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Energetic Particle Experiment ERNE
Valtonen, E.; Peltonen, P.; Eronen, T. +12 more
The Energetic and Relativistic Nuclei and Electron (ERNE) experiment will investigate the solar atmosphere and the heliosphere by detecting particles produced in various kinds of energy release processes. ERNE is at the upper end in energy among the SOHO particle instruments. The instrument will measure the energy spectra of elements in the range …
COSTEP - Comprehensive Suprathermal and Energetic Particle Analyser
Sierks, H.; Kunow, H.; Müller-Mellin, R. +16 more
The COSTEP experiment on SOHO forms part of the CEPAC complex of instruments that will perform studies of the suprathermal and energetic particle populations of solar, interplanetary, and galactic origin. Specifically, the LION and EPHIN instruments are designed to use particle emissions from the Sun for several species (electrons, protons, and he…
SWAN: A Study of Solar Wind Anisotropies on SOHO with Lyman Alpha Sky Mapping
Schmidt, W.; Dimarellis, E.; Torsti, J. +22 more
On board the SOHO spacecraft poised at L1 Lagrange point, the SWAN instrument is mainly devoted to the measurement of large scale structures of the solar wind, and in particular the distribution with heliographic latitude of the solar wind mass flux. This is obtained from an intensity map of the sky Lymanα emission, which reflects the shape of the…
Numerical Modeling of Coronal Mass Ejections Based on Various Pre-Event Model Atmospheres
Wu, S. T.; Poletto, G.; Suess, S. T. +1 more
We examine how the initial state (pre-event corona) affects the numerical MHD simulation for a coronal mass ejection (CME). Earlier simulations based on a pre-event corona with a homogeneous density and temperature distribution at the lower boundary (i.e., solar surface) have been used to analyze the role of streamer properties in determining the …
SOHO Ground Segment, Science Operations, and Data Products
St. Cyr, O. C.; Gurman, J. B.; Martens, P. C. H. +2 more
We describe the ground segment, pre-launch operations concepts, and data products supporting the SOHO mission. Our goal is threefold: first, we provide a historical view of the design and development of the systems described here, as a background perspective to those who will use the system and those who may build such systems for future missions.…