The Temperature Distribution within a Boundary Layer before and after Sunset

Abstract

In order to improve the method of electrooptical distance measurements, the six temperature deviation at the 95% confidence level around sunset was calculated from the air-temperature observations in a boundary layer at Tsukuba, 1981. The minimum deviation less than ±0.5° was observed for 30 minutes before sunset up to 50 m above the ground through the year. If ten-day mean temperature is adopted, the deviation is less than ±0.5°C for a wide range of hight from 0 m to 100 m.