Publication Date:
2022-06-29
Description:
This is a description of a radiosonde equipment for measuring the air-pressure, temperature and humidity simultaneously and continuously. The radiosonde consists of 3 audio-frequency sinewave generators having frequencies proportional to the measured values of a dry-bulb and a wet-bulb resistance thermometer and a pair of aneroid chambers. After receiving the radiosonde signal the 3 audio-frequencies are separated by filters, connected to 3 frequency meters and finally recorded on a double function plotter or on other strip-chart recorders. This equipment has been used for meteorological measurements in the lower troposphere using captive balloons on the research vessel "Meteor" during the 1965 Atlantic Expedition. More than 100 vertical soundings have been recorded up to a maximum ceiling of 2OOO m. The weight of the radiosonde including batteries for 5 hours recording is 1.1 kg. The ambient temperature may be in a range from -28 °C to +60 °C. The accuracy of measurement for the temperatures is ±0.1 °C in a range of 25 °C, for the pressure it is better than ± 1 mb in a range of 300 mb. The resolution for measuring short time changes in smaller ranges is considerably greater.
Type:
Article
,
PeerReviewed
Format:
text
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