TARA data for CloudNet - Cloudnet Home Page

TARA data for CloudNet H. Russchenberg , O. Krasnov Delft University of Technology IRCTR, The Netherlands TARA FM-CW: Frequency Modulated Continuous Wave Radar T R

Transmitted Power R ~ T ~ F Z Frequency T R

F T Range FFT T Tsweep

Doppler processing Z(V) Vmax -Vmax V

Doppler FFT 512 profiles (512 x Tsweep) 512 Z m0 zi i 1 Profiles of Z, V, W every 0.512 s 512

512 zv i i v m1 i 1

m0 z v i W m2 i

i 1 m0 v 2

Cloud mask 1. Cloud mask =1 for pixels with: -40 dBZ < reflectivity < +40 dBZ, and -10 m/s < velocity < 5 m/s, and 0 m/s < width < 3 m/s 2. Moving average of the cloud mask with 5 x 5 window and removing points with values less then 0.44

At least 11 pixels of cloud mask have to filled 0.512 s data netCDF files 0.512 sec (RAW) Z, V, W (as short), CloudMask, all available radar info, calibration,

etc. size 605,828,352 bytes (gzip -> 100-250 MB) 30 sec CloudNet Z, V, W after application of the cloud mask and averaging size 17,711,088 byte (gzip -> 1.5-3 MB) On CloudNet KNMI Server:

2004 until 11.03.2004; 2003 - ~280 days 2002 Sept.-Dec. (soon) Calibration and recalibration Thanks to Nicolas Gaussiat 15.01.2004 Original data as it is now:

15.01.2004 Recalibrated dara 18.01.2004 Original data as it is now 18.01.2004 Recalibrated data