PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-18:12:50
G07     60.7           66.8               11.6 +/-    0.57      12.5 +/-    0.57  0.040 / 0.030
G08     52.4           41.1               10.1 +/-    0.96      14.4 +/-    0.96  0.030 / 0.030
G09     179.3          40.5               12.7 +/-    0.71      18.3 +/-    0.71  0.150 / 0.170
G11     119.9          34.4               12.8 +/-    0.59      20.6 +/-    0.59  0.090 / 0.130
G17     199.0          12.5               11.5 +/-    2.81      30.4 +/-    2.81  0.030 / 0.040
G18     104.1          15.2               12.1 +/-    1.56      30.0 +/-    1.56  0.040 / 0.030
G23     160.6          10.3               12.3 +/-    2.16      33.9 +/-    2.16  0.220 / 0.290
G27     37.9           10.9                9.4 +/-    2.34      25.7 +/-    2.34  0.220 / 0.220
G28     267.4          47.7               12.2 +/-    2.54      15.8 +/-    2.54  0.110 / 0.310
G30     331.7          59.7               10.8 +/-    0.60      12.3 +/-    0.60  0.100 / 0.390