PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-08:57:50
G07     335.2          59.2                4.6 +/-    0.88       5.2 +/-    0.88  0.040 / 0.070
G08     109.5          51.8                6.3 +/-    0.48       7.8 +/-    0.48  0.040 / 0.080
G09     193.6          75.6                4.0 +/-    0.60       4.2 +/-    0.60  0.110 / 0.250
G11     147.2          12.9                2.9 +/-    3.11       7.5 +/-    3.11  0.090 / 0.290
G23     153.9          40.6                6.6 +/-    0.69       9.5 +/-    0.69  0.080 / 0.490
G27     57.2           32.7                3.5 +/-    0.35       5.7 +/-    0.35  0.080 / 0.470
G28     234.3          22.0                6.2 +/-    0.79      12.9 +/-    0.79  0.050 / 0.050
G30     300.5          34.0                5.1 +/-    2.10       8.2 +/-    2.10  0.040 / 0.050