PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-20:57:50
G01     123.5          14.6               14.9 +/-    2.21      37.4 +/-    2.21  0.150 / 0.070
G07     65.0           68.9               12.0 +/-    0.40      12.8 +/-    0.40  0.140 / 0.080
G08     49.5           40.1               10.2 +/-    0.92      14.7 +/-    0.92  0.230 / 0.310
G09     178.3          32.2               14.3 +/-    0.57      24.0 +/-    0.57  0.180 / 0.300
G11     116.1          37.3               14.4 +/-    1.17      21.8 +/-    1.17  0.180 / 0.190
G13     320.0          14.8               10.4 +/-    3.53      26.0 +/-    3.53  0.150 / 0.210
G17     201.8          16.0               18.7 +/-    3.54      45.5 +/-    3.54  0.040 / 0.040
G18     100.2          18.6               11.8 +/-    1.87      26.9 +/-    1.87  0.060 / 0.030
G28     284.3          55.4               13.0 +/-    2.45      15.4 +/-    2.45  0.080 / 0.070
G30     343.3          66.1               12.2 +/-    0.83      13.2 +/-    0.83  0.080 / 0.090