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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Dear Nestor and CESG members,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Please find hereafter, Brigitte’s and my remarks regarding the Russian proposal for Collision Avoidance System standards :<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The proposed system deals with an on-board automated Collision Avoidance System (CAS) between controlled and cooperative satellites.
This is of very limited benefit since the vast majority of close approaches and therefore collision risks are between a controlled satellite and a debris. The most recent collision (Iridium-Cosmos) illustrates this.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Besides, the feasibility of this fully automated on-board CAS is highly questionable since it would require:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0 level2 lfo1">
<![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Proper anticipation of upcoming close approaches which is mandatory and is based on proper screening of ground-based orbital objects
catalogs<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0 level2 lfo1">
<![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In-orbit ranging with very high relative velocity<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0 level2 lfo1">
<![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In-orbit exchange of orbital parameters, orbit models and planned maneuvers<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0 level2 lfo1">
<![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">On-board precision orbit propagation<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0 level2 lfo1">
<![if !supportLists]><span lang="EN-US" style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">On-board collision avoidance manoeuver decision & determination (the automation of this function is unrealistic)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In summary, the proposed system and related standards are of limited usefulness and doubtful feasibility. On the contrary, CCSDS Collision Data
Message (CDM) is widely used by satellite operators to perform collision avoidance from the ground.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Brigitte & Gilles<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Gilles MOURY</span><span lang="EN-US" style="color:#1F497D">
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">CNES Toulouse</span><span lang="EN-US" style="color:#1F497D">
</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">De :</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> cesg-bounces@mailman.ccsds.org [mailto:cesg-bounces@mailman.ccsds.org]
<b>De la part de</b> Nestor.Peccia@esa.int<br>
<b>Envoyé :</b> dimanche 13 septembre 2015 22:17<br>
<b>À :</b> cesg@mailman.ccsds.org<br>
<b>Objet :</b> [CESG] Fw: FSA proposal to CCSDS. Unmanned Spacecraft Flight Safety & Collision Avoidance System<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">to be discussed in the next webex</span>
<br>
<br>
<span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:purple">----- Forwarded by Nestor Peccia/esoc/ESA on 13/09/2015 22:14 -----</span>
<br>
<br>
<span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F">From: </span><span style="font-size:7.5pt;font-family:"Arial","sans-serif"">"Баранников Дмитрий Сергеевич" <<a href="mailto:Mutafyan@tsniimash.ru">Mutafyan@tsniimash.ru</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F">To: </span><span style="font-size:7.5pt;font-family:"Arial","sans-serif"">"<a href="mailto:Nestor.Peccia@esa.int">Nestor.Peccia@esa.int</a>" <<a href="mailto:Nestor.Peccia@esa.int">Nestor.Peccia@esa.int</a>>,
</span><br>
<span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F">Cc: </span><span style="font-size:7.5pt;font-family:"Arial","sans-serif"">"Afarin, James (HQ-LS00)" <<a href="mailto:james.afarin@nasa.gov">james.afarin@nasa.gov</a>>,
"<a href="mailto:dimar@iss-reshetnev.ru">dimar@iss-reshetnev.ru</a>" <<a href="mailto:dimar@iss-reshetnev.ru">dimar@iss-reshetnev.ru</a>>, "<a href="mailto:gourtovaia@gmail.com">gourtovaia@gmail.com</a>" <<a href="mailto:gourtovaia@gmail.com">gourtovaia@gmail.com</a>>,
"Гуртовая Марина" <<a href="mailto:Marina.Gourtovaia@esa.int">Marina.Gourtovaia@esa.int</a>>, "Кузовников Александр витальевич (<a href="mailto:ujub@list.ru">ujub@list.ru</a>)" <<a href="mailto:ujub@list.ru">ujub@list.ru</a>>, "В.Заичко/Коняхин А." <<a href="mailto:opoi@roscosmos.ru">opoi@roscosmos.ru</a>>,
"Tai, Wallace S (<a href="mailto:wallace.s.tai@jpl.nasa.gov">wallace.s.tai@jpl.nasa.gov</a>)" <<a href="mailto:wallace.s.tai@jpl.nasa.gov">wallace.s.tai@jpl.nasa.gov</a>>, "<a href="mailto:Mario.Merri@esa.int">Mario.Merri@esa.int</a>" <<a href="mailto:Mario.Merri@esa.int">Mario.Merri@esa.int</a>></span>
<br>
<span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F">Date: </span><span style="font-size:7.5pt;font-family:"Arial","sans-serif"">12/09/2015 11:24</span>
<br>
<span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#5F5F5F">Subject: </span><span style="font-size:7.5pt;font-family:"Arial","sans-serif"">FSA proposal to CCSDS. Unmanned Spacecraft Flight Safety & Collision Avoidance System</span>
<o:p></o:p></p>
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<span style="font-size:13.5pt">Good day, Nestor, </span><o:p></o:p></p>
<p><span style="font-size:13.5pt"> </span><o:p></o:p></p>
<p><span style="font-size:13.5pt">On behalf of FSA, we would like to propose CESG and CMC to consider a new project, which I told on CMC meeting in Japan. This project concerns the development of Collision Avoidance System (CAS) and it is proposed that standards
will cover the automatic control over spacecraft orbital motion in case of expected or detected hazardous proximity for all spacecraft types. This project becomes actual at present time and especially at closest future in conditions of space debris increasing
on the orbits. </span><o:p></o:p></p>
<p><span style="font-size:13.5pt">We hope that this project will be interesting for all agencies participating in CCSDS.
</span><o:p></o:p></p>
<p><span style="font-size:13.5pt">And we would be very glad to present it more detailed to CCSDS on WG meeting on Darmstadt.
</span><o:p></o:p></p>
<p><span style="font-size:13.5pt"> </span><o:p></o:p></p>
<p><span style="font-size:13.5pt">I enclose a prepared Concept Paper and Presentation of this project.
</span><o:p></o:p></p>
<p><span style="font-size:13.5pt"> </span><o:p></o:p></p>
<p><span style="font-size:13.5pt">We will wait for the answer with impatience, </span>
<o:p></o:p></p>
<p><span style="font-size:13.5pt"> </span><o:p></o:p></p>
<p><span style="font-size:13.5pt">Best regards, </span><o:p></o:p></p>
<p><span style="font-size:13.5pt">Dmitry S. Barannikov, </span><o:p></o:p></p>
<p><span style="font-size:13.5pt">Head of Department “International Standards”, </span>
<o:p></o:p></p>
<p><span style="font-size:13.5pt">The Secretary of the Russian delegation in CCSDS and ISO TC20/SC13.
</span><o:p></o:p></p>
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