Title: CloudNet: TARA status and database
1CloudNetTARA status and database
- H. Russchenberg , O. Krasnov Delft University of
Technology IRCTR, The Netherlands
2TARA current status
- It is working
- Starting August 18, 2004
1 hour
1 hour
1 min
1 min
1 min
RAW data 1 ms sweeps
0.512 sec moments of Doppler spectrum Z, V,
WCalibrated, net CDF format
Range resolution 30 m Doppler velocity 22
m/sec
CLOUDNET product 30 sec averaged Z,V,W
dataafter application cloud mask
33D wind mode for TARA
B0 - Fullpolarimetrybeam
November - December 2004, first experimental
campaign
B1 - One polarizationbeam
15
5 x 1-msec sweeps sequence B0HH B0HV B0VV
B1 B2 repeats N times to formDoppler spectra
in all channels
15
B2 - One polarizationbeam
- Output
- Standard products as it is now
- 3D wind field
- Polarimetric information
4TARA database status
2002
2003
2004
2005
January
January
31
February
February
4...
March
March
April
April
May
May
June
June
July
July
August
August
September
25
September
October
3
October
November
27
November
December
Total
298
Total
34(?)
On KNMI CloudNet FTP server
5LWC retrievals using radar - lidar algorithm
- NetCDF
- YYYYMMDD_site_LWC_Radar_lidar_method.nc
- Common variables - time, height, latitude,
longitude, altitude, radar frequency, global
attributes. - 2D arrays
- optical extinction,
- radar reflectivity to optical extinction ratio
- Time series of lidars optical depth
- Retrievals
- Used for retrieval Z/? and Z thresholds,
- 2D liquid water categorization map and LWC array,
- time series of retrieved LWP (for the different
Z-LWC relations)
6- liquid_water_map_bits
- Bit 0 - Reading's categorization product
recognized pixel as water ((small droplets OR
water precipitation) AND Temperature gt 0C) - Bit 1 - radar signal presented
- Bit 2 - lidar signal (extinction) presented
- Bit 3 - radar reflectivity to lidar extinction
presented - Bit 4 - atmospheric water, class 1 - "water cloud
without drizzle" - Bit 5 - atmospheric water, class 2 - "water cloud
with light drizzle" - Bit 6 - atmospheric water, class 3 - "water cloud
with heavy drizzle"
7May 19, 2003, Cabauw
8May 19, 2003, Cabauw
9May 19, 2003, Cabauw
10May 19, 2003, Cabauw