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James A. Van Allen journal, October 1955-March 1958
Page 156
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13 January 1957 Some "internal" rocket techniques for getting altitude: (1) roll rate (by solar photocell, for example (crude indicator) (2) solar U.V. (atmospheric absorption as by (O sub 3), etc. -- a very rich range of possibilities with selected spectral ranges) (a) Friedman techniques using gases in ion chamber of selected photo threshold in conjunction with various windows, sapphire, Li F, etc. (b) U.V. sensitive surfaces as in Geiger Tubes (c) Low dispersion quartz spectrometer with P.E. cells
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13 January 1957 Some "internal" rocket techniques for getting altitude: (1) roll rate (by solar photocell, for example (crude indicator) (2) solar U.V. (atmospheric absorption as by (O sub 3), etc. -- a very rich range of possibilities with selected spectral ranges) (a) Friedman techniques using gases in ion chamber of selected photo threshold in conjunction with various windows, sapphire, Li F, etc. (b) U.V. sensitive surfaces as in Geiger Tubes (c) Low dispersion quartz spectrometer with P.E. cells
Van Allen Papers
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