PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/12-17:28:00
G03     239.5          70.5               10.9 +/-    1.02      11.5 +/-    1.02  0.040 / 0.040
G09     300.2          13.7               10.2 +/-    2.37      26.2 +/-    2.37  0.060 / 0.040
G14     95.1           19.4                9.3 +/-    1.13      20.7 +/-    1.13  0.130 / 0.290
G16     134.5          55.3               12.1 +/-    0.36      14.3 +/-    0.36  0.110 / 0.330
G22     194.9          59.0               11.5 +/-    0.49      13.2 +/-    0.49  0.030 / 0.050
G23     317.2          47.3                9.7 +/-    1.83      12.7 +/-    1.83  0.030 / 0.040
G31     50.1           22.3                7.8 +/-    2.42      16.2 +/-    2.42  0.160 / 0.270