<br><font size=2 face="Comic Sans MS">Dear Greg,</font>
<br><font size=2 face="Comic Sans MS"> there
are some "historical" reasons for that TBD that would take long
to write.</font>
<br>
<br><font size=2 face="Comic Sans MS">On the same topic I have subimmeted
a RID ESA-GPC-27 (see below for the CWE location)</font>
<br>
<br><font size=2 face="Comic Sans MS">Therefore the matyter is under WG
discussion and I take the occasion to silicite WG Memebrs to provide their
position with respect to the above mentione RID ESA-GPC-27.</font>
<br>
<br><font size=2 face="Comic Sans MS">Gian Paolo Calzolari</font>
<br><font size=2 face="Comic Sans MS">SLS-C&S WG Chair</font>
<br>
<br><font size=2 face="Comic Sans MS">See the area </font><img src=cid:_1_054BA208054B9FB40048330AC12576C8>
<table width=100%>
<tr valign=top>
<td width=100%><a href=http://cwe.ccsds.org/><font size=3 color=blue face="Comic Sans MS"><u>The
CCSDS Collaborative Work Environment (CWE)</u></font></a><font size=3 face="Comic Sans MS">
> </font><a href=http://cwe.ccsds.org/sls><font size=3 color=blue face="Comic Sans MS"><u>Space
Link Services Area (SLS)</u></font></a><font size=3 face="Comic Sans MS">
> </font><a href="http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?View=%7b16ACDA38%2dFFA3%2d4657%2d8F27%2dB166C23C24A2%7d"><font size=3 color=blue face="Comic Sans MS"><u>Documents</u></font></a><font size=3 face="Comic Sans MS">
> </font><a href="http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2Fsls%2Fdocs%2FSLS%2DCandS&View=%7b16ACDA38%2dFFA3%2d4657%2d8F27%2dB166C23C24A2%7d"><font size=3 color=blue face="Comic Sans MS"><u>SLS-CandS</u></font></a><font size=3 face="Comic Sans MS">
> </font><a href="http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2Fsls%2Fdocs%2FSLS%2DCandS%2FMeeting%20Materials&View=%7b16ACDA38%2dFFA3%2d4657%2d8F27%2dB166C23C24A2%7d"><font size=3 color=blue face="Comic Sans MS"><u>Meeting
Materials</u></font></a><font size=3 face="Comic Sans MS"> > </font><a href="http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2Fsls%2Fdocs%2FSLS%2DCandS%2FMeeting%20Materials%2F2010&View=%7b16ACDA38%2dFFA3%2d4657%2d8F27%2dB166C23C24A2%7d"><font size=3 color=blue face="Comic Sans MS"><u>2010</u></font></a><font size=3 face="Comic Sans MS">
> 201001.WinterMaterial </font></table>
<br>
<br><font size=2 face="Comic Sans MS">at URL http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2fsls%2fdocs%2fSLS-CandS%2fMeeting%20Materials%2f2010%2f201001.WinterMaterial&FolderCTID=&View={16ACDA38-FFA3-4657-8F27-B166C23C24A2}</font>
<br>
<br><tt><font size=2>____________________________________________<br>
<br>
Gian Paolo Calzolari <br>
Systems Engineer, OPS-OT<br>
<br>
European Space Agency ESA/ESOC<br>
Robert Bosch Str. 5<br>
D-64293-Darmstadt<br>
Tel +49-6151-902913 fax +49-6151-902962<br>
http://www.esa.int/esoc Email: Gian.Paolo.Calzolari[at]esa.int
<br>
[replace [at] with @ for the correct e-mail address]<br>
____________________________________________<br>
</font></tt>
<br>
<br>
<br>
<br>
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<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-cc-bounces@mailman.ccsds.org</font>
<p><font size=1 face="sans-serif">11-02-2010 19:25</font>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">"sls-cc@mailman.ccsds.org"
<sls-cc@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>
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<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">[Sls-cc] Maximum Frame size for Turbocodes?</font></table>
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<br>
<br><font size=2 face="Calibri">Dear CCSDS Coding & Sync WG,</font>
<br><font size=2 face="Calibri"> </font>
<br><font size=2 face="Calibri">I just want to confirm that the maximum
allowable transfer frame size is 1115 octets when one uses a Turbo code.
</font>
<br><font size=2 face="Calibri"> </font>
<br><font size=2 face="Calibri">A NASA mission in pre-phase A has approached
me to ask if CCSDS has completed any further studies per the comment in
the current standard below to allow missions to use the 2048 octet
frame size. Have any further studies been carried out or are
planned by CCSDS ?</font>
<br><font size=2 face="Calibri"> </font>
<br><font size=2 face="Calibri">Currently Section 8 of the TM Sync and
Channel Coding (</font><a href=http://public.ccsds.org/publications/archive/131x0b1.pdf target=_blank><font size=2 color=#29375b face="Calibri"><b><u>CCSDS
131.0-B-1</u></b></font></a><font size=2 color=#29375b face="Calibri"><b>
) </b></font><font size=2 face="Calibri">states:</font>
<br><font size=2 face="Calibri"> </font>
<br><font size=3> </font>
<div>
<br><font size=3><b>8.6.2 </b>Performance for only the following information
block lengths (i.e., Transfer Frame lengths) has been validated by CCSDS
and approved for use (values are in octets): </font>
<br><font size=3>a) 223; </font>
<br><font size=3>b) 446; </font>
<br><font size=3>c) 892; </font>
<br><font size=3>d) 1115; </font>
<br><font size=3>e) 2048. </font>
<br><font size=3>NOTE – Interleaver parameters for the length 2048 octets
are under study by the CCSDS. Until finalized, use of this option is not
recommended.</font>
<br><font size=3> </font>
<br><font size=2 face="Calibri"> </font>
<br><font size=2 face="Calibri">Looking over the pink sheets (ccsds 131.0-P-1.1)
I did not see any new information on this section.</font>
<br><font size=2 face="Calibri"> </font>
<br><font size=2 face="Calibri">Thanks and best regards,</font>
<br><font size=2 face="Calibri"> </font>
<br><font size=2 face="Calibri">Greg</font><tt><font size=2>_______________________________________________<br>
Sls-cc mailing list<br>
Sls-cc@mailman.ccsds.org<br>
http://mailman.ccsds.org/mailman/listinfo/sls-cc<br>
</font></tt>
<br></div>