PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-13:57:40
G07     39.9           68.4                7.9 +/-    0.53       8.4 +/-    0.53  0.030 / 0.040
G08     60.3           47.2                5.6 +/-    0.54       7.3 +/-    0.54  0.030 / 0.040
G09     180.1          47.1                9.5 +/-    1.46      12.5 +/-    1.46  0.080 / 0.130
G11     126.6          30.7                7.4 +/-    0.53      12.7 +/-    0.53  0.060 / 0.110
G18     110.3          12.1                7.3 +/-    2.92      19.4 +/-    2.92  0.080 / 0.140
G23     159.4          13.8                8.8 +/-    2.04      22.5 +/-    2.04  0.080 / 0.190
G27     39.5           15.3                6.9 +/-    1.25      17.0 +/-    1.25  0.110 / 0.300
G28     259.0          42.9                6.6 +/-    1.10       9.2 +/-    1.10  0.110 / 0.290
G30     326.3          55.8                6.2 +/-    0.60       7.4 +/-    0.60  0.170 / 0.310