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James A. Van Allen journal, December 1954-October 1955

Page 3

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The temperature was 23 degrees Celsius on the ground, minimum of -71 degrees C at 50,000 feet, rose to -22 degrees C at 133,000 feet. Detailed graphs of temperature & wind vectors as a function of altitude are shown. [Graph] graph detailing balloon flight, windspeeds, wind directions?, temperatures (-71 to +22 degrees C), altitude (0 to ~140,000 feet) [140,000 feet = 42.7 cm.] 5 lb. radio sonde 17 lb. balloon 19 feet barely inflated diameter First became spherical at ~35,000 feet 75 feet = diameter at 140,000 feet altitude ( over-----> )
 
Van Allen Papers