水沢測地観測所における低層気温の連続観測

抄録

Atmospheric temperature has been continuously recorded by platinum resistance thermometers at the heights of 1.3m and 16m above ground level in the Mizusawa Geodetic Observatory since June 1973 with the aim of improvement of temperature correction for the optical distance measurement. Remarkable nocturnal inversions are observed especially on fine days. At about 6^h-7^h in the morning and 16^h-18^h in the afternoon, the temperature difference between the upper and lower position becomes zero. The temperature difference remains nearly zero for many hours when it is cloudy. Such a condition might be preferable for the temperature correction of the optical distance measurement.