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<p class="MsoNormal"><a name="_MailEndCompose"><span style="color:#1F497D">Fran –
<o:p></o:p></span></a></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D">Apologies for the delay in getting back to you to address your good comments in the reference document.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D">Attached are Dave’s thoughts in reply.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D">But here are some generic thoughts I had in response to your general comment, “I understand that the only different among the TOE_x frames is the motion of the origin
being the axes directions identical in all cases. It may be worth making that explicit or simply making a TOE_x generic where x is the placeholder for the central body identification”:<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo3"><span style="mso-bookmark:_MailEndCompose"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">(1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">I’d like for us to discuss this further. You could be correct that the axes are aligned, but I’m not sure of that: For some other planet or lagrange point etc., could there be a reason to have their
own unique, axis directions as well as unique center names? I don’t know the answer to that.<o:p></o:p></span></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo3"><span style="mso-bookmark:_MailEndCompose"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">(2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">Since the origin of the frame can be different, that makes the frame different in my view. After reviewing all of the various center-names that Alexandru was able to dig up, I’m not comfortable with
using a number to specify the center.<o:p></o:p></span></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l1 level2 lfo3">
<span style="mso-bookmark:_MailEndCompose"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">a.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">But if I’m not comfortable with a number or some other inclusion in the e.g. TOE_XX” moniker, then that means by definition that the center_name must accompany the TOE specification whenever TOE_CB
is used.<o:p></o:p></span></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l1 level2 lfo3">
<span style="mso-bookmark:_MailEndCompose"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">b.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">So… I put in text for all XXXX_CB entries, which states: “… where the central body shall be defined via an accompanying “CENTER_NAME”.<o:p></o:p></span></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo3"><span style="mso-bookmark:_MailEndCompose"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">(3)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">I’m a bit wishy-washy on the ALIGN_CB and ALIGN_EARTH entries myself - - we should discuss further (soon!)<o:p></o:p></span></span></p>
<div>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D">Dan<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D">Daniel L. Oltrogge<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D">SDC Program Mgr. and Sr. Research Astrodynamicist<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D">Center for Space Standards and Innovation<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D">Analytical Graphics, Incorporated<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D">Voice: 719-482-4552; E-mail: oltrogge@agi.com<o:p></o:p></span></span></p>
</div>
<p class="MsoNormal"><span style="mso-bookmark:_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></span></p>
<span style="mso-bookmark:_MailEndCompose"></span>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Fran Martínez Fadrique [mailto:fmartinez@gmv.com]
<br>
<b>Sent:</b> 03 Nov 2017 04:53<br>
<b>To:</b> Oltrogge, Daniel <doltrogge@agi.com>; moims-nav-exec@mailman.ccsds.org<br>
<b>Subject:</b> RE: Requesting your input on proposed SANA entries in support of future CCSDS International standards for space data exchange<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">My contribution to the discussion next week. To the time scales and reference frame part only.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Fran<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> MOIMS-NAV-EXEC [<a href="mailto:moims-nav-exec-bounces@mailman.ccsds.org">mailto:moims-nav-exec-bounces@mailman.ccsds.org</a>]
<b>On Behalf Of </b>Oltrogge, Daniel<br>
<b>Sent:</b> jueves, 2 de noviembre de 2017 14:58<br>
<b>To:</b> <a href="mailto:moims-nav-exec@mailman.ccsds.org">moims-nav-exec@mailman.ccsds.org</a><br>
<b>Subject:</b> [MOIMS-NAV-EXEC] FW: Requesting your input on proposed SANA entries in support of future CCSDS International standards for space data exchange<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Here is the latest set of SANA registry entries that Julie and I have been iterating on, for our discussions next week.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">As you can see below, I’ve reached out to 35 large space operators to solicit their inputs as well, and those are starting to come in (useful inputs).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">For us to discuss on Monday.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">David, I’m interested in what sorts of formats, equations/typesets, figures, etc. that SANA could support (?)<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Dan<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Daniel L. Oltrogge<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">SDC Program Mgr. and Sr. Research Astrodynamicist<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Center for Space Standards and Innovation<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Analytical Graphics, Incorporated<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Voice: 719-482-4552; E-mail: </span>
<span lang="EN-GB"><a href="mailto:oltrogge@agi.com"><span lang="EN-US">oltrogge@agi.com</span></a></span><span style="color:#1F497D"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Oltrogge, Daniel <br>
<b>Sent:</b> 31 Oct 2017 09:38<br>
<b>Subject:</b> Requesting your input on proposed SANA entries in support of future CCSDS International standards for space data exchange<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Flight Dynamics, operations and astrodynamics colleagues – <o:p>
</o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The Space Assigned Numbers Authority (SANA) is the registrar function for the protocol registries created under the Consultative Committee for Space Data Systems (CCSDS). I support the Navigation Working Group (Nav WG) within CCSDS, and
we develop international standards for data exchange of navigation-related elements of information.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are currently exploring the use of the SANA registry as a “living” reference support document to contain definitions of content that are currently duplicated (sometimes inconsistently) across many of the CCSDS standards. The concept
is to have the next generation of CCSDS standards instead reference the SANA registry as the single unified and up-to-date source for definitions of parameters.
<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I would like to get your input on the attached proposed table of entries for definition of:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">(1)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Time systems<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">(2)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Orbit element sets;<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">(3)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Absolute and relative reference frames;<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">(4)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Attitude and attitudinal dynamics definitions and parameters;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In each table, you can see the proposed “key” name and its associated definition. What I’d like to know is: Do the attached tables and content define what you are currently using operationally? Is there anything missing (again that you
are <u>actively</u> using in your operations) that you would like us to consider including in these tables?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If so, please let me know this week for inclusion into our CCSDS Fall meeting discussions next week.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dan<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Daniel L. Oltrogge<o:p></o:p></p>
<p class="MsoNormal">SDC Program Mgr. and Sr. Research Astrodynamicist<o:p></o:p></p>
<p class="MsoNormal">Center for Space Standards and Innovation<o:p></o:p></p>
<p class="MsoNormal">Analytical Graphics, Incorporated<o:p></o:p></p>
<p class="MsoNormal">Voice: 719-482-4552; E-mail: <a href="mailto:oltrogge@agi.com">
oltrogge@agi.com</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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