Computer Science
Scientific paper
Apr 1972
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972moon....4...63d&link_type=abstract
The Moon, Volume 4, Issue 1-2, pp. 63-87
Computer Science
3
Scientific paper
The electrical conductivity of the lunar interior has been determined from magnetic field step transients measured on the lunar dark side. The simplest model which best fits the data is a spherically symmetric three layer model having a nonconducting outer crust of radial thickness ≈ 0.03R moon; an intermediate layer of thicknessΔR≈0.37R moon, with electrical conductivityσ 1 ≈ 3.5 × 10-4 mhos/m; and an inner core of radiusR 2 ≈ 0.6R m with conductivityσ 2 ≈ 10-2 mhos/m. Temperatures calculated from these conductivities in the three regions for an example of an olivine Moon are as follows: crust, < 440 K; intermediate layer, ≈ 890 K; and core, ≈ 1240 K. The whole-moon relative permeability has been calculated from the measurements to beμ/μ 0 = 1.03 ± 0.13. Remanent magnetic fields at the landing sites are 38 ± 3γ at Apollo 12, 43 ± 6 and 103 ± 5γ at two Apollo 14 sites separated by 1.1 km, and 6 ± 4γ at the Apollo 15 site. Measurements show that the 38γ remanent field at the Apollo 12 site is compressed to 54γ by a solar wind pressure increase of 7 × 10-8 dynes/cm2.
Dyal Palmer
Parkin Curtis W.
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