Note on the Thermistor Psychrograph for the Sounding of the Lower Atmosphere

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The characteristics of th e thermistor psychrograph for the sounding of the lower atmosphere has been studied. The time lag constant of thermistors and their psychrometric constant under various ventilation condition were determined. The effect of solar radiation on the temperature of thermistors in radiation shield was studied., Several results of the Eo-mding with a captive balloon are discussed.