Case 4: Input Receiver Samples

This is the most comprehensive case of polarization operation, since it permits calculation of all of the polarization measurands. In this case, the transmitter alternates pulse-to-pulse between horizontal and vertical polarization, and the dual-channel receiver provides measurement of both the co- and the cross-polarized return as follows:

[ S h h 1 : S v h 1 ] [ S v v 2 : S h v 2 ] [ S h h 3 : S h v 3 ] ⋯ [ S v v M+1 : S h v M+1 ]

We assume that M+1 samples are collected for processing (an extra sample is required for the calculation Rb as in Case 3: Alternating H/V Transmit: Single Receiver).