PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-17:27:40
G07     13.8           68.0               13.5 +/-    0.59      14.4 +/-    0.59  0.060 / 0.040
G08     66.2           50.3               14.2 +/-    1.09      17.8 +/-    1.09  0.060 / 0.050
G09     180.1          50.1               15.1 +/-    0.60      19.0 +/-    0.60  0.060 / 0.050
G11     131.5          27.0               12.8 +/-    1.56      23.9 +/-    1.56  0.050 / 0.050
G18     115.2          10.0                0.2 +/-   28.83       0.5 +/-   28.83  0.040 / 0.030
G23     158.4          15.5               13.7 +/-    1.58      33.8 +/-    1.58  0.030 / 0.030
G27     40.5           17.0               10.6 +/-    2.07      25.0 +/-    2.07  0.100 / 0.090
G28     258.9          45.5               13.5 +/-    1.77      18.0 +/-    1.77  0.080 / 0.100
G30     321.0          51.2               11.9 +/-    0.78      14.8 +/-    0.78  0.190 / 0.470