!!! Important !!!

In the full Doppler spectra (fft data from October 13, 14, 20, 21, 22),
different noise features were detected from time to time.
Algorithms to remove these artifacts would require changes in
the original fft signal processing software of the manufacturer 
(which we do not have access to). However, the noise features can 
be easily identified and removed manually from the Doppler spectra.
This was carried out for the calculation of the reflectivity profiles
directly from the spectra for the aircraft overpasses (...fdbz.dat-files,
see index.html). The spectra themselves (fft.dat-files) may still 
contain artifacts, therefore, their analysis and interpretation should
be carried out carefully. 

Please note that the pulse-pair data (dbz.dat- and vel.dat-files,
which contain most of all the data) are NOT affected and should be ok!!

For any further questions, please contact Olaf Danne at
GKSS (danne@gkss.de).

Olaf Danne, 18 March 1999