The Earth Observing-1 (EO-1) mission, as part of the New Millennium Program (NMP), developed and validated a number of instrument and spacecraft bus breakthrough technologies designed to enable the development of future earth imaging observatories that will have a significant increase in performance while also having reduced cost and mass.
NASA/Goddard Space Flight Center
<a rel="nofollow" class="external free" href="https://satellitesafety.gsfc.nasa.gov/eo1.html">https://satellitesafety.gsfc.nasa.gov/eo1.html</a> (<a rel="nofollow" class="external text" href="https://satellitesafety.gsfc.nasa.gov/images/EO-1.jpg">image link</a>)