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    <p>Hi all,</p>
    <p>One little thing<br>
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    <div class="moz-cite-prefix">Le 24/01/2019 à 21:21,
      CresitelloDittmar, Mark a écrit :<br>
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cite="mid:CAH4enyNgPr9Gzc3Z7RtbvcGbCw7Kz-BKSMs=jfF+7DwVK29Fqw@mail.gmail.com">
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          <div>All,<br>
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          Got some additional feedback from Ada off-line which should be
          folded into the next iteration of the document.. see below:<br>
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          <div dir="ltr" class="gmail_attr">On Thu, Jan 24, 2019 at 3:08
            PM CresitelloDittmar, Mark &lt;<a
              href="mailto:mdittmar@cfa.harvard.edu"
              moz-do-not-send="true">mdittmar@cfa.harvard.edu</a>&gt;
            wrote:<br>
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                                <div>Ada,</div>
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                                <div>Thank you for this input.. I'll
                                  address your points here, but also
                                  send a follow-up to the mail list on
                                  items which should go into the next
                                  iteration of the WD.</div>
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                                      <div><b>Section 6.1.3.
                                          TimeFrame.refDirection</b></div>
                                      <div>So here you mean the
                                        coordinates of the observed
                                        object(s)? This is needed for
                                        light travel corrections between
                                        two different observing points
                                        (refPosition) and also for
                                        combining observations taken at
                                        two different moments where the
                                        Earth (or observatory position)
                                        was at a different location and
                                        therefore the solar system
                                        ephemerides is needed. I think
                                        it cannot harm having things
                                        clearly defined and explained to
                                        some level. Maybe this is not
                                        the best phrasing but in those
                                        lines. </div>
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                                  <div><span>ACTION</span>: I'll see
                                    about clarifying the text for
                                    how/when this is used.  Arnold.. any
                                    suggestions?</div>
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    I don't know if clarifying the text is enough. I am surprised to see
    that on the diagram we don't see Ephemeris as an attribute of
    TimeFrame. BUt refDirection is. On the other side GenericFrame
    contains both direction and ephemeris. <br>
    But TimeFrame is not derived from GenericFrame ?<br>
    Should not the diagram be changed also  ?<br>
    <br>
    Cheers<br>
    François <br>
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