The Magnetopause Reconnection Voltage Budget and Its Share of the Transpolar Potential

This paper examines the Magnetopause Reconnection Voltage Budget and Its Share of the Transpolar Potential using representative published values, with every headline quantity evaluated numerically in an accompanying calculation script. The principal findings are that solar wind speed km s = 400, southward imf nT = 5, and solar wind electric field mV per m = 2. The analysis states its assumptions explicitly, tests how the conclusions move when the inputs vary across their published ranges, and identifies the measurement that would most improve each estimate. The results are presented as scales, ratios and bounds, as appropriate to each quantity, rather than as precise predictions for individual events.