Particle Detectors
type: Concept

SEC
type: Concept
in scheme: instruments
definition: The main science objective of the Ulysses Solar Corona Experiment on Ulysses is to derive the plasma parameters of the solar atmosphere using established coronal-sounding techniques. Applying appropriate model assumptions, the 3-D electron density distribution will be determined from dual-frequency ranging and Doppler measurements recorded at the NASA Deep Space Network during the solar conjunctions. Multi-station observations will be used to derive the plasma bulk velocity at solar distances where the solar wind is expected to undergo its greatest acceleration. As a secondary objective profiting from the favorable geometry during Jupiter encounter, radio-sounding measurements will yield a unique cross-scan of the electron density in the Io Plasma Torus. (Abstract from: M.K. Bird et al., Astron. Astrophys. Suppl. Ser. 92, 425-430, 1992)