Ć </font><font size=2 face="Calibri">Constellation
rendezvous links (e.g., Orion-ISS) </font>
<br><font size=2 face="Wingdings">Ć </font><font size=2 face="Calibri">MSL
to MRO link at Mars (2011) </font>
<br><font size=2 face="Wingdings">Ć </font><font size=2 face="Calibri">LDCM
(Landsat Data Continuity Mission, 2013) </font>
<br><font size=2 face="Wingdings">Ć </font><font size=2 face="Calibri">GOES
(Geostationary Operational Environmental Satellite, 2015) </font>
<br>
<br><font size=2 face="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.</font>
<br>
<br><font size=2 face="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.</font>
<br><font size=2 face="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.</font>
<br>
<br><font size=2 face="sans-serif">Best regards</font>
<br>
<br><font size=2 face="sans-serif">Gian Paolo</font>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>"Kazz, Greg J (313B)"
<greg.j.kazz@jpl.nasa.gov></b> </font>
<br><font size=1 face="sans-serif">Sent by: sls-slp-bounces@mailman.ccsds.org</font>
<p><font size=1 face="sans-serif">17-02-2010 23:41</font>
<td width=59%>
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<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="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></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">[Sls-slp] Making LDPC coding a work
item in the C&S WG</font></table>
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<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=2 face="Calibri">Gian-Paolo,</font>
<br><font size=2 face="Calibri"> </font>
<br><font size=2 face="Calibri">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.</font>
<br><font size=2 face="Calibri">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. </font>
<br><font size=2 face="Calibri"> </font>
<br><font size=2 face="Calibri">Best regards,</font>
<br><font size=2 face="Calibri"> </font>
<br><font size=2 face="Calibri">Greg</font><tt><font size=2>_______________________________________________<br>
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</font></tt>
<br>