Questions addressed in this theme include:

- What is the accuracy of low-power X-band dual-polarization based rain and DSD estimation in heavy rainfall and complex terrain settings?
- What improvement in rain estimation is obtainable from locally deployed low power X-POL systems relative to operational radar networks?
- What is the impact of the increased resolution and potentially improved estimation accuracy on the modeling of small scale basin flood response?

The validation of X-band radar rainfall retrieval over following complex terrain;

**SCOP-ME**

The microphysical algorithm (named SCOP-ME, Kalogiros et al. 2014) Is a self-consistent polarimetric algorithm, based on the parametrizations of the specific attenuation coefficients and backscattering phase shift in rain, derived by Kalogiros et al. (2013a), and applied with an iterative scheme to separate radar rays (Kalogiros et al. 2013b).

**Researchers:**

**References:**

[1] Anagnostou., M. N., J. Kalogiros, E. Nikolopoulos, Y. Derin, E. N. Anagnostou, and M. Borga, 2016: Satellite Rainfall Error Analysis with the Use of High-Resolution X-Band Dual-Polarization Radar Observations Over the Italian Alps, Perspectives on Atmospheric Sciences, Springer Atmospheric Sciences, DOI 10.1007/978-3-319-35095-0_39

[2] Anagnostou, M. N., John Kalogiros, Frank S. Marzano, Emmanouil N. Anagnostou, Mario Montopoli, and Errico Picciotti, 2013: Performance evaluation of a new dual-polarization microphysical algorithm based on long-term X-band radar and disdrometer observations, *J. Hydrometeor.* **14,** 560 – 576.

[3] Kalogiros, J., M. N. Anagnostou, E. N. Anagnostou, M. Montopoli, E. Picciotti, and F. S. Marzano, 2013a: Optimum estimation of rain microphysical parameters using X-band dual-polarization radar observables. *IEEE Trans. Geosci. Remote Sens.*, **51**, 3063–3076.

[4] Kalogiros, J., M. N. Anagnostou, E. N. Anagnostou, M. Montopoli, E. Picciotti, and F. S. Marzano, 2013b: Correction of Polarimetric Radar Reflectivity Measurements and Rainfall Estimates for Apparent Vertical Profile in Stratiform Rain. *J. Appl. Meteorol. Climatol.*, **52**, 1170–1186.

[5] Kalogiros, J., M. N. Anagnostou, E. N. Anagnostou, M. Montopoli, E. Picciotti, and F. S. Marzano, 2014: Evaluation of anew polarimetric algorithm for rain-path attenuation correction of X-band radar observations against disdrometer. *IEEE Trans. Geosci. Remote Sens., ***52, **1369-1380.