begin{table}[ht]
begin{ruledtabular}
begin{tabular}{c|c|c|c|c!{color{black}vrule width 1.5pt}c!{color{black}vrule width 1.5pt}c}
Cline{6-6}
multicolumn{2}{l| }{Nb of harmonics} &1 &2 &3 &4 &Tot.\


hline
multirow{2}{1.8cm}{Mean ($^circ$)}& Azi. & 20.3 & 8.2 & 4.6 & 3.8 & 16.3\
cline{2-7}

    & Elev. & 8.3 & 4.5 & 3.8 & 3.6 & 3.7 \

 hline

multirow{2}{1.8cm}{Std dev. ($^circ$)} & Azi. & 35 & 18.3 & 9.9 & 6.7 & 40.7\

cline{2-7}

 & Elev. & 8.7 & 5.6 & 3.7 & 2.9 & 5.8\
Cline{6-6}

end{tabular}
end{ruledtabular}

end{table}