PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-19:12:50
G01     320.8          11.6               -2.1 +/-   33.65      -5.6 +/-   33.65  0.170 / 0.310
G08     264.4          16.6                9.5 +/-    2.77      22.6 +/-    2.77  0.220 / 0.430
G10     66.4           57.5                6.8 +/-    0.56       7.9 +/-    0.56  0.140 / 0.320
G11     309.7          18.7                7.7 +/-    1.36      17.6 +/-    1.36  0.130 / 0.300
G14     275.5          68.0                7.3 +/-    0.73       7.8 +/-    0.73  0.030 / 0.030
G18     95.9           32.6                8.8 +/-    0.95      14.7 +/-    0.95  0.020 / 0.030
G27     228.2          13.3               11.9 +/-    2.87      30.8 +/-    2.87  0.070 / 0.120
G31     179.0          32.4                9.8 +/-    2.40      16.3 +/-    2.40  0.060 / 0.080
G32     346.3          72.6                6.5 +/-    0.47       6.7 +/-    0.47  0.030 / 0.030