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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Dear Data Link Experts,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif">Reminder: <o:p>
</o:p></span></b></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">The next AEEC Data Link (DLK) Subcommittee web conference is scheduled for Thursday, July 23<sup>rd</sup>.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">This is a joint meeting with RTCA SC-214 and EUROCAE WG-92.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">The meeting will start at 1100 Eastern USA/1700 Central European.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Arial",sans-serif">The WebEx meeting invitation can be found at the end of this email transmittal.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif">Presentations from the July 20<sup>th</sup> web conference can be found in the AEEC DLK Systems Subcommittee SharePoint<o:p></o:p></span></p>
<p class="MsoNormal">The following two main topics were discussed during the July 20<sup>th</sup> web conference:
<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo1">VDL interference at the terminal area
<o:p></o:p></li><ol style="margin-top:0in" start="1" type="a">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level2 lfo1">Commonly caused by LCD lights<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level2 lfo1">Ground Station is uplinks to the VHF Digital Radio<o:p></o:p></li></ol>
</ol>
<p class="MsoListParagraph" style="margin-left:1.5in;text-indent:-1.5in;mso-text-indent-alt:-9.0pt;mso-list:l2 level3 lfo1">
<![if !supportLists]><span style="mso-list:Ignore"><span style="font:7.0pt "Times New Roman"">
</span>i.<span style="font:7.0pt "Times New Roman""> </span></span><![endif]>The A/C does not communicate with the Ground Station due to the interference, probably considers the channel occupied<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<ol style="margin-top:0in" start="3" type="a">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level2 lfo1">Once the A/C moves a few feet from the gate, communication is restored; the Gnd Station receives a bunch of RR frames<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level2 lfo1">Looking at possible discrepancy in the standards (ICAO Tech Doc/MASPS/ARINC 631<o:p></o:p></li></ol>
</ol>
<p class="MsoListParagraph" style="margin-left:1.5in;text-indent:-1.5in;mso-text-indent-alt:-9.0pt;mso-list:l2 level3 lfo1">
<![if !supportLists]><span style="mso-list:Ignore"><span style="font:7.0pt "Times New Roman"">
</span>i.<span style="font:7.0pt "Times New Roman""> </span></span><![endif]>Is measurement taken at the receiver (VDR) or Antenna)?, are cable/antenna losses accounted for
<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<ol style="margin-top:0in" start="5" type="a">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level2 lfo1">Is the location of the VHF antenna a factor ?<o:p></o:p></li></ol>
</ol>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">Most logical solution is for airports to remove the apparent “complaint” LCDs<br>
Airborne changes not recommended (hard to retrofit all the avionics equipment in the field)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0in" start="2" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo1">Connectionless VDLM2<o:p></o:p></li><ol style="margin-top:0in" start="1" type="a">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level2 lfo1">Reviewed “connectionless VDLM2 effect on Standards” (MASPS and MOPS, ICAO Doc 9776 (Tech Manual), ARINC 631-9, ARINC 758 and ARINC 618-9), doc maintained by M. Matyas (The Boeing Company)<o:p></o:p></li></ol>
</ol>
<p class="MsoListParagraph" style="margin-left:1.5in;text-indent:-1.5in;mso-text-indent-alt:-9.0pt;mso-list:l2 level3 lfo1">
<![if !supportLists]><span style="mso-list:Ignore"><span style="font:7.0pt "Times New Roman"">
</span>i.<span style="font:7.0pt "Times New Roman""> </span></span><![endif]>Recent inputs from Mike Matyas (The Boeing Company), Christophe Visee (Eurocontrol) and Tom McGuffin (Spectralux)<o:p></o:p></p>
<ol style="margin-top:0in" start="2" type="1">
<ol style="margin-top:0in" start="2" type="a">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level2 lfo1">Still to determine:<o:p></o:p></li></ol>
</ol>
<p class="MsoListParagraph" style="margin-left:1.5in;text-indent:-1.5in;mso-text-indent-alt:-9.0pt;mso-list:l2 level3 lfo1">
<![if !supportLists]><span style="mso-list:Ignore"><span style="font:7.0pt "Times New Roman"">
</span>i.<span style="font:7.0pt "Times New Roman""> </span></span><![endif]>Should IPS be supported by connectionless VDLM2 only? or can it also be supported over connected VDL? requirement or only a recommendation (for interim period?)<o:p></o:p></p>
<ol style="margin-top:0in" start="2" type="1">
<ol style="margin-top:0in" start="2" type="a">
<ol style="margin-top:0in" start="1" type="i">
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level4 lfo1">Depends on DSPs
<o:p></o:p></li></ol>
</ol>
</ol>
</ol>
<p class="MsoListParagraph" style="margin-left:1.5in;text-indent:-1.5in;mso-text-indent-alt:-9.0pt;mso-list:l2 level3 lfo1">
<![if !supportLists]><span style="mso-list:Ignore"><span style="font:7.0pt "Times New Roman"">
</span>ii.<span style="font:7.0pt "Times New Roman""> </span></span><![endif]>Will orange protocol only support IPS<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The attached white papers were discussed:<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo4">VDL interference white paper by Steve Leger Collins Aerospace IMS
<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo4">Calculations provided by Dr. Dongsong Zeng (The MITRE Corporation)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo4">Standards Comparison by Christophe Visee (Eurocontrol)<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo4">Connectionless VDLM2 Impact on Standards by Mike Matyas, (The Boeing Company)<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt;font-family:"Tahoma",sans-serif;color:red">You are invited to attend the following ARINC IA Web Conference:<o:p></o:p></span></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><a name="ipw-end"></a><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">DLK Systems Subcommittee
<br>
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<br>
<br>
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<p class="MsoNormal"><s><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#005195">–––––––––––––––––––––––––––––––––</span></s><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#005195">José Godoy</span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#005195">Senior Principal Engineer</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"> </span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#005195">ARINC Industry Activities</span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#005195">An SAE-ITC Industry Program</span></b><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#616365">16701 Melford Blvd., Suite 120<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#616365">Bowie, MD 20715<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#616365">o +1.
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#595959">240.334.2583<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#616365">m +1. 443.534.8925</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#595959">
</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#616365">e</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#616365"> </span><u><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:blue"><a href="mailto:jose.godoy@sae-itc.org"><span style="color:#0563C1">jose.godoy@sae-itc.org</span></a></span></u><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><a href="http://www.aviation-ia.com/">www.aviation-ia.com</a></span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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