Rocket-borne optical ozone dropsonde (roood) for calibrating the satellite observation of stratospheric ozone

Mathematics – Logic

Scientific paper

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Scientific paper

An optical dropsonde using a MT135 meteorological rocket has been developed to measure the altitude distribution of stratospheric ozone. It is based on the solar ultraviolet absorption technique that is self-calibrating, enabling us to retrieve ozone density profiles in the altitude range of 25-50 km with an average error of 3%. The technique is useful for calibrating the satellite measurement of ozone at 35-50 km altitudes where the long-term change of ozone is occuring due to solar and anthropogenic forcings. A test flight was successfully made at Uchinoura (31°N) in August 1990 and two flights each in February and early September 1991. The stratospheric ozone profile is found to be less variable from day to day in late summer at Uchinoura, suggesting a capability for the ozone trend detection in middle and upper stratosphere. A comparison was made with the SAGE II ozone measurement to exhibit a general agreement within +/-10% in the altitude range of 23-47 km.

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