Abstract
A new type of radiosonde is described which is suitable for use in measuring the vertical profile of temperature in the lower portion of the atmosphere and investigating the diffusion of atmospheric pollution.
A bead-type glass thermistor is used for measuring the air temperature with an accuracy of ±0.2°C within the range from 35°C to -25°C and a windmill for measuring the height with an accuracy of ±6 meters at the maximum wind course of about 600 meters in any type of weather except strong wind above 15 m/sec, heavy rain and snow. Data telemetry is accomplished by connection of these sensors to a transistorized audiofrequency type radiosonde. Each record for meteorological variables such as temperature and height is read out by use of a linearly graduated scale.
This device is distinguished by simplicity in construction, light weight, cheap price and good measuring accuracy. As illustrations, the meteorological da t a regarding inversion layers below 625 meters, which were obtained at Okuma, Fukushima, Japan, during the period from February 25 to 27 in 1966, are presented.
