The measurements of two ceilometers deployed at different heights on a single mountain are compared with the aim of deriving the overlap function of the mountain top ceilometer. Various parameters are analyzed in order to check their influence on the resulting overlap function. It is shown that the method gives good results, especially for overlap values below 0.8 where the noise basically does not affect the results. Furthermore, it is shown that the derived overlap function is relatively stable over time. The temporal variability is much smaller than for the ceilometer of the same type in 1.
Wagner et al. (Thu,) studied this question.