PhD space physics and astronomy with strong interest in space industrialization and commercial development of the Moon and solar power. Address: Houston, Texas, United States
In situ accumulation of solar elements is studied for the purpose of determining the extent of ap... more In situ accumulation of solar elements is studied for the purpose of determining the extent of applicability of the Rosiwal Principle. The Rosiwal Principle states that the grain exposure area is proportional to the fraction of the unit volume occupied by the grains, and the test involves measurement of the relative concentrations of inert gases and reactive elements across sets of lunar fines samples for which mean grain size, sorting, and minimum radius of surface correlation are known. In some cases, the quantity of an element implanted into the lunar fines from the solar wind is found to be surface correlated, and the implications of this relationship are considered. According to the Rosiwal Principle, coarse soils should retain less inert gas than fine soil. The Principle can also be applied to species volatized or sputtered from the lunar surface and redeposited locally.
Page 1. Sound-producing dune and beach sands JOHN F. LINDSAY Marine Science Institute, University... more Page 1. Sound-producing dune and beach sands JOHN F. LINDSAY Marine Science Institute, University of Texas at Galveston, Galveston, Texas 775SO DAVID R. CRISWELL Lunar Science Institute, 3303 Nasa Road 1, Houston ...
Development of industrial operations in deep space would be prohibitively expensive if most of th... more Development of industrial operations in deep space would be prohibitively expensive if most of the construction and expendable masses had to be transported from earth. Use of lunar materials reduces the needed investments by a factor of 15 to 20. It is shown in this paper that judicious selection of lunar materials will allow one to obtain hydrogen, nitrogen, carbon, helium and other specific elements critical to the support of life in large space habitats at relatively low costs and lower total investment even further. Necessary selection techniques and extraction schemes are outlined. In addition, tables are presented of the oxide and elemental abundances characteristic of the mare and highland regions of the moon which should be useful in evaluating what can be extracted from the lunar soils.
... The expected charging rate exceeds the discharging rate (~ 2 x i03 electrons/cm2 see) due to ... more ... The expected charging rate exceeds the discharging rate (~ 2 x i03 electrons/cm2 see) due to the motion of charged dust grains between the light and dark areas. ... Solar wind does not directlyimpact the sunset terminator due to the (1 0_40) velocity abberation of the wind ...
In situ accumulation of solar elements is studied for the purpose of determining the extent of ap... more In situ accumulation of solar elements is studied for the purpose of determining the extent of applicability of the Rosiwal Principle. The Rosiwal Principle states that the grain exposure area is proportional to the fraction of the unit volume occupied by the grains, and the test involves measurement of the relative concentrations of inert gases and reactive elements across sets of lunar fines samples for which mean grain size, sorting, and minimum radius of surface correlation are known. In some cases, the quantity of an element implanted into the lunar fines from the solar wind is found to be surface correlated, and the implications of this relationship are considered. According to the Rosiwal Principle, coarse soils should retain less inert gas than fine soil. The Principle can also be applied to species volatized or sputtered from the lunar surface and redeposited locally.
Page 1. Sound-producing dune and beach sands JOHN F. LINDSAY Marine Science Institute, University... more Page 1. Sound-producing dune and beach sands JOHN F. LINDSAY Marine Science Institute, University of Texas at Galveston, Galveston, Texas 775SO DAVID R. CRISWELL Lunar Science Institute, 3303 Nasa Road 1, Houston ...
Development of industrial operations in deep space would be prohibitively expensive if most of th... more Development of industrial operations in deep space would be prohibitively expensive if most of the construction and expendable masses had to be transported from earth. Use of lunar materials reduces the needed investments by a factor of 15 to 20. It is shown in this paper that judicious selection of lunar materials will allow one to obtain hydrogen, nitrogen, carbon, helium and other specific elements critical to the support of life in large space habitats at relatively low costs and lower total investment even further. Necessary selection techniques and extraction schemes are outlined. In addition, tables are presented of the oxide and elemental abundances characteristic of the mare and highland regions of the moon which should be useful in evaluating what can be extracted from the lunar soils.
... The expected charging rate exceeds the discharging rate (~ 2 x i03 electrons/cm2 see) due to ... more ... The expected charging rate exceeds the discharging rate (~ 2 x i03 electrons/cm2 see) due to the motion of charged dust grains between the light and dark areas. ... Solar wind does not directlyimpact the sunset terminator due to the (1 0_40) velocity abberation of the wind ...
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