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<div><span style="font-size: 16px;">Thanks Wolfgang. I was not in any way suggesting that we add voluminous Green Book materials, nor that we slight any of the key features, such as those you mentioned in the OCF section.</span></div>
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<div><span style="font-size: 16px;">What I was doing was proposing that we add a modest paragraph or two (or even three) to the introductory sections of these documents. In many cases, as in OCF, that sort of simple "here is what this does and why it is important"
intro was missing. Right now the ROCF devotes page after page of introductory "Green Book material" to definitions of the service itself, to the SLE reference model, service management, return frame and OCF production and provisioning, scheduling, underlying
services, buffering, security aspects, etc, etc. These introductory materials are the first 47 pages of the spec.</span></div>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 11pt;"><o:p>I think we can do beter by our users, without being unnecessarily duplicative by including too much Green Book material in a Blue Book.</o:p></p>
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<p class="MsoNormal" style="margin: 0in 0in 0.0001pt; font-size: 11pt;"><o:p>Best regards, Peter</o:p></p>
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<span style="font-weight:bold">From: </span>Wolfgang Hell <<a href="mailto:Wolfgang_._Hell@t-online.de">Wolfgang_._Hell@t-online.de</a>><br>
<span style="font-weight:bold">Date: </span>Thursday, May 21, 2015 at 3:21 AM<br>
<span style="font-weight:bold">To: </span>"<a href="mailto:Margherita.di.Giulio@esa.int">Margherita.di.Giulio@esa.int</a>" <<a href="mailto:Margherita.di.Giulio@esa.int">Margherita.di.Giulio@esa.int</a>>, Erik Barkley <<a href="mailto:Erik.J.Barkley@jpl.nasa.gov">Erik.J.Barkley@jpl.nasa.gov</a>><br>
<span style="font-weight:bold">Cc: </span>CSTS-WG <<a href="mailto:css-csts@mailman.ccsds.org">css-csts@mailman.ccsds.org</a>>, "<a href="mailto:Holger.Dreihahn@esa.int">Holger.Dreihahn@esa.int</a>" <<a href="mailto:Holger.Dreihahn@esa.int">Holger.Dreihahn@esa.int</a>>,
Peter Shames <<a href="mailto:peter.m.shames@jpl.nasa.gov">peter.m.shames@jpl.nasa.gov</a>>, "John Pietras (<a href="mailto:pietras@gst.com">pietras@gst.com</a>)" <<a href="mailto:pietras@gst.com">pietras@gst.com</a>>, Tom Gannett <<a href="mailto:thomas.gannett@tgannett.net">thomas.gannett@tgannett.net</a>><br>
<span style="font-weight:bold">Subject: </span>Re: An update to the ROCF SLE recommendation that can be done by the scretariat<br>
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<div class="moz-cite-prefix">Dear All,<br>
<br>
I'm in favor of promoting whenever possible the use of CCSDS standards and if we can do something that helps the reader and therefore potential "customer" to digest the sometimes fairly complex material, I won't object. However, given that the SLE services
extend the space link by providing a standard mechanism to access space link data, in my mind it is implied that understanding SLE services requires familiarity with the space link protocols which define the data that SLE services deal with. In fact, all SLE
books have been written with that understanding in mind. I completely agree with Peter's analysis that the ROCF book contains all relevant references to the space link protocols and as such is complete. I also completely agree that in CCSDS we deal with other
relevant standards by reference rather than inclusion. I'm sure we all agree that SLE books are not the right place to present Green Book type material related to space link protocols.<br>
<br>
In the spirit of helping the reader I do not mind adding a sentence or two regarding why the ROCF service got "invented". However, my concern regarding the sentence proposed by Peter is that it might create the impression that the only purpose of the OCF is
carrying the CLCW. While undoubtedly in most cases this is what the OCF is used for, other OCF types exist as well and are covered in detail in the ROCF-START operation. Therefore, if we add any material explaining what the OCF is, we shall not limit it to
the CLCW case. Even if we add some explanation of what the OCF is, the reader may still fail to grasp why we cared to "invent" the ROCF service, given that via RAF and/or RCF we can get the frames that contain the OCFs of interest as well. We should add a
few words regarding the potential need for low-latency delivery of the OCFs also in cases where the total space link data rate (significantly) exceeds the terrestrial communications bandwidth.<br>
<br>
Best regards,<br>
Wolfgang <br>
<br>
Am 20.05.2015 um 12:18 schrieb <a class="moz-txt-link-abbreviated" href="mailto:Margherita.di.Giulio@esa.int">
Margherita.di.Giulio@esa.int</a>:<br>
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<blockquote cite="mid:30037_1432117114_555C5F7A_30037_48_1_OFF7CD4000.643CA6D5-ONC1257E4B.0025FBAE-C1257E4B.0038A10E@esa.int" type="cite">
<font face="sans-serif" size="2">Dear Erik and All,</font> <br>
<font face="sans-serif" size="2">I managed to read the sequence of e-mails on this subject only today, as I am on mission for the whole week, I have no problem with instructing Secretariat about the introduction of the suggested sentence. However, one should
first look into the R-OCF Recommendation and think of the appropriate place where to put it. Also, one may want to check if analogous sentences need to be introduced in other SLE Recommendations.</font><br>
<font face="sans-serif" size="2">I will have time to look into this only next week ( and I will coordinate with Wolfgang).
</font><br>
<font face="sans-serif" size="2">I do not know how far the editor is with the Pink Books ( may be Tom can tell us), If there is still a chance to introduce this change, say by the end of next week, then it is all right. Otherwise, we can keep this change
in mind as a RID to be issued during the agency Review, as somebody suggested in one of the pervious e-mails.</font><br>
<font face="sans-serif" size="2">Kind regards,<br>
Margherita</font> <br>
<br>
<font face="sans-serif" size="2">-------------------------------------------------------------<br>
Margherita di Giulio<br>
Ground Station Back-end Section (HSO-GIB)<br>
European Space Agency ESA/ESOC<br>
Robert-Bosch-Str. 5<br>
D-64293 Darmstadt - Germany<br>
Tel: +49-6151-902779<br>
e-mail: <a class="moz-txt-link-abbreviated" href="mailto:Margherita.di.Giulio@esa.int">
Margherita.di.Giulio@esa.int</a><br>
</font><br>
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<font color="#5f5f5f" face="sans-serif" size="1">From: </font><font face="sans-serif" size="1">"Barkley, Erik J (3970)"
<a class="moz-txt-link-rfc2396E" href="mailto:erik.j.barkley@jpl.nasa.gov"><erik.j.barkley@jpl.nasa.gov></a></font><br>
<font color="#5f5f5f" face="sans-serif" size="1">To: </font><font face="sans-serif" size="1"><a class="moz-txt-link-rfc2396E" href="mailto:Margherita.di.Giulio@esa.int">"Margherita.di.Giulio@esa.int"</a><a class="moz-txt-link-rfc2396E" href="mailto:Margherita.di.Giulio@esa.int"><Margherita.di.Giulio@esa.int></a>,
<a class="moz-txt-link-rfc2396E" href="mailto:Wolfgang_._Hell@t-online.de">"Wolfgang_._Hell@t-online.de"</a><a class="moz-txt-link-rfc2396E" href="mailto:Wolfgang_._Hell@t-online.de"><Wolfgang_._Hell@t-online.de></a>,
<a class="moz-txt-link-rfc2396E" href="mailto:Holger.Dreihahn@esa.int">"Holger.Dreihahn@esa.int"</a><a class="moz-txt-link-rfc2396E" href="mailto:Holger.Dreihahn@esa.int"><Holger.Dreihahn@esa.int></a>,
</font><br>
<font color="#5f5f5f" face="sans-serif" size="1">Cc: </font><font face="sans-serif" size="1">"Shames, Peter M (312B)"
<a class="moz-txt-link-rfc2396E" href="mailto:peter.m.shames@jpl.nasa.gov"><peter.m.shames@jpl.nasa.gov></a>, "CCSDS Secretariat (<a class="moz-txt-link-abbreviated" href="mailto:thomas.gannett@tgannett.net">thomas.gannett@tgannett.net</a>)"
<a class="moz-txt-link-rfc2396E" href="mailto:thomas.gannett@tgannett.net"><thomas.gannett@tgannett.net></a>, "John Pietras (<a class="moz-txt-link-abbreviated" href="mailto:pietras@gst.com">pietras@gst.com</a>)"
<a class="moz-txt-link-rfc2396E" href="mailto:pietras@gst.com"><pietras@gst.com></a>,
<a class="moz-txt-link-rfc2396E" href="mailto:css-csts@mailman.ccsds.org">"css-csts@mailman.ccsds.org"</a><a class="moz-txt-link-rfc2396E" href="mailto:css-csts@mailman.ccsds.org"><css-csts@mailman.ccsds.org></a></font><br>
<font color="#5f5f5f" face="sans-serif" size="1">Date: </font><font face="sans-serif" size="1">13/05/2015 21:03</font><br>
<font color="#5f5f5f" face="sans-serif" size="1">Subject: </font><font face="sans-serif" size="1">An update to the ROCF SLE recommendation that can be done by the scretariat</font><br>
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<font face="Calibri" size="2">Margherita, Wolfgang, Holger,</font> <br>
<font face="Calibri" size="2"> </font> <br>
<font face="Calibri" size="2">With regard to the SLE books about to have pink sheet reviews, a question (please see previous email today) arose about adding an editorial sentence to the SLE blue books. Peter has suggested the following addition to the ROCF
blue book:</font> <br>
<font face="Calibri" size="2"> </font> <br>
<font face="Calibri" size="2"> </font> <br>
<font face="Calibri" size="2">"TC defines and uses the CLCW, which is carried in the TM (or AOS) OCF field for use in COP re-transmission operations. The ROCF service is used to provide this CLCW to the user so that these re-transmission operations may be
implemented in the user MOC."</font> <br>
<font face="Calibri" size="2"> </font> <br>
<font face="Calibri" size="2">We can issue specific instructions to the secretariat as to exactly where to add this type of sentence. It seems reasonable to me. I would appreciate your comments on doing this, and if you concur I see no reason why this could
not be included as part of the pink sheets going out for agency review. </font><br>
<font face="Calibri" size="2"> </font> <br>
<font face="Calibri" size="2">Best regards,</font> <br>
<font face="Calibri" size="2"> </font> <br>
<font face="Calibri" size="2">-Erik</font> <br>
<font face="Calibri" size="2"> </font> <br>
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