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James A. Van Allen journal, October 1955-March 1958
Page 27
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H = 0.46906 +- 0.00001 gauss. Observational period - 5 seconds. For relative values, H can be determined to an accuracy of ~ 1 x 10 to the -6 gauss -------------------------- This method looks ideally suited to our rocket & balloon borne program. (Cahill) I discussed with Cahill today [sketch/picture] drawing including amplifier and transmitter [sketch/picture/schematic] schematic including audio output, Clarke receiver, C.R.O., and camera, tuning fork controlled precision oscillator (U.S. Time Products ?) We have one good to (1/(10 to exponent 5)) at 200 c.p.s. Can get others up to 20 kc/sec.
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H = 0.46906 +- 0.00001 gauss. Observational period - 5 seconds. For relative values, H can be determined to an accuracy of ~ 1 x 10 to the -6 gauss -------------------------- This method looks ideally suited to our rocket & balloon borne program. (Cahill) I discussed with Cahill today [sketch/picture] drawing including amplifier and transmitter [sketch/picture/schematic] schematic including audio output, Clarke receiver, C.R.O., and camera, tuning fork controlled precision oscillator (U.S. Time Products ?) We have one good to (1/(10 to exponent 5)) at 200 c.p.s. Can get others up to 20 kc/sec.
Van Allen Papers
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