Comments on "The specular null polarization theory" [with reply]

J.C. Hubbert and V.N. Bringi have recently published two papers concerning radar specular null polarisation for coherent and incoherent backscatter, see ibid., vol.32, p.658-71 (1994) and ibid., vol.34, p.859-73 (1995). They claimed to have introduced a new polarisation theory comparable to Kennaugh polarisation theory (KPT). They have also introduced the optical backscattering term "optical polarisation theory". The present authors discuss the first authors work for the coherent case. The present authors claim that Hubbert et al. have two misconceptions about KPT. They believe KPT is a combination of backscattering behaviour and radar network performance and that a recast of the voltage equation would change the transformation of the Sinclair matrix.