<span style=" font-size:10pt;font-family:sans-serif">Hi Greg, </span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Thank you so much
for providing the updated figure and GB text. </span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">As for the updated
figure, I'm OK with it.</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Regarding the
new text I would propose the following adjustment:</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">From : Upon successful
receipt of the hail, the responder changes both its receive frequency to
Rw1 and its transmit frequency to Tw2 and turns on its transmitter.</span>
<br><span style=" font-size:10pt;font-family:sans-serif">To: Upon successful
receipt of the hail, the responder changes its receive frequency to Rw1,
turns on and configures its transmitter to transmit on the working channel
Tw2.</span>
<br>
<br>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Best regards</span>
<br><span style=" font-size:10pt;font-family:sans-serif">Marco </span>
<br>
<br>
<br>
<br>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">From:
       </span><span style=" font-size:9pt;font-family:sans-serif">"Kazz,
Greg\(US 312B\) via SLS-SLP" <sls-slp@mailman.ccsds.org></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
       </span><span style=" font-size:9pt;font-family:sans-serif">"Kazz,
Greg (US 312B) via SLS-SLP" <sls-slp@mailman.ccsds.org></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Cc:
       </span><span style=" font-size:9pt;font-family:sans-serif">"Shihabi,
Mazen M\(US 337K\)" <mshihabi@jpl.nasa.gov></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
       </span><span style=" font-size:9pt;font-family:sans-serif">29/06/2022
03:08</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
       </span><span style=" font-size:9pt;font-family:sans-serif">[Sls-slp]
Proposed update to Prox-1 GB (CCSDS 210.0-G-2)</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Sent
by:        </span><span style=" font-size:9pt;font-family:sans-serif">"SLS-SLP"
<sls-slp-bounces@mailman.ccsds.org></span>
<br>
<hr noshade>
<br>
<br>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:12pt;font-family:Calibri">Dear
SLP WG,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:12pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">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>
</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">An
inconsistency between the Prox-1 Space Data Link Protocol Blue Book (CCSDS
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:11pt;color:#4181c0;font-family:Calibri">Prox-1
Blue Book </span><span style=" font-size:11pt;font-family:Calibri">] 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.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">[</span><span style=" font-size:11pt;color:#008250;font-family:Calibri">Prox-1
Green Book</span><span style=" font-size:11pt;font-family:Calibri">] 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.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Best
regards,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Chair
SLP WG</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:12pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Greg
Kazz</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Principal
Engineer</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Technical
Group Supervisor,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">312B
Project Protection, Project Software, and End to End Information System
Engineering</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Jet
Propulsion Laboratory</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">4800
Oak Grove Dr., M/S 301-490</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Pasadena,
CA 91109</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">1+(818)393
6529(voice)</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">1+(818)393
6871(fax)</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">email:
greg.j.kazz@jpl.nasa.gov </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:12pt;font-family:Calibri"> [attachment
"fd_link_est2_wc_GB_June_28_2022.ppt" deleted by Marco Rovatti/estec/ESA]
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