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James A. Van Allen lab journal, September 1959-January 1961
Page 3
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Dr. Etienne Vassy (and Mme. Arlette Vassy) Director of Laboratory of Physics of the Atmosphere University of Paris Ozone-sonde : Sunlight-Diffusing Hemisphere -- two filters: one 2500-3800 A and second movable one which intermittently is just in place to absorb the short wave length portion of the above band.
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Dr. Etienne Vassy (and Mme. Arlette Vassy) Director of Laboratory of Physics of the Atmosphere University of Paris Ozone-sonde : Sunlight-Diffusing Hemisphere -- two filters: one 2500-3800 A and second movable one which intermittently is just in place to absorb the short wave length portion of the above band.
Van Allen Papers
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