PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-07:58:00
G07     48.0           69.2                6.5 +/-    0.37       6.9 +/-    0.37  0.040 / 0.040
G08     54.9           44.2                4.4 +/-    0.89       6.0 +/-    0.89  0.040 / 0.040
G09     177.5          39.1                9.1 +/-    1.12      13.5 +/-    1.12  0.030 / 0.030
G11     123.4          34.3                8.0 +/-    0.97      12.9 +/-    0.97  0.020 / 0.040
G13     321.3          10.2               -9.0 +/-    7.82     -25.0 +/-    7.82  0.130 / 0.720
G18     106.0          15.0                6.3 +/-    0.98      15.5 +/-    0.98  0.070 / 0.070
G28     264.5          45.0                7.0 +/-    1.17       9.5 +/-    1.17  0.050 / 0.070
G30     327.0          56.7                4.4 +/-    0.88       5.2 +/-    0.88  0.040 / 0.060