<HTML><BODY><FONT style='white-space:pre-wrap;font-family: Helvetica Neue, Helvetica, Arial, sans-serif;margin: 1em 0;'><p dir="ltr">Dear working group,<br><br>I'm sending the following email today to all the implementers that I know and that are probably not subscribed to this mailing list (DSCAL, Airbus, Thalès, UCM, Udri, Deltatec.be, inaf.it...).<br>Please, feel free to send it to others you may know.<br><br>Kind regards<br><br>Roberto<br><br><br><br><br>Dear implementer of the CCSDS 121.0-B-2 standard (or the CCSDS 123.0-B-1), <br><br><br><br>The Multi and Hyperspectral Data Compression Working Group (SLS-MHDC) falling under the Space Link Services (SLS) Area of the CCSDS, has identified the need to update the Recommended Standard CCSDS-121.0-B-2 “Lossless Data Compression”. <br><br>This update is intended to resolve potential ambiguities in the current version of the standard. <br><br>The principle for the intended changes, is to minimize the potential impact of resolving these ambiguities on existing implementations and related documents. <br><br>Therefore, your collaboration is fundamental in order to obtain a complete survey of the choices done in all the existing implementations. <br><br><br><br>We kindly ask you to answer the following survey about your implementation before May 6, 2019. <br><br>If your implementation is Hardware (or both HW and SW), please follow this link: https://fr.surveymonkey.com/r/MY6XS92<br><br>If your implementation is Software, please follow this link: https://fr.surveymonkey.com/r/TKQGZMZ<br><br><br><br>Thank you very much for your valuable help. <br><br>Kind regards, <br><br><br><br>ESA – European Space Agency <br>Roberto Camarero <br>On-board Payload Data Processing Engineer<br>TEC-EDP / Electrical Engineering Department <br>ESTEC<br>Keplerlaan 1, PO box 299, <br>NL-2200 AG Noordwijk, The Netherlands<br><a href="mailto:roberto.camarero@esa.int">roberto.camarero@esa.int</a> | www.esa.int/TEC/OBDP/<br>T +31 71 56 53508 | F +31 71 56 56791 | Room: Na308 </p><br></FONT><br><br><div class="domino-section" dir="ltr"><div class="domino-section-head"><span class="domino-section-title"><font color="#424282">me --- Re: [Sls-mhdc] MHDCA-1810-5 review CCSDS-121.0-B-3 draft --- </font></span></div><div class="domino-section-body"><br><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr valign="top"><td width="1%" style="width: 96px;"><font size="2" color="#5F5F5F">From:</font></td><td width="100%" style="width: auto;"><font size="2">"Roberto Camarero" <Roberto.Camarero@esa.int></font></td></tr><tr valign="top"><td width="1%" style="width: 96px;"><font size="2" color="#5F5F5F">To:</font></td><td width="100%" style="width: auto;"><font size="2">sls-mhdc@mailman.ccsds.org</font></td></tr><tr valign="top"><td width="1%" style="width: 96px;"><font size="2" color="#5F5F5F">Date:</font></td><td width="100%" style="width: auto;"><font size="2">Thu, Apr 18, 2019 09:38</font></td></tr><tr valign="top"><td width="1%" style="width: 96px;"><font size="2" color="#5F5F5F">Subject:</font></td><td width="100%" style="width: auto;"><font size="2">Re: [Sls-mhdc] MHDCA-1810-5 review CCSDS-121.0-B-3 draft</font></td></tr></table><hr width="100%" size="2" align="left" noshade style="color:#8091A5; "><br></div><font size="2" face="sans-serif">Dear working group,</font><br>
<br>
<font size="2" face="sans-serif">As promised in my previous email, you will find below the link for the survey including the list of questions intended for the implementers of the 121.0-B-2 (this should also include all the 123.0 implementers).</font><br>
<br>
<a href="https://fr.surveymonkey.com/r/TKQGZMZ"><font size="2" face="sans-serif">https://fr.surveymonkey.com/r/TKQGZMZ</font></a><br>
<br>
<br>
<font size="2" face="sans-serif">Please take a look and let me know if you think something is missing or if the questions should be different.</font><br>
<br>
<font size="2" face="sans-serif">I'd like to start spreading the survey beginning of next week so that we can compile all the answers before the spring meeting.</font><br>
<br>
<font size="2" face="sans-serif">Kind regards,</font><br>
<br>
<br>
<font size="2" face="sans-serif">Roberto</font><br>
<p><font size="1" color="#808080" face="sans-serif"><b>ESA – European Space Agency</b></font>
<p><font size="1" color="#00A1E0" face="sans-serif">Roberto Camarero</font>
<p><font size="1" color="#808080" face="sans-serif">On-board Payload Data Processing Engineer<br>
TEC-EDP / Electrical Engineering Department</font>
<p><font size="1" color="#808080" face="sans-serif"><b>ESTEC</b></font><font size="1" color="#808080" face="sans-serif"><br>
Keplerlaan 1, PO box 299, <br>
NL-2200 AG Noordwijk, The Netherlands</font><font size="1" color="#0000FF" face="sans-serif"><u><br>
</u></font><font size="1" color="#808080" face="sans-serif">roberto.camarero@esa.int | </font><a href="www.esa.int/TEC/OBDP/"><font size="1" face="sans-serif">www.esa.int/TEC/OBDP/</font></a><font size="1" color="#808080" face="sans-serif"><br>
T +31 71 56 53508 | F +31 71 56 56791 | Room: Na308</font><br>
<p>
<p><div class="domino-section"><div class="domino-section-head"><span class="domino-section-title"><font size="2" color="#424282" face="sans-serif">Roberto.Camarero---04/04/2019 06:27:05 PM---Dear working group, As for MHDCA-1810-5 (d) "follow-up with current implementers", we are</font></span></div><div class="domino-section-body"><br>
<br>
<font size="1" color="#5F5F5F" face="sans-serif">From: </font><font size="1" face="sans-serif">Roberto.Camarero@esa.int</font><br>
<font size="1" color="#5F5F5F" face="sans-serif">To: </font><font size="1" face="sans-serif">"sls-mhdc@mailman.ccsds.org" <sls-mhdc@mailman.ccsds.org></font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Date: </font><font size="1" face="sans-serif">04/04/2019 06:27 PM</font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Subject: </font><font size="1" face="sans-serif">[Sls-mhdc] MHDCA-1810-5 review CCSDS-121.0-B-3 draft</font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Sent by: </font><font size="1" face="sans-serif">"SLS-MHDC" <sls-mhdc-bounces@mailman.ccsds.org></font><br>
<hr width="100%" size="2" align="left" noshade style="color:#8091A5; "><br>
<br>
<br>
<font size="2" face="sans-serif">Dear working group,</font><font size="3" face="serif"> <br>
</font><font size="2" face="sans-serif"><br>
As for MHDCA-1810-5 (d) "follow-up with current implementers", we are preparing a list of questions for implementers about the choices they made for the parts that looked ambiguous in the standard (and that we are planing to clarify in the B-3).</font><font size="3" face="serif"> <br>
</font><font size="2" face="sans-serif"><br>
So, we have been through the document again and </font><font size="2" face="sans-serif"><b>we have identified several issues that still seem to be open to interpretation, even in the revised document submitted in November (MHDCA-1810-5 (a)).</b></font><font size="3" face="serif"> <br>
</font><font size="2" face="sans-serif"><b><u><br>
Could you please review the marked-up draft</u></b></font><font size="2" face="sans-serif"> in "CWE Private\121.0-B-3-DRAFT\121x0b3-DRAFT-2019_04_04_ESA_comments.docx" so that we can reach consensus during the next meeting? (the plan is to take also into account the answers from implementers).</font><font size="3" face="serif"> <br>
<br>
</font><font size="2" face="sans-serif"><br>
Thank you for your help & see you next month,</font><font size="3" face="serif"> <br>
</font><font size="2" face="sans-serif"><br>
Kind regards,</font><font size="3" face="serif"> <br>
</font><font size="2" face="sans-serif"><br>
Roberto</font><font size="3" face="serif"> <br>
<br>
<br>
</font><font size="1" color="#808080" face="sans-serif"><b><br>
ESA – European Space Agency</b></font><font size="3" face="serif"> </font><font size="1" color="#00A1E0" face="sans-serif"><br>
Roberto Camarero</font><font size="3" face="serif"> </font><font size="1" color="#808080" face="sans-serif"><br>
On-board Payload Data Processing Engineer<br>
TEC-EDP / Electrical Engineering Department</font><font size="3" face="serif"> </font><font size="1" color="#808080" face="sans-serif"><b><br>
ESTEC</b></font><font size="1" color="#808080" face="sans-serif"><br>
Keplerlaan 1, PO box 299, <br>
NL-2200 AG Noordwijk, The Netherlands<br>
roberto.camarero@esa.int | </font><a href="www.esa.int/TEC/OBDP/"><font size="1" color="#0000FF" face="sans-serif"><u>www.esa.int/TEC/OBDP/</u></font></a><font size="1" color="#808080" face="sans-serif"><br>
T +31 71 56 53508 | F +31 71 56 56791 | Room: Na308</font><font size="3" face="serif"> </font><br>
<tt><font size="3">This message is intended only for the recipient(s) named above. It may contain proprietary information and/or<br>
protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received<br>
this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect<br>
personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo@esa.int).<br>
</font></tt><br>
<tt><font size="2">_______________________________________________<br>
SLS-MHDC mailing list<br>
SLS-MHDC@mailman.ccsds.org<br>
</font></tt><tt><font size="2"><a href="https://mailman.ccsds.org/cgi-bin/mailman/listinfo/sls-mhdc">https://mailman.ccsds.org/cgi-bin/mailman/listinfo/sls-mhdc</a></font></tt><tt><font size="2"><br>
</font></tt><br>
</div></div><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></BODY></HTML>