Miniaturized Ultraviolet Ozonesonde for Atmospheric Measurements

The design and test results of a simple single-beam ultraviolet photometer for ozone measurements are presented. The instrument has several features that distinguish it from former UV absorption instruments, all of which contribute to a smaller size and much lower power consumption while retaining the advantages of the UV measurement technique. A novel airflow system and advanced electronics are among the most important changes from earlier reported systems. The instrument fits into a package 10 cm in diameter by 60 cm long and weighs under 1.5 kg. Hence, it is well-suited for lightweight airborne applications using kites and balloons, as well as other portable measurement needs. Independent measurements of ozone are made every 4 s, with a sensitivity of 0.3 ppbv ozone (limit of detection for S/N = 3) and a precision of ±2%.