PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-10:58:10
G07     335.5          59.3                5.0 +/-    0.62       5.7 +/-    0.62  0.030 / 0.030
G08     108.0          51.3                6.7 +/-    0.70       8.4 +/-    0.70  0.030 / 0.040
G09     198.2          76.9                6.2 +/-    0.56       6.4 +/-    0.56  0.060 / 0.070
G11     147.2          12.5                4.8 +/-    1.67      12.8 +/-    1.67  0.050 / 0.070
G23     153.1          39.8                6.0 +/-    0.92       8.8 +/-    0.92  0.110 / 0.320
G27     58.3           33.3                4.2 +/-    0.93       6.9 +/-    0.93  0.240 / 0.380
G28     233.8          21.9                4.6 +/-    1.83       9.8 +/-    1.83  0.030 / 0.020
G30     300.7          34.7                4.3 +/-    1.77       6.8 +/-    1.77  0.030 / 0.020