International Research Centre for Telecommunications and Radar High resolution atmospheric profiling with the S-band Doppler polarimetric radar TARA Christine.

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International Research Centre for Telecommunications and Radar High resolution atmospheric profiling with the S-band Doppler polarimetric radar TARA Christine Unal, Marta Girame Ibanez, Yann Dufournet and Herman Russchenberg Delft University of Technology, The Netherlands  TARA type of measurement  Near vertical wind profiling mode  First comparisons of TARA wind profiling with radiosondes

International Research Centre for Telecommunications and Radar Hornisgrinde (site H) TARA (Transportable Atmospheric Radar) wavelength = 9.1 cm 1 s < time resolution < 10 s 3 m< height resolution< 30 m can simultaneously measure  dynamics (wind profiling with 3 beams)  microphysics (polarimetry) of precipitation, ice clouds, mixed-phased clouds and clear air scattering 4.5 Tb of raw data

International Research Centre for Telecommunications and Radar Measurement configuration 3 beams  3 mean Doppler velocities  horizontal wind + vertical wind MB VV HV HH OB1 OB2 measurement sequence time

International Research Centre for Telecommunications and Radar Radiosondes comparison Sites H and M About 30 mn time difference 2.5 m/s 1.3 m/s 6.5 deg deg.

International Research Centre for Telecommunications and Radar IOP-5a: reflectivity and horizontal wind

International Research Centre for Telecommunications and Radar Comparison of TARA horizontal wind with radiosonde H Standard deviation (radar measurement of 3 mn) Wind speed: from 1 m/s (cloud) to 2 m/s (rain) Wind direction: from 2 deg. (cloud) to 5 deg. (rain) Differences of the order of 5 m/s and 25 deg. between TARA and radiosonde H

International Research Centre for Telecommunications and Radar IOP-5a: horizontal wind and vertical velocity (zoom on 6 mn) heterogeneity

International Research Centre for Telecommunications and Radar IOP-8b: reflectivity and 3D wind

International Research Centre for Telecommunications and Radar Comparison of TARA horizontal wind with radiosondes Compared to precipitation, clear air scattering has a low signal-to-noise ratio and less data for the averaging period Differences of the order of 5 m/s and 90 deg. between TARA and radiosonde H

International Research Centre for Telecommunications and Radar IOP-8b: 3D wind (zoom on 30 mn) turbulence

International Research Centre for Telecommunications and Radar Status  atmosphere dynamics  evaluation of TARA wind estimates - different meteorological conditions - accuracy - COPS user needs  atmosphere microphysics  research on mixed-phased clouds (Yann Dufournet)  problems with TARA during COPS  data quality ok (raw data) but a part of the processing is thus not automatic  study cases will be selected

International Research Centre for Telecommunications and Radar IOP-5a: 3 time series of mean Doppler velocities

International Research Centre for Telecommunications and Radar IOP-8b: 3 time series of mean Doppler velocities