Abstract: According to an example aspect of the present invention, there is provided a system for solar radiation correction in radiosonde temperature measurements, the system comprising a radiosonde having a temperature sensor configured to determine a temperature of the atmosphere at different altitudes, at least one light sensing assembly comprising a light sensor, and a light collector configured to collect light from different solar radiation angles at the different altitudes, and the system further comprising control electronics or a computing device configured to calculate for each altitude a solar radiation correction based on the signal received by the light sensor in order to obtain a corrected temperature reading for each altitude.

Abstract: According to an example aspect of the present invention, there is provided a system for solar radiation correction in radiosonde temperature measurements, the system comprising a radiosonde having a temperature sensor configured to determine a temperature of the atmosphere at different altitudes, at least one light sensing assembly comprising a light sensor, and a light collector configured to collect light from different solar radiation angles at the different altitudes, and the system further comprising control electronics or a computing device configured to calculate for each altitude a solar radiation correction based on the signal received by the light sensor in order to obtain a corrected temperature reading for each altitude.

Abstract: Method, in particular in radiosondes, for measurement of relative humidity by using a capacitive humidity detector (10) or a combination of detectors (10.sub.1,10.sub.2 ;10P), as well as humidity detectors. In the detector, between the capacitor plates, an insulating material (12) is used, whose permittivity is a function of the amount of water vapor absorbed by the insulating material (12). The detector (10) or the combination of detectors is heated in order to remove any ice, frost or condensed humidity deposited on the face and/or in the environment of the detector. The detector capacitance (C.sub.M) or a part (C.sub.1 . . . C.sub.N) of same is heated, in time and/or in place, periodically by means of electric current (I). The detecting of the detector capacitance (C.sub.M) is carried out without measurement of the detector temperature after the detector capacitance or a part (C.sub.1 . . . C.sub.

Abstract: Method, in particular in radiosondes, for measurement of relative humidity by using a capacitive humidity detector (10) or a combination of detectors (10.sub.1, 10.sub.2 ; 10P), as well as humidity detectors. In the detector, between the capacitor plates, an insulating material (12) is used, whose permittivity is a function of the amount of water absorbed by the insulating material (12). The detector (10) or the combination of detectors is heated in order to remove any ice, frost or condensed humidity deposited on the face and/or in the environment of the detector. The detector capacitance (C.sub.M) or a part (C.sub.1 . . . C.sub.N) of same is heated, in time and/or in place, periodically by means of electric current (I). The detecting of the detector capacitance (C.sub.M) is carried out without measurement of the detector temperature after the detector capacitance or a part (C.sub.1 . . . C.sub.N) of same has cooled down substantially to the temperature of the environment.