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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Dear Nacho (et al),<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Some thoughts from the GeoNet (NZ) data centre point of view.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="color:windowtext;margin-left:0cm;mso-list:l0 level1 lfo3">
<span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Date: 01 (or 02, based on the GPS week) June 2019 sounds good, and we are very close to switch to a new internal system to handle GNSS data that produces only gzip compressed
rinex (a communication about that will come shortly).<o:p></o:p></span></li><li class="MsoListParagraph" style="color:windowtext;margin-left:0cm;mso-list:l0 level1 lfo3">
<span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">Archive: Although is a giant effort on several different levels, I think that changing compression format on the whole archive will guarantee future data access. The
GeoNet archive currently has made this already, and we presently have both d.Z and o.gz formats in our data storage (more on that below).<o:p></o:p></span></li><li class="MsoListParagraph" style="color:windowtext;margin-left:0cm;mso-list:l0 level1 lfo3">
<span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US">nothing that we are aware of<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">I’d be interested to participate to the telecon, and, I’m interested also in Brian’s comment around compression of
data products in general. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Also, relatively to the compression discussion, I would like to ask what the plans are in terms of Hatanaka compression.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">With modern internet networks, the requirement of compressing the rinex plain text is probably less important.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Although file size is still significantly reduced by applying hatanaka compression, we have decided to move away from
that in order to guarantee future access to the rinex data and decouple that from the RNX2CRX software package.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Hope that helps the conversation,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Elisabetta<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">Elisabetta D’Anastasio</span></b><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#5F5F5F"> I Geodetic
Processing Specialist<br>
</span></b><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#A11F12">GeoNet, GeoHazard Monitoring Department<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#A11F12">GNS Science
</span></b><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#5F5F5F">I</span></b><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#A11F12"> Te Pῡ Ao</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><br>
1 Fairway Drive, Avalon 5010, PO Box 30368, Lower Hutt 5040, New Zealand<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Ph</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> +64 (0) 4 570 4744 I
<b>Mob</b> +64 (02) 27 6655 890 <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><a href="http://www.gns.cri.nz/"><b><span style="color:#A11F12">http://www.geonet.org.nz/</span></b></a></span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">
</span><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#5F5F5F">I</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <b>Email:
</b></span><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><a href="mailto:e.danastasio@gns.cri.nz"><span style="color:#0563C1">e.danastasio@gns.cri.nz</span></a></span></b><b><u><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#A11F12"><br>
<br>
</span></u></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"> IGS-IC <<a href="mailto:igs-ic-bounces@lists.igs.org">igs-ic-bounces@lists.igs.org</a>>
<b>On Behalf Of </b>Nacho Romero<br>
<b>Sent:</b> January 8, 2019 5:28 AM<br>
<b>To:</b> <a href="mailto:igs-dcwg@lists.igs.org">igs-dcwg@lists.igs.org</a>; ic IGS List <<a href="mailto:igs-ic@lists.igs.org">igs-ic@lists.igs.org</a>>; Lou Estey <<a href="mailto:lou@unavco.org">lou@unavco.org</a>>; David Maggert <<a href="mailto:dmaggert@unavco.org">dmaggert@unavco.org</a>>;
MacLeod, Ken (NRCan/RNCan) <<a href="mailto:ken.macleod@canada.ca">ken.macleod@canada.ca</a>><br>
<b>Cc:</b> <a href="mailto:gsfc-cddis-ops@lists.nasa.gov">gsfc-cddis-ops@lists.nasa.gov</a>; Limbacher, Rebecca Irene. (GSFC-690.1)[SCIENCE SYSTEMS AND APPLICATIONS INC] <<a href="mailto:rebecca.i.limbacher@nasa.gov">rebecca.i.limbacher@nasa.gov</a>>; mark.van.kints-esa.int
<<a href="mailto:mark.van.kints@esa.int">mark.van.kints@esa.int</a>><br>
<b>Subject:</b> [IGS-IC-814] compression file changes ...<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p><span lang="EN-CA">Dear all,<o:p></o:p></span></p>
<p><span lang="EN-CA">At the last IGS workshop at the IC+DC splinter meeting we approved the recommendation ...
<o:p></o:p></span></p>
<p><b><span lang="EN-CA" style="font-family:"Calibri",sans-serif">2018-4. </span>
</b><span lang="EN-CA" style="font-family:"Calibri",sans-serif">To coordinate DC, IC and NC so as to move away from Z compression for all IGS files (data and products) and into using gzip (.gz)</span><span lang="EN-CA"><o:p></o:p></span></p>
<p><span lang="EN-CA"><o:p> </o:p></span></p>
<p><span lang="EN-CA">Please provide us comments on the following;<o:p></o:p></span></p>
<p><span lang="EN-CA">1) I propose that we announce this change now with the date 01 June 2019 , and at that point we publish all the newly submitted files (data and products) as .gz in all IGS DCs, whether the owner submits it that way or not ... do you agree
that DCs should enforce such a change or should we insist all the owners transition their own submitted files?
<o:p></o:p></span></p>
<p><span lang="EN-CA"><o:p> </o:p></span></p>
<p><span lang="EN-CA">2) Do we change all the historical files to .gz ? This will generate "new files" which the myriad of sync processes (private and public) running between all sort of servers will cause a lot of duplications ... I propose we leave the old
files as they are for now to avoid a lot of potential duplication of files in IGS and user's servers
<o:p></o:p></span></p>
<p><span lang="EN-CA">3) are you aware of specific places were the .Z compression is requested? required? recommended? ... I think the site guidelines are generic enough, what do you think?<o:p></o:p></span></p>
<p><span lang="EN-CA"><o:p> </o:p></span></p>
<p><span lang="EN-CA">We have some other recommendations to discuss with you in the next few days, and in the next months I will organize a telecon so we can all agree a way forward for each one.<o:p></o:p></span></p>
<p><span lang="EN-CA">Please let us know your comments on this specific recommendation and I will collate all the discussion points for the coordination telecon. Thanks.<o:p></o:p></span></p>
<pre><span lang="EN-CA">-- <o:p></o:p></span></pre>
<pre><span lang="EN-CA">Best regards,<o:p></o:p></span></pre>
<pre><span lang="EN-CA">Nacho<o:p></o:p></span></pre>
<pre><span lang="EN-CA">_______________________________________________________________<o:p></o:p></span></pre>
<pre><span lang="EN-CA"><o:p> </o:p></span></pre>
<pre><span lang="EN-CA">Ignacio (Nacho) Romero<o:p></o:p></span></pre>
<pre><span lang="EN-CA">Aerospace Engineer, PhD<o:p></o:p></span></pre>
<pre><span lang="EN-CA">CSC Ltd @ ESA/ESOC/OPS-GN<o:p></o:p></span></pre>
<pre><span lang="EN-CA">Satellite Navigation Engineer @ ESOC Navigation Support Office<o:p></o:p></span></pre>
<pre><span lang="EN-CA">IGS Infrastructure Committee Chair<o:p></o:p></span></pre>
<pre><span lang="EN-CA"><a href="http://www.navigation-office.esa.int">www.navigation-office.esa.int</a><o:p></o:p></span></pre>
<pre><span lang="EN-CA"><a href="http://www.canaryspaceconsulting.co.uk">www.canaryspaceconsulting.co.uk</a><o:p></o:p></span></pre>
<pre><span lang="EN-CA">_______________________________________________________________<o:p></o:p></span></pre>
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