Summary of the unique properties of the global observation system proposed by the IMCP program (IMAGE)
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The geographic and geomagnetic coverage offered by two Great Meridian Circles in quadrature, a primary 120°E–60°W great meridian running over east Asia, west Australia and the Americas (full red vertical bars) and a secondary Great Circle 30°E–150°W extending over central Europe, Africa, Alaska, Hawaii, Polynesia and the Pacific (dashed vertical bars), is near optimum for a simultaneous scientific investigation of the five categories of major hazards affecting geospace: Disturbance A, the Sun-Earth coupling chain and space weather; Disturbance B, lower atmosphere weather, thunderstorms and the global atmospheric electric circuit; Disturbance C, climate change effects in the upper atmosphere; Disturbance D, seismic activity; Disturbance E, long-term evolution of the geomagnetic field.
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