Stratospheric ozone profiles from satellite and ground-based instruments are collected at different local times. To create a homogeneous long-term record of ozone from these sensors one needs to remove possible biases between instruments caused by diurnal effects. Scientists from the measurement and modelling community develop together a consensus about the diurnal ozone cycle and its relation to solar tides.



Figure from Schanz et al., ACPD, 2014: