From source: "Ice mass measurement by <a href="https://en.wikipedia.org/wiki/NASA" class="extiw" title="w:NASA">NASA</a>'s <a href="https://en.wikipedia.org/wiki/GRACE_and_GRACE-FO" class="extiw" title="w:GRACE and GRACE-FO">GRACE</a> satellites. Gap represents time between missions. Credit: NASA" (includes data from GRACE AND GRACE follow-on)
<ul><li>Version 1 was made with Inkscape.</li>
<li>Most of the code for Version 4 (2022-01-22) was made with the "line graph" spreadsheet documented at <a href="//commons.wikimedia.org/wiki/User:RCraig09/Excel_to_XML_for_SVG" title="User:RCraig09/Excel to XML for SVG">User:RCraig09/Excel to XML for SVG</a>, with subsequent manual edits in text editor to further optimize code.</li>
<li>Versions 4 and 9: Data downloaded from "Get Data HTTP" button at <a rel="nofollow" class="external free" href="https://climate.nasa.gov/vital-signs/ice-sheets/">https://climate.nasa.gov/vital-signs/ice-sheets/</a> (free registration required to download)</li>
<li>Version 9 data listing: <a rel="nofollow" class="external free" href="https://podaac-tools.jpl.nasa.gov/drive/files/allData/tellus/L4/ice_mass/RL06.1/v03/mascon_CRI/antarctica_mass_200204_202211.txt">https://podaac-tools.jpl.nasa.gov/drive/files/allData/tellus/L4/ice_mass/RL06.1/v03/mascon_CRI/antarctica_mass_200204_202211.txt</a> (free registration required to read page)</li></ul>
Employee(s) of NASA, U.S. government, in the ordinary course of their employment duties.
<ul><li>Is an SVG equivalent of NASA chart at <a rel="nofollow" class="external free" href="https://climate.nasa.gov/vital-signs/ice-sheets/">https://climate.nasa.gov/vital-signs/ice-sheets/</a></li>
<li>Archive of 2020-12-09: <a rel="nofollow" class="external free" href="https://web.archive.org/web/20201209114245/https://climate.nasa.gov/vital-signs/ice-sheets/">https://web.archive.org/web/20201209114245/https://climate.nasa.gov/vital-signs/ice-sheets/</a></li>
<li>Archive of 2022-01-22: <a rel="nofollow" class="external free" href="https://web.archive.org/web/20220122055014/https://climate.nasa.gov/vital-signs/ice-sheets/">https://web.archive.org/web/20220122055014/https://climate.nasa.gov/vital-signs/ice-sheets/</a></li></ul>