# Remote Sensing of Snow Cover Using Spaceborne SAR: A Review
## 6 Conclusions
\begin{table}
\begin{tabular}{l l l l l l l} \hline
**Decomposition** & **Parameter** & **Wet and Dry Snow Response** & **Total Snow Response** & **Employed by Studies** & **Used for Final Classification** \\
**Type** & & & & & & & \\ \hline Backscattering & \(B_{tot},B_{UV}\) & & & & & \\  & \(B_{tot},B_{UV}\) & & & & & \\  & & \(P_{tot}\) single/odd & & & & & \\  & & bounce, & & & & & \\ Pauli decomposition & Cloude and Potter & \(P_{tot}\) double/even & & Low \(P_{tot}\) and \(P_{tot}\) & [30,35,163,165,167-169] & \(P_{tot}\)[163] & All [174] \\
[160] & 1996 & bounce, & [169] & 169] & All [174] & \\  & & \(P_{tot}\) volume & & & & \\  & & scattering & & & & \\ \hline  & & H entropy & Low \(\lambda_{3}\) for wet snow & & & \\  & & A anisotropy & [30] & Low H and H(1-A) & & & \\ H/A/F & Cloude and Potter & \(\overline{\lambda}\) angle & Low \(\overline{\lambda}\) for wet snow & [30] & [30,35,118,143,163, 34] & \(\lambda_{3}\)[163, 246] & \(\lambda_{3}\)[191] \\
[160] & 1996 & \(\lambda_{1},\lambda_{2},\lambda_{3}\) & High H for wet snow & Low H, \(\overline{\lambda}\)[251] & 165,167,169,171,272, 24,191,211,246,251, & H/A[163,246] & \(\overline{\lambda}\)[163,169,211] \\  & & 1+H & High H for wet snow & High A [30] & 174,191,211,246,251, & H/A[168,211] \\  & & H(1-A) & [35] & & & \\ \hline Freeman & Freeman and Durden & \(F_{tot}\) surface, & & & & \\ \([253]\) & 1998 & \(F_{tot}\) volume & & & & \\  & & scattering & & & & \\ \hline Yamaguchi & Yamaguchi et al. & \(Y_{tot}\) surface & & & & \\ \([254]\) & 2006 & \(Y_{tot}\) double-source, & & & & \\  & & \(Y_{tot}\) volume & & & & \\  & & scattering & & & & \\  & & \(P_{tot},P_{tot},P_{tot},P_{tot}\) & & & \\ \hline Touzi [255] & Touzi 2007 & \(\begin{array}{l}\text{$\frac{1}{10}$},\text{$\frac{1}{10}$},\text{$\frac{1}{10}$} \\ \text{$\frac{1}{10}$},\text{$\frac{1}{10}$},\text{$\frac{1}{10}$}\\ \text{$\frac{1}{10}$},\text{$\frac{1}{10}$},\text{$\frac{1}{10}$}\\ \text{$\frac{1}{10}$},\text{$\frac{1}{10}$},\text{$\frac{1}{10}$}\\ \text{$\frac{1}{10}$},\text{$\frac{1}{10}$}\end{array}\) & & & & \\ \hline \([256]\) & [PERSON] et al. 2011 & Generalized volume & & & \\  & scattering & & & & \\ \hline [PERSON] [257] & [PERSON] et al. 2015 & Kennaugh elements & Low \(K_{0}\) for wet snow & & \\  & & \(K_{1}-K_{0}\) & [209] & \(K_{0}\)[209] & \\ \hline \end{tabular}
\end{table} 
Table 3: The PoSAR decomposition techniques and parameters employed in the included studies. \begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline
**Decomposition Type** & **Parameter** & **Wet and Dry Snow Response** & **Total Snow Response** & **Employed by Studies** & **Used for Final Classification** & \\ \hline Derived parameter & & Total power (TP) & Low TP [251] & [251] & & \\ \hline [PERSON] et al. & [PERSON] et al. 1987 & Polarization fraction (FP) [258] & High PF for wet snow [118] & High PF [251] & [30,118,171,251] & [30,118,171] & [30,118,171] \\ \hline [PERSON] et al. 2002 & [PERSON] et al. 2002 & Polarimetric asymmetry (PA) [259] & High PA [30] & [30] & \\ \hline Lineburg 2001 & Lineburg (LA) [26] & Lineburg anisotropy (LA) [26] & Low LA [30] & [30] & \\ \hline [PERSON] et al. 2006 & \begin{tabular}{p{113.8 pt}} single-bounce \\ eigenvalue relative \\ diffuse (BRD) double-bounce \\ eigenvalue relative \\ diffrence (BRD) \\ \end{tabular} & High SERD when & & & \\ \hline \begin{tabular}{p{113.8 pt}} [PERSON] and Potter \\ 2009 \\ \end{tabular} & \
\begin{tabular}{p{113.8 pt}} Copolarization \\ Coherence [262] \\ \end{tabular} & & [30] & \\ \hline [PERSON] and [PERSON] 2009 &
\begin{tabular}{p{113.8 pt}} polarimetric \\ depolarization phase (PPD) [262] \\ \end{tabular} & & [30] & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: _Cont._