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<div>Dear SLP,</div>
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<div>A new RID for disposition at the SLP meeting in Cleveland. Please see below.</div>
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<div>Thanks John!</div>
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<div>Greg Kazz</div>
<div>Chairman CCSDS SLS-SLP WG </div>
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<span style="font-weight:bold">From: </span>John Pietras <<a href="mailto:john.pietras@gst.com">john.pietras@gst.com</a>><br>
<span style="font-weight:bold">Date: </span>Monday, July 30, 2012 2:46 PM<br>
<span style="font-weight:bold">To: </span>"Kazz, Greg J (313B)" <<a href="mailto:greg.j.kazz@jpl.nasa.gov">greg.j.kazz@jpl.nasa.gov</a>><br>
<span style="font-weight:bold">Subject: </span>inconsistent bit numbering for CLCWs in AOS and TM Space Data Protocol specs<br>
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<p class="MsoNormal">Greg,<o:p></o:p></p>
<p class="MsoNormal">There’s inconsistent usage of “first” bit in the AOS and TM Space Data Protocol specs (732.0-B-2 and 132.0-B-1, respectively).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The boilerplate section 1.6.3, Conventions, states “<span style="font-size:11.5pt;color:black">The first bit in the field to be transmitted (i.e., the most left justified when drawing a figure) is defined to be ‘Bit 0’ ”, and that’s also
illustrated in figure 1-1.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;color:black">However, in section
</span>4.1.5 (OPERATIONAL CONTROL FIELD) the following statements appear:<o:p></o:p></p>
<p class="Paragraph4" style="margin-top:12.0pt;text-align:justify"><b><span style="font-size:11.5pt;color:black">4.1.5.4
</span></b><span style="font-size:11.5pt;color:black">The leading bit of the field, i.e., bit 0, shall contain a Type Flag with the following meanings: …
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:12.0pt;text-align:justify;text-autospace:none">
<b><span style="font-size:11.5pt;font-family:"CJMPLN+TimesNewRoman,Bold","serif";color:black">4.1.5.5
</span></b><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif";color:black">The first bit of a Type-2-Report (i.e., bit 1 of the Operational Control Field) shall indicate the use of this report as follows: …<o:p></o:p></span></p>
<p class="Default"><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif""><o:p> </o:p></span></p>
<p class="Default"><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif"">The last sentence of NOTE 2 under 4.1.5.5 reads “</span><span style="font-size:11.5pt">This issue of the Recommendation does not define the use of Type-2-Reports; however,
it reserves the possibility to do so in future issues by restricting the utilization of the first bit.”
</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">That is, 4.1.5.4 uses the otherwise-undefined term “leading bit” to refer to bit 0, and 4.1.5.5 uses “first bit” to refer to bit 1.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To be consistent with the Conventions ion 1.6.3:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><!--[endif]--> 4.1.5.4 should read “<span style="font-size:11.5pt;color:black">The
<u>first</u> bit of the field, i.e., bit 0, shall contain a Type Flag with the following meanings: …”
</span><o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="font-size:11.5pt;color:black"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--> 4.1.5.5 should read “<span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif";color:black">The
<u>second</u> bit of a Type-2-Report (i.e., bit 1 of the Operational Control Field) shall indicate the use of this report as follows: …”, and
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span style="font-size:11.5pt;color:black"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif";color:black">The last sentence of NOTE 2 under 4.1.5.5 should read “</span><span style="font-size:11.5pt;color:black">This issue of the Recommendation
does not define the use of Type-2-Reports; however, it reserves the possibility to do so in future issues by restricting the utilization of the
<u>second</u> bit.</span><span style="font-size:11.5pt">”</span><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif";color:black">Something to file away in your list of errata to eventually be fixed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif";color:black">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"CJMNDI+TimesNewRoman","serif";color:black">John</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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