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<p class="MsoNormal">Dear Colleagues,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">As announced in IGSMAIL-8189, CDDIS will begin the process of the consolidation of GNSS high-rate files on 15 June 2022 and expects to complete this consolidation by early August. Our previous announcement on this subject is listed below.
Any questions or comments please direct to <a href="mailto:support-cddis@earthdata.nasa.gov">
support-cddis@earthdata.nasa.gov</a>.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:black">Dear Colleagues,<o:p></o:p></span></p>
<p class="MsoNormal" style="font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style="color:black">On 15 Jun 2022,<span class="apple-converted-space"> </span></span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">CDDIS</span></span><span class="apple-converted-space"><span style="color:black"> </span></span><span style="color:black">will
change the way in which GNSS high</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span><span style="color:black">rate (sub</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span><span style="color:black">hourly,
1</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span><span style="color:black">second sampling rate) files are stored in the<span class="apple-converted-space"> </span></span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">CDDIS</span></span><span class="apple-converted-space"><span style="color:black"> </span></span><span style="color:black">archive.
In the past, all 15</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span><span style="color:black">minute files (96 total per day) were stored individually. Going forward from June 15<sup>th</sup><span class="apple-converted-space"> </span>ALL
high</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span><span style="color:black">rate files older than 6 months in age will be consolidated into a single tar file per monument per day, along with the compression
of the files being changed from Unix compress to gzip. Newer files (from the present to 6 months of age) will continue to be left in the current format of individual 15</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span><span style="color:black">minute
files. As files age out, they will be tar and gzip compressed into the new format. More info can be seen on this page describing the process and naming conventions for files.<o:p></o:p></span></p>
<p class="MsoNormal" style="font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style="color:black"><a href="https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/high-rate_data.html" title="https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/high-rate_data.html"><span style="color:#0563C1">https://</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">cddis</span></span><span style="color:#0563C1">.nasa.gov/Data_and_Derived_Products/GNSS/high</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span><span style="color:#0563C1">rate_data.html</span></a><o:p></o:p></span></p>
<p class="MsoNormal" style="font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style="color:black">Nominal timeline for all changes is as follows:<o:p></o:p></span></p>
<p class="MsoNormal" style="font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<ol style="margin-top:0in;font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px" start="1" type="1">
<li class="MsoListParagraph" style="color:black;margin-top:0in;margin-bottom:0in;mso-list:l0 level1 lfo1">
15 Jun 2022 – Conversion of all high<span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span>rate files from year 2001 and older will commence<o:p></o:p></li><li class="MsoListParagraph" style="color:black;margin-top:0in;margin-bottom:0in;mso-list:l0 level1 lfo1">
17 Jun – 1 Aug – Conversion of all high<span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span>rate files newer than year 2001 will commence from oldest to newest, i.e. 2002, 2003, 2004, etc.<o:p></o:p></li><li class="MsoListParagraph" style="color:black;margin-top:0in;margin-bottom:0in;mso-list:l0 level1 lfo1">
2 Aug 2022 – All conversions should be completed up to the current date minus 6 months, i.e. 2 Feb 2022.<o:p></o:p></li><li class="MsoListParagraph" style="color:black;margin-top:0in;margin-bottom:0in;mso-list:l0 level1 lfo1">
3 Aug 2022 – All high<span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span>rate files older than 6 months will then be converted on a daily basis into the new format.<o:p></o:p></li></ol>
<p class="MsoNormal" style="font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;caret-color: rgb(0, 0, 0);word-spacing:0px">
<span style="color:black">As per<span class="apple-converted-space"> </span></span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">CDDIS</span></span><span style="color:black">’s agreement with the IGS, there will be a two</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-</span></span><span style="color:black">month
period in which community feedback may be heard. Please send all questions and comments to<span class="apple-converted-space"> </span><a href="mailto:support-cddis@earthdata.nasa.gov" title="mailto:support-cddis@earthdata.nasa.gov"><span style="color:#0563C1">support</span><span class="searchhighlight"><span style="color:#070706;background:#FFEE94">-cddis</span></span><span style="color:#0563C1">@earthdata.nasa.gov</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">R<o:p></o:p></p>
<p class="MsoNormal">Pat<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:black">Patrick Michael</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Manager</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Crustal Dynamics Data Information System (CDDIS)</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">NASA-Goddard Space Flight Center</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Greenbelt, MD 20771</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">301-614-5370</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><a href="mailto:Patrick.Michael@nasa.gov"><span style="color:#044A91">Patrick.Michael@nasa.gov</span></a></span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> </span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><img border="0" width="163" height="53" style="width:1.6979in;height:.552in" id="Picture_x0020_1" src="cid:image001.png@01D87B08.C26F0480" alt="signature_1697542868"></span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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