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<p class="MsoNormal"><span style="color:black">Dear Colleagues,<o:p></o:p></span></p>
<p class="MsoNormal" style="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="color:black">On 15 Jun 2022, CDDIS will change the way in which GNSS high-rate (sub-hourly, 1-second sampling rate) files are stored in the CDDIS archive. In the past, all 15-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-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-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="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;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">https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/high-rate_data.html</a><o:p></o:p></span></p>
<p class="MsoNormal" style="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;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="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<ol style="margin-top:0in;caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px" start="1" type="1">
<li class="MsoListParagraph" style="color:black;margin-top:0in;margin-bottom:0in;mso-list:l0 level1 lfo3">
15 Jun 2022 – Conversion of all high-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 lfo3">
17 Jun – 1 Aug – Conversion of all high-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 lfo3">
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 lfo3">
3 Aug 2022 – All high-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="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="color:black">As per CDDIS’s agreement with the IGS, there will be a two-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">support-cddis@earthdata.nasa.gov</a><o:p></o:p></span></p>
<p class="MsoNormal" style="caret-color: rgb(0, 0, 0);font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal">R<br>
Pat</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"><a href="mailto:Patrick.Michael@nasa.gov"><span style="color:#044A91">Patrick.Michael@nasa.gov</span></a><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@01D84DE7.EAC2F8E0" 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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