4
HydSN_0015 0000.0000 0085.7036 0083.2345 0091.4272 
HydSN_0376 0085.7036 0000.0000 0071.9779 0088.9310 
HydSN_0816 0083.2345 0071.9779 0000.0000 0068.6014 
HydSN_1030 0091.4272 0088.9310 0068.6014 0000.0000