what is a good method to estimate cloud base height using a ceilometer ? any body knows if application of FFT is better after calcluation of CBH from signal on the estimated CBH or is better to do on the ceilometer signal ? any idea about wavelet method on the cloud base heigh?
Neda:
Ceilometer provides you cloud base height. Wavelet application is for better understanding of the structures or waves using FFT techniques etc.
Cloud base is detected using a change in backscattering from the returns. This is already provided you from the ceilometer returns.
Is this clear? if not please send me an email.
IGultepe
Ceilometer is fine.
If you want a rough estimate of cloud base, a good rule of thumb exists for Cumuliform clouds:
CBH= 125*(t-td)
t-td is temperature and dew point depression (in Centigrades) measured at the surface and CBH is in meter. This is an old rule thumb very practical in case ceilometer is not available (it was used by old weather forecaster)
see
http://weatherfaqs.org.uk/book/export/html/164
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