Image:SOHO instruments pnggray 300.png

The Solar and Heliospheric Observatory (SOHO) has instruments that observe the Sun (upwards in diagram), two solar panels for power, and an antenna for communicating with the Earth (downwards, not shown).

Source: converted from http://sohowww.nascom.nasa.gov/gallery/SC/soho.pdf using Ghostview 4.1 (pnggray 300dpi)

The twelve main instruments are:

• Global Oscillations at Low Frequencies (GOLF) which measures velocity and magnetic field variations of the whole solar disk to explore the core of the sun.
• Variability of Solar Irradiance (VIRGO) which measures oscillations and solar constant both of the whole solar disk and at low resolution, again exploring the core of the sun.
• Michelson Doppler Imager (MDI) which measures velocity oscillations at high resolution, gaining information about the convection zone which forms the outer layer of the interior of the sun.
• Solar UV Measurement of Emitted radiation (SUMER) which measures plasma flows, temperature and density in the corona.
• Coronial Diagnostic Spectrometer (CDS) which measures density, temperature and flows in the corona.
• Extreme UV Imaging Telescope (EIT) which studies the low coronial structure and activity.
• UV Coronagraph and Spectrometer (UVCS) which measures density and temperature in the corona.
• Large Angle Spectrometer Coronagraph (LASCO) which studies the structure and evolution of the corona
• Solar Wind Anisotropies (SWAN) which uses telescopes sensitive to a characteristic wavelength of hydrogen to measure the solar wind mass flux, map the density of the heliosphere, and observe the large-scale structure of the solar wind streams.
• Charge, Element, Isotope Analysis (CELIAS) which studies the ion composition of the solar wind.
• Suprathermal & Energetic Particle Analyser (COSTEP) which studies the ion and electron composition of the solar wind.
• Energetic Particle Analyser (ERNE) which studies the ion and electron composition of the solar wind.

Other SOHO mission images: http://sohowww.nascom.nasa.gov/gallery/SC/

Credit: NASA/ESA

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• Solar and Heliospheric Observatory
• List of Solar System probes
• User:Phoenix-wiki/Workshop/3