PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-12:28:00
G07     336.0          59.5                5.2 +/-    0.92       5.9 +/-    0.92  0.040 / 0.050
G08     107.0          51.0                6.9 +/-    0.66       8.6 +/-    0.66  0.040 / 0.050
G09     201.1          77.5                5.4 +/-    1.11       5.5 +/-    1.11  0.090 / 0.260
G11     147.2          12.2                5.0 +/-    1.37      13.3 +/-    1.37  0.100 / 0.220
G23     153.4          41.6                7.8 +/-    0.85      11.1 +/-    0.85  0.090 / 0.350
G27     58.9           33.7                4.5 +/-    0.39       7.4 +/-    0.39  0.140 / 0.390
G28     233.6          21.9                6.6 +/-    1.39      13.8 +/-    1.39  0.040 / 0.070
G30     301.0          35.4                6.5 +/-    0.95      10.3 +/-    0.95  0.060 / 0.090