Abstract
A device is described that is suitable for use in measuring the vertical distribution of atmospheric ozone up to 30 km. The method is based on the principle of detecting the reaction of ozone with a neutral buffered halide solution coulometrically, wherein free halogen is liberated. It consists of a platinum gauze cathode and an active carbon anode which are immersed in the solution. When the air containing ozone is drawn into the reaction cell at a constant rate, the electrical current dependent on the ozone amount aspirated flows through the output circuit between the two electrodes. The resulting current is impressed on an amplifier, whose output varies with the magnitude of the input current. Data telemetry is accomplished by periodic connection of the sensor to the radiosonde transmitter. The error in the measured value is estimated to be within ±2%, provided that the shift in background current is corrected, judging from the comparison of the vertically integrated ozone amount with the total amount of ozone measured by the Dobson's spectrometer method. This device is simple in construction, low in cost, easy to handle and stable in operation.
Several successful flight re s ults are discussed from the standpoint of instrumentation.
