S-scale

A NOAA classification scheme for radiation storm or solar proton event severity and a means of communicating to the general public possible effects to people at high latitudinal altitudes (i.e., polar-region airline flights), to astronauts, or on systems. The S-scale is logarithmic and correlates to the number of energetic protons at the >10-MeV energy level as measured at geosynchronous orbit. The scale is classified as follows: S1 (minor): 10 pfu; S2 (moderate): 100 pfu; S3 (strong): 1000 pfu; S4 (severe): 10 000 pfu; and S5 (extreme): 100 000 pfu.

Space Weather Prediction Center, 2018: Solar radiation storm. Accessed 1 November 2021, https://www.swpc.noaa.gov/phenomena/solar-radiation-storm.

|Explanation=

Term edited 1 November 2021.

A NOAA classification scheme for radiation storm or solar proton event severity and a means of communicating to the general public possible effects to people at high latitudinal altitudes (i.e., polar-region airline flights), to astronauts, or on systems. The S-scale is logarithmic and correlates to the number of energetic protons at the >10-MeV energy level as measured at geosynchronous orbit. The scale is classified as follows: S1 (minor): 10 pfu; S2 (moderate): 100 pfu; S3 (strong): 1000 pfu; S4 (severe): 10 000 pfu; and S5 (extreme): 100 000 pfu.

The path that a satellite follows in its motion through space relative to the attracting body.

1. Regular markings on an instrument used to allow the reading of the measured quantity or setting.

See numerical weather prediction, climate prediction;

Expert system feature that reveals the motivation, justification, or rationalization of its conclusions by presenting goals, facts, and heuristic rules that affected or determined the choice of conclusions.