SOHO European solar satellite. SOHO was a component of the Collaborative Solar-Terrestrial Research (COSTR) Program of the International Solar Terrestrial Physics (ISTP) Program. Solar Observatory satellite built by Matra Marconi Space for ESA, NASA, Europe. Launched 1995. |
ACE American solar satellite. Research satellite built by Johns Hopkins University Applied Physics Laboratory (APL) for NASA, USA. Launched 1997. |