PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-18:58:10
G08     272.3          19.8                8.9 +/-    1.61      19.7 +/-    1.61  0.100 / 0.210
G10     50.6           60.6               10.0 +/-    0.74      11.3 +/-    0.74  0.120 / 0.220
G11     314.9          13.5               10.1 +/-    2.60      25.9 +/-    2.60  0.110 / 0.250
G14     257.2          63.2               11.2 +/-    0.84      12.4 +/-    0.84  0.110 / 0.250
G18     88.1           37.9               10.1 +/-    0.39      15.2 +/-    0.39  0.030 / 0.030
G21     152.0          14.8                8.7 +/-    2.64      21.8 +/-    2.64  0.030 / 0.030
G24     42.4           14.6                7.9 +/-    1.60      19.9 +/-    1.60  0.050 / 0.060
G27     234.4          18.8               11.1 +/-    1.65      25.2 +/-    1.65  0.040 / 0.050
G31     180.5          24.0               11.1 +/-    0.91      22.3 +/-    0.91  0.140 / 0.320
G32     315.6          75.6               11.2 +/-    0.62      11.5 +/-    0.62  0.160 / 0.360