After the balloon burst, the level of ozone is estimated by using the following equation with a constant mixing ratio (p3i = p3i+1 = p3END) up to ambient pressure 0 hPa. The equation changes to:
When the pressure is given in hPa, the equation above gives the residual total ozone in DUs.
You can now calculate the total ozone from the equation:
Another option is introduced in the GAW Report 201. Post-calculation is possible, integrated ozone is reported, and you can calculate residual ozone afterwards. The calculation can also be changed in the script.