PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/30-18:12:40
G03     189.1          20.7               11.5 +/-    1.75      24.8 +/-    1.75  0.090 / 0.150
G07     287.9          35.8               13.0 +/-    1.27      20.4 +/-    1.27  0.110 / 0.150
G08     147.2          24.6               13.8 +/-    1.90      27.2 +/-    1.90  0.020 / 0.030
G09     320.4          59.8               12.3 +/-    1.59      14.0 +/-    1.59  0.020 / 0.030
G16     43.3           40.1               10.9 +/-    0.82      15.9 +/-    0.82  0.090 / 0.120
G23     112.4          77.6               11.3 +/-    0.81      11.5 +/-    0.81  0.080 / 0.090
G26     43.3           11.9               10.1 +/-    1.67      27.1 +/-    1.67  0.090 / 0.250
G27     101.1          32.9               13.1 +/-    0.71      21.6 +/-    0.71  0.110 / 0.320
G30     273.0          13.4               12.5 +/-    6.06      32.3 +/-    6.06  0.170 / 0.290