PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-16:57:40
G07     318.8          53.6               10.0 +/-    0.79      12.2 +/-    0.79  0.050 / 0.050
G08     121.5          43.9               12.5 +/-    0.81      17.1 +/-    0.81  0.060 / 0.050
G09     287.5          81.1                8.7 +/-    0.30       8.8 +/-    0.30  0.050 / 0.060
G16     42.5           23.7                7.3 +/-    2.24      14.8 +/-    2.24  0.060 / 0.060
G23     147.7          59.2               12.9 +/-    0.52      14.7 +/-    0.52  0.030 / 0.030
G27     75.7           37.7               10.8 +/-    0.76      16.3 +/-    0.76  0.040 / 0.030
G28     225.8          12.2                7.1 +/-   15.75      18.7 +/-   15.75  0.250 / 0.470
G30     289.9          26.1                9.0 +/-    1.56      17.2 +/-    1.56  0.200 / 0.360