\begin{equation*}{{\rm{\Phi }}_s} = \left( {\begin{array}{@{}c@{\;\;}c@{\;\;}c@{\;\;}c@{\;\;}c@{\;\;}c@{\;\;}c@{\;\;}c@{}} {var( {{b_{s0}}} )}&{cov( {{b_{s0}},{b_{s1}}} )}&{cov( {{b_{s0}},{b_{s2}}} )}&{cov( {{b_{s0}},{b_{s3}}} )}&{cov( {{b_{s0}},{b_{s4}}} )}&{cov( {{b_{s0}},{b_{s5}}} )}&{cov( {{b_{s0}},{b_{s6}}} )}&{cov( {{b_{s0}},{b_{s7}}} )}\\
{cov( {{b_{s1}},{b_{s0}}} )}&{var( {{b_{s1}}} )}&{cov( {{b_{s1}},{b_{s2}}} )}&{cov( {{b_{s1}},{b_{s3}}} )}&{cov( {{b_{s1}},{b_{s4}}} )}&{cov( {{b_{s1}},{b_{s5}}} )}&{cov( {{b_{s1}},{b_{s6}}} )}&{cov( {{b_{s1}},{b_{s7}}} )}\\
{cov( {{b_{s2}},{b_{s0}}} )}&{cov( {{b_{s2}},{b_{s1}},} )}&{var( {{b_{s2}}} )}&{cov( {{b_{s2}},{b_{s3}}} )}&{cov( {{b_{s2}},{b_{s4}}} )}&{cov( {{b_{s2}},{b_{s5}}} )}&{cov( {{b_{s2}},{b_{s6}}} )}&{cov( {{b_{s2}},{b_{s7}}} )}\\
{cov( {{b_{s3}},{b_{s0}}} )}&{cov( {{b_{s3}},{b_{s1}}} )}&{cov( {{b_{s3}},{b_{s2}}} )}&{var( {{b_{s3}}} )}&{cov( {{b_{s3}},{b_{s4}}} )}&{cov( {{b_{s3}},{b_{s5}}} )}&{cov( {{b_{s3}},{b_{s6}}} )}&{cov( {{b_{s3}},{b_{s7}}} )}\\
{cov( {{b_{s4}},{b_{s0}}} )}&{cov( {{b_{s4}},{b_{s1}}} )}&{cov( {{b_{s4}},{b_{s2}}} )}&{cov( {{b_{s4}},{b_{s3}}} )}&{var( {{b_{s4}}} )}&{cov( {{b_{s4}},{b_{s5}}} )}&{cov( {{b_{s4}},{b_{s6}}} )}&{cov( {{b_{s4}},{b_{s7}}} )}\\
{cov( {{b_{s5}},{b_{s0}}} )}&{cov( {{b_{s5}},{b_{s1}}} )}&{cov( {{b_{s5}},{b_{s2}}} )}&{cov( {{b_{s5}},{b_{s3}}} )}&{cov( {{b_{s5}},{b_{s4}}} )}&{var( {{b_{s5}}} )}&{cov( {{b_{s5}},{b_{s6}}} )}&{cov( {{b_{s5}},{b_{s7}}} )}\\
{cov( {{b_{s6}},{b_{s0}}} )}&{cov( {{b_{s6}},{b_{s1}}} )}&{cov( {{b_{s6}},{b_{s2}}} )}&{cov( {{b_{s6}},{b_{s3}}} )}&{cov( {{b_{s6}},{b_{s4}}} )}&{cov( {{b_{s6}},{b_{s5}}} )}&{var( {{b_{s6}}} )}&{cov( {{b_{s6}},{b_{s7}}} )}\\
{cov( {{b_{s7}},{b_{s0}}} )}&{cov( {{b_{s7}},{b_{s1}}} )}&{cov( {{b_{s7}},{b_{s2}}} )}&{cov( {{b_{s7}},{b_{s3}}} )}&{cov( {{b_{s7}},{b_{s4}}} )}&{cov( {{b_{s7}},{b_{s5}}} )}&{cov( {{b_{s7}},{b_{s6}}} )}&{var( {{b_{s7}}} )} \end{array}} \right)\end{equation*}