Toward the combination of active and passive remote sensors for temperature and humidty profiling

Collocated radiometer, wind profiler and ceilometer data have been compared with hourly radiosondes. The radiometer measurements show the general evolution of the atmosphere but cannot detect detailed structures of the temperature and humidity profile. In contrast, the signal to noise ratio of the wind profiler reveals lots of structure linked to change in the refractive index. In addition to cloud base information, ceilometer data can in certain situation locate temperature inversions. The location of such discontinuities could be used in the radiometer retrieval to improve the vertical resolution of the retrieved profile.