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<p class="MsoNormal">Dear SLP WG,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black;background:white">The purpose of this email is to fix an inconsistency in the Prox-1 Green Book, to make it consistent with the normative Prox-1 Blue Book. Please see the attached power point file
for these changes. Please review the changes in the attached power point file and let me know if you find any problems/issues. I’d like to get your feedback by July 15. I plan to present this change (and any modifications we come up with beforehand) at our
Fall 2022 meeting, so that the Prox-1 GB can reflect this change this year. It is probably easier when evaluating this change to simply print out the “current’ and “proposed” figures. I will upload this file to the CWE directory soon.<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">An inconsistency between the Prox-1 Space Data Link Protocol Blue Book (CCSDS
</span><span style="font-size:11.0pt;color:black;background:white">211.0-B-6) and the Prox-1 GB (CCSDS 210.0-G-2) was brought up to me by the NASA Mars Program. The inconsistency exists in the current Prox-1 Green Book in Section 4.1.3 and the accompanying
Figure 4-3. The inconsistency is that the Green Book states and shows that when a user chooses to immediately move from the hailing channel and on to a working channel, there is an incorrect intermediate step in which the first frame transmitted by the responding
node is currently documented as using the hailing channel. This is in contrast to what is documented in the relevant Prox-1 blue book state table and figure that defines this activity in Section 6.4.2, Figure 6-1 and Table 6-7. (Note that NASA’s Electra transceiver,
both Orbiter and lander versions comply with the Prox-1 Blue Book in this regard). See next paragraph.<br>
<br>
[</span><span style="font-size:11.0pt;color:#4472C4;background:white">Prox-1 Blue Book
</span><span style="font-size:11.0pt;color:black;background:white">] In event E3 in Table 6-7, when the responder receives the hailing directives, it is stated that the receiver and transmitter parameters are set as per the hail directives. Therefore the responder
changes its transmitter to the working frequency. Note that this event happens before the responder sends its first frame back to the caller. The consequence in this case is that the responder sends the first frame on the working frequency, and the caller
must change its receiver to the working frequency beforehand.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black;background:white">[</span><span style="font-size:11.0pt;color:#00B050;background:white">Prox-1 Green Book</span><span style="font-size:11.0pt;color:black;background:white">] In section 4.1.3 and
figure 4-3, I’ve taken a stab at updating both the figure and the text to match the Prox-1 blue book.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black;background:white">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black;background:white">Chair SLP WG</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Greg Kazz<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Principal Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Technical Group Supervisor,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">312B Project Protection, Project Software, and End to End Information System Engineering<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Jet Propulsion Laboratory<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">4800 Oak Grove Dr., M/S 301-490<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES-MX" style="font-size:11.0pt">Pasadena, CA 91109</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES-MX" style="font-size:11.0pt">1+(818)393 6529(voice)</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">1</span><span lang="ES-MX" style="font-size:11.0pt">+(818)393 6871(fax)</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ES-MX" style="font-size:11.0pt">email: greg.j.kazz@jpl.nasa.gov
</span><span style="font-size:11.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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