MIPAS data used for GOMOS validation
Estimates of the natural ozone variation (20° S bis 20° N) are a byproduct of the validation activities. Both the amount and the altitude structure agree well between MIPAS and GOMOS.
The method chosen uses the fact that the sample variance is composed of both measurement noise and natural variability. A detailed description of the method is found in http://www.atmos-meas-tech.net/7/2147/2014/amt-7-2147-2014.pdf