Flag of the <a href="//commons.wikimedia.org/wiki/Space_Shuttle_Columbia" class="mw-redirect" title="Space Shuttle Columbia">Space Shuttle Columbia</a>, generally flown at the Kennedy Space Center while the orbiter was on the launch pad or on a mission.
<a href="//commons.wikimedia.org/wiki/User:Clindberg" class="mw-redirect" title="User:Clindberg">Carl Lindberg</a>
Self-made, with all dimensions guesstimated from looking at images of flags.  Space Flight Awareness logo copied from <a href="//commons.wikimedia.org/wiki/File:NASA-SpaceFlightAwareness-Logo.svg" title="File:NASA-SpaceFlightAwareness-Logo.svg">File:NASA-SpaceFlightAwareness-Logo.svg</a>.