The satellites comprising the <a href="https://en.wikipedia.org/wiki/en:A-train_(satellite_constellation)" class="extiw" title="w:en:A-train (satellite constellation)">w:en:A-train (satellite constellation)</a> after the 2009 launches.
NASA
Unknown date<div style="display: none;">Unknown date</div>, uploaded 2009-01-01
<a rel="nofollow" class="external free" href="http://glory.gsfc.nasa.gov/images/a-train.jpg">http://glory.gsfc.nasa.gov/images/a-train.jpg</a>