Genesis on-board determination of the solar wind flow regime

Details Genesis on-board determination of the solar wind flow regime Genesis on-board determination of the solar wind flow regime

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ssrv..105..661n&link_type=abstract

Space Science Reviews, v. 105, Issue 3, p. 661-679 (2003).

Mathematics

Logic

23

Scientific paper

Some of the objectives of the Genesis mission require the separate collection of solar wind originating in different types of solar sources. Measurements of the solar wind protons, alpha particles, and electrons are used on-board the spacecraft to determine whether the solar-wind source is most likely a coronal hole, interstream flow, or a coronal mass ejection. A simple fuzzy logic scheme operating on measurements of the proton temperature, the alpha-particle abundance, and the presence of bidirectional streaming of suprathermal electrons was developed for this purpose. Additional requirements on the algorithm include the ability to identify the passage of forward shocks, reasonable levels of hysteresis and persistence, and the ability to modify the algorithm by changes in stored constants rather than changes in the software. After a few minor adjustments, the algorithm performed well during the initial portion of the mission.

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