Community GSI Users Page

GSI/ENKF Users Page | Redirect> </head> <body> If you are not redirected automatically, follow this <a href='https://dtcenter.org/community-code/gridpoint-statistical-interpolation-gsi'>link</a>. <!-- <div id="subheader"><!-- begin subheader --> <div id="ncarheader"> <img src="/com-GSI/users/images/header_gsi.jpg" alt="Website header"> </div> <div id="googlesearch"> <form name="google" method="get" action="http://www.google.com/u/ncar" > <a href="http://www.ucar.edu/ucar/search_advanced.shtml">advanced</a> <input type=hidden name=hq value="site:www.ucar.edu"> <input type=submit name=sa value="Search UCAR"> <input type=text name=q size=12 maxlength=255> </form> </div> </div><!-- end subheader --> <!-- Begin main page content --> <div id="breadcrumb_nav"><!-- begin breadcrumb_nav --> <ul> <li>You are here: <a href="/index.php">DTC </a></li> <li>• <i>Community GSI Users Page</i></li> </ul> </div><!-- end breadcrumb_nav --> <div id="column_pagenav"><!-- begin column_pagenav --> <div id="pagenav"><!-- begin pagenav --> <div class="suckerdiv"><!-- begin suckerdiv --> <ul id="suckertree1"> <li><a href="/com-GSI/users/index.php">Home</a></li> <li><a href="/com-GSI/users/others/index_termsofuse_GSI.php">Terms of Use</a></li> <!-- <li><a href="/com-GSI/users/overview/index.php">Overview</a></li> --> <li><a href="/com-GSI/users/support/index.php">User Support</a> <ul> <li><a href="/com-GSI/users/support/faqs/index.php">FAQs</a></li> <!-- <li><a href="/com-GSI/users/support/release_notes/index.php">Release Notes and Plans</a></li> --> <li><a href="/com-GSI/users/support/known_issues/index.php">Known Issues</a></li> <!-- <li><a href="/com-GSI/users/support/feedback/index_feedback.php">Provide Feedback</a></li> --> <li><a href="/com-GSI/users/support/index_help.php">Contact GSI Helpdesk</a></li> <li><a href="/com-GSI/users/support/index_news.php"> Subscribe to GSI News </a></li> </ul> </li> <li><a href="/com-GSI/users/downloads/index.php">Download</a> <ul> <li><a href="/com-GSI/users/downloads/index.php">Annual Release</a></li> <li><a href="/com-GSI/users/downloads/observations/index.php">Observation Data</a></li> <li><a href="/com-GSI/users/downloads/internal/index.php">Internal Info (UCAR only)</a></li> </ul> </li> <li><a href="http://www.dtcenter.org/com-GSI/users/tutorial/index.php">Tutorials</a> <ul> <li><a href="/com-GSI/users/tutorial/index.php">OnLine Tutorial</a></li> <li><a href="/com-GSI/users/tutorial/resident/tutorials_annonce.php"> Tutorial Announcement</a></li> <li><a href="/com-GSI/users/tutorial/resident/previous_tutorials.php"> Previous Residential Tutorials</a></li> </ul> </li> <li><a href="/com-GSI/users/contrib/index.php">Code Contributions</a></li> <li><a href="/com-GSI/users/docs/index.php">Documentation</a></li> <li><a href="/com-GSI/users/pub/index.php">Publication</a></li> <li><a href="/com-GSI/users/contact/index.php">Contact</a></li> <li><a href="/com-GSI/users/others/index_links_GSI.php">Related Links</a></li> </ul> </div><!-- end suckerdiv --> </div><!-- end pagenav --> </div><!-- end column_pagenav --> <div id="wrap_pagecontent"><!-- begin wrap_pagecontent --> <div id="column_pagecontent"><!-- begin column_pagecontent --> <div id="pagefeature"><!-- begin pagefeature --> <div id="headingdiv"><h1>Community Gridpoint Statistical Interpolation System</h1></div> </div><!-- end pagefeature --> <p>Welcome to the users page for the Community Gridpoint Statistical Interpolation (GSI) system. The community GSI system is a variational data assimilation system, designed to be flexible, state-of-art, and run efficiently on various parallel computing platforms. The GSI system is in the public domain and is freely available for community use. </p> <p> The Developmental Testbed Center (<a href="http://www.dtcenter.org/" target="blank">DTC</a>) currently maintains and supports a community version of the GSI system (now at Version 3.7). The testing and support of this GSI system at the DTC currently focus on regional numerical weather prediction (NWP) applications coupled with the Weather Research and Forecasting (<a href="https://www.mmm.ucar.edu/weather-research-and-forecasting-model" target="blank">WRF</a>) Model , but GSI can be applied to Global Forecast System(GFS) as well as other modelling systems. </P> <p> GSI is an operational data assimilation system available for community use. Some of these GSI advanced features is listed as follows: <UL> <li>Combined with an ensemble system, GSI can be used as an 3D/4D ensemble-variational hybrid data assimilation system. </li> <li>GSI features capabilities for observation sensitivity calculation. Coupled with its global model, this feature has been used by NASA for its operational data impact study.</li> <li>GSI can be used as observation observer to provide O-B for EnKF system or other data analysis systems.</li> </UL> </p> <p> For a complete list of the new functions and changes included in the latest release version, as well as the observation data can be used in GSI, please check GSI User's Guide section 1.3. </p> <p> The GSI code management and support are made available through a community GSI effort jointly led by the Developmental Testbed Center (DTC) and the National Centers for Environmental Prediction (NCEP) Environmental Modeling Center (EMC), in collaboration with other GSI developers. To help sustain this effort, we recommend for those who use this community service, please refer to this community GSI effort in their work and publications:<a href="/com-GSI/users/pub/index.php"> Citation </a>. </p> </div><!-- end column_pagecontent --> <div id="column_subcontent_wrap"><!-- begin column_subcontent_wrap --> <div id="column_related_fullwidth1"><!-- begin column_related_fullwidth1 --> <!--<h2>Events</h2> <div id="events"> </div> <h2>Announcements</h2> <div id="events"> </div>--> <h2>GSI/EnKF Announcements</h2> <div id="gsiannouncements"> <p> <b>Release of GSI Version 3.7 and EnKF Version 1.3</b><br> 11.07.2018<br> Please click <a href= "http://www.dtcenter.org/com-GSI/users/index.php">the GSI webpage </a> and <a href= "http://www.dtcenter.org/EnKF/users/index.php">the EnKF webpage </a> for additional information. <br> </p> <p> <b>Release of GSI Version 3.6 and EnKF Version 1.2</b><br> 10.04.2017<br> Please click <a href= "http://www.dtcenter.org/com-GSI/users/index.php">the GSI webpage </a> and <a href= "http://www.dtcenter.org/EnKF/users/index.php">the EnKF webpage </a> for additional information. <br> </p> <p> <b>The 2017 GSI/EnKF residential tutorial, July 11-14, 2017, NCWCP, College Park, MD, USA. </b> <br> Please click <a href= "http://www.dtcenter.org/com-GSI/users/tutorials/2017/index.php">the GSI/EnKF tutorial page </a> to find additional information. <br> </p> <p> <b> helpdesk emails:</b><br> <a href="http://www.dtcenter.org/com-GSI/users/support/index_help.php"> GSI Helpdesk</a>: gsi-help@ucar.edu <br> <a href="http://www.dtcenter.org/EnKF/users/support/index_help.php"> EnKF Helpdesk</a>: enkf-help@ucar.edu <br> </p> </div> </div><!-- end column_related_fullwidth1 --> <div id="column_related_fullwidth1"><!-- begin column_related_fullwidth1 --> <h2>COMMUNITY GSI SPONSORS</h2> <p><a href="http://www.noaa.gov/">National Oceanic and Atmospheric Administration (NOAA)</a><br> <a href="http://www.noaa.gov/"><img src="/com-GSI/users/images/noaa_logo_small.gif" alt="NOAA logo" width="89" height="89" /></a> </p> <p><a href="http://www.ncar.ucar.edu/">National Center for Atmospheric Research (NCAR)</a><br> <a href="http://www.ncar.ucar.edu/"><img src="/com-GSI/users/images/ncar-logo-sm.jpg" alt="NCAR logo" /></a> </p> </div><!-- end column_related_fullwidth1 --> <div id="column_related_fullwidth1"><!-- begin column_related_fullwidth1 --> <h2>COMMUNITY GSI Website Visits</h2> <a href="http://m.maploco.com/details/f1d2dhgy"><img style="border:0px;" src="http://www.maploco.com/vmap/s/3988402.png" alt="Locations of Site Visitors" title="Locations of Site Visitors"/></a> </div><!-- end column_related_fullwidth1 --> </div><!-- end column_subcontent_wrap --> </div><!-- end wrap_pagecontent --> <br class="clearboth"/> <!--end main page content--> <div id="footer"><!-- begin footer --> <p> ©2020, DTC • Postal Address: P.O. Box 3000, Boulder, CO 80307-3000 • Shipping Address: 3090 Center Green Dr. Boulder, CO 80301 • <a href="/index.php?tab=5">Contact</a></em></p> </div><!-- end footer --> <br class="clearboth"/> </div><!-- end content --> </div><!-- end wrap --> </body> </html>