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Earth's spin rate implied by an Earth-Moon distance, assuming the Earth-Moon angular momentum is conserved (solar tidal drain neglected).

Usage

omega_from_moon_distance(a_RE, L_total = NULL)

Arguments

a_RE

Earth-Moon distance (semi-major axis of the lunar orbit) in Earth radii (numeric vector, > 0; the present-day value is about 60.14). Required (no default).

L_total

Total angular momentum of the Earth-Moon system in kg m^2/s (numeric, > 0), assumed to be conserved. NULL uses the present-day value (computed from today's Earth-Moon distance and length of day). Default=NULL.