The Accurate Temperature Measuring (ATM) radiosonde is one instrument to quantify the solar radiation error of the temperature measurement. The use of such an instrument is highly encouraged and may be used with additional surface measurements aimed at quantifying the radiation error of different temperature sensors. Uncertainty estimates should be provided for this type of instrument as well and may require additional research. This research will strongly contribute to minimising radiation related uncertainties of temperature measurements. The lead centre may coordinate such efforts.