Fig. 5 shows calculated ND between 2011/04 (post) and 2010/11
(pre) pairs for each polarimetric parameter. Here, additional polarimetric
parameters, such as the co-polarization coherence in the linear HVpolarization
basis (ρHHVV) and circular-polarization basis (ρRRLL) and the
polarimetric orientation angle (θPO), are also examined. The polarization
coherence at linear (HV) or circular (RL) polarization basis is defined as