I.
SoHO, the
Solar and Heliospheric Observatory
A. international project ESA and
NASA
B. studies the solar interior to the
outer corona
C. CDS has good spectral coverage
in EUV
D. 12 instruments
- CDS (Coronal Diagnostics Spectrometer)
- this is the instrument we used
- CELIAS (Charge, Element, and Isotope Analysis System)
- COSTEP (Comprehensive Suprathermal and Energetic Particle
Analyzer)
- EIT (Extreme ultraviolet Imaging Telescope)
- ERNE (Energetic and Relativistic Nuclei and Electron
experiment)
- GOLF (Global Oscillations at Low Frequencies)
- LASCO (Large Angle and Spectrometric
Coronagraph)
- MDI/SOI (Michelson Doppler Imager/Solar Oscillations
Investigation)
- SUMER (Solar Ultraviolet Measurements of Emitted Radiation)
- SWAN (Solar Wind Anisotropies)
- UVCS (Ultraviolet Coronagraph Spectrometer)
- VIRGO (Variability of Solar Irradiance and Gravity
Oscillations)
II. TRACE
, the Transition Region and Coronal Explorer
A. a
NASA small explorer mission (SMEX)
B. studies solar corona and transition region
C. good angular and temporal resolution
D. one instrument with multiple filters
1. the CCD (charge-couple device)