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<p class="MsoNormal"><span style="font-size:11.0pt">Hi Guys,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Over the last few days I have been reading through the current (or latest) ASL GB draft. I think that you guys have made great progress and this document is coming together rather nicely. At this point
I am up to page 61, the end of Section 4, or something like 1/3 of the way done.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">In the attached version you will see my mark-up notes. There are a lot of inputs that are simply editorial, and others that are somewhat more substantive. In the "substantive" column I would put the following:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">Most of what is now in Sec 1.1 really, IMHO, belongs in Sec 1.3, Rationale. This is the expected usage in CCSDS Green Books, but they have been known
to vary.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">The MOIMS sections that I have reviewed so far. are very good and quite complete. In fact, they almost seem too complete, but that is another discussion.
If everything is done to this level, as it should be to have an "even" appearance, the doc will be huge.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">The handling of the interfaces between MOIMS and CSS does not strike me as satisfactory. The MOIMS MO services must plan for space links, send data
over space links, and get data of various kinds from space links. It just does not seem acceptable to say "</span>
<span style="font-size:11.0pt">telemetry acquisition and telecommand uplink are communications layer functions that do not directly interact at the application layer with MOIMS functions ". If not MOIMS, then where? Is there an air gap? Does some other CCSDS
area have responsibility? In SCCS-ADD parlance it is "applications" that interact with the SLE and CSTS services. Those application, IMHO, ought to be MOIMS.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">The SOIS materials, by contrast, are good, but seem really incomplete. Notwithstanding that the scope of SOIS is considerably less than that of MOIMS,
the treatment of the SOIS functions and services is itself truncated in the extreme. As much as MOIMS seems a little overblown, SOIS seems totally underinflated. I think we need to seek parallel construction in each of the sections wherever possible. See
in particular my comments in Sec 2.4.2 and 4.3.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">Some of the SOIS limitations are due to the "silverizing" activity that occurred, some of it seems due to a shift in focus by the leadership to implementation
approaches and EDS. Regardless, those SOIS functions and features (support, subnet, wireless) that remain in MB and GB materials really should be adequately covered in this document.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">I like the materials in Sec 3.3, but worry a little that we may be putting too much "RASDS 2.0" materials into this document. There may not really be
much choice, because we have agreed to use these extensions and really must explain what we are doing and why, but it is a little concern.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">The distinctions in type and representation that are used in Sec 3.3 among unspecified, published, under development, proposed, and "no standard identified"
seem, in general, to be not sufficiently distinct to be useful. I think the important distinction is really only between "do we have a standard" and "do we have any sort of plan for a standard". Everything else is just so much idle speculation. Three levels
are probably enough: "it exists", "we have a plan for it", and "something could be (might be) here, but isn’t".<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I'll keep on plugging away at this. Do take a look and see if what I have identified seems reasonable or really off base.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks, Peter<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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