CAX1 Dual-Pol Attenuation Correction (DPATC)
Post-processing performed on dBZ parameter using the Rainbow ZPHI_ITER_DEFAULT.dpatc module

Reference (copied with SELEX permission):
•	RB5_ProductsAlgorithms_5430.DPATC_n_REFERENCE.pdf
o	9.5 DPATC – Dual-Pol based Attenuation Correction (pp.312-318)
o	13 References (pp 475-479)

Copy of DPATC parameter file, ZPHI_ITER_DEFAULT.dpatc,
<ppdf version="5.43.11" datetime="2017-08-11T18:08:55" type="dpatc">
   <unitid>SI</unitid>
   <general>
      <corr_dbz>IZPHI</corr_dbz>
      <corr_zdr>AhScaled</corr_zdr>
      <corr_all>true</corr_all>
      <use_file>false</use_file>
      <file/>
      <h0>1</h0>
   </general>
   <dbz_correction>
      <alpha_mode>Auto</alpha_mode>
      <alpha>0.08</alpha>
      <b>0.74</b>
      <phidp_thresh>30</phidp_thresh>
   </dbz_correction>
   <zdr_correction>
      <beta_mode>Auto</beta_mode>
      <beta>0.02</beta>
      <optimize_beta>true</optimize_beta>
      <gamma_mode>OptimizedBeta</gamma_mode>
      <gamma>0.25</gamma>
   </zdr_correction>
</ppdf>

Rainbow setup tabs associated with ZPHI_ITER_DEFAULT.dpatc,

DPATC – General

DPATC – dBZ Correction

Before and after example,

Note: no limitation of DPATC for below the freezing level, re: radial distance.