1. TARA data for CloudNet
H. Russchenberg , O. Krasnov Delft University of Technology – IRCTR, The Netherlands

2. TARA FM-CW: Frequency Modulated – Continuous Wave Radar T R
Transmitted Power
DR ~ DT ~ DF Z
Frequency T R DF T
Range FFT DT
Tsweep

3. Doppler processing
Z(V)
Vmax
-Vmax V
Doppler FFT
512 profiles (512 x Tsweep)
Profiles of Z, V, W every s

4. 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

5. 0.512 s data

6. netCDF files
0.512 sec (RAW) Z, V, W (as short), CloudMask, all available radar info, calibration, etc. size 605,828,352 bytes (gzip -> MB)
30 sec CloudNet Z, V, W after application of the cloud mask and averaging size 17,711,088 byte (gzip -> MB)

7. On CloudNet KNMI Server:
2004 – until ;
~280 days
2002 – Sept.-Dec. (soon)

8. Calibration and recalibration
Thanks to Nicolas Gaussiat

10. Original data – as it is now:
Original data – as it is now:

11. Recalibrated dara

13. Original data – as it is now
Original data – as it is now

14. Recalibrated data