http://lasco-www.nrl.navy.mil/
LASCO
Large Angle and Spectrometric Coronagraph - Wikipedia, the free
encyclopedia
The
Large Angle and Spectrometric Coronagraph (LASCO) is one of a number of
instruments aboard the Solar and Heliospheric Observatory satellite (SOHO).
LASCO consists of three solar coronagraphs with nested fields of view.