PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-07:12:30
G07     11.2           67.4                5.3 +/-    0.47       5.6 +/-    0.47  0.030 / 0.040
G08     71.4           51.4                6.1 +/-    1.19       7.5 +/-    1.19  0.030 / 0.040
G09     178.9          53.1                7.7 +/-    0.61       9.4 +/-    0.61  0.110 / 0.290
G11     134.8          25.7                6.5 +/-    2.93      12.5 +/-    2.93  0.120 / 0.190
G23     159.2          22.2                5.4 +/-    2.85      11.2 +/-    2.85  0.050 / 0.040
G27     42.4           20.3                4.1 +/-    2.60       8.8 +/-    2.60  0.040 / 0.050
G28     250.1          36.2                7.1 +/-    1.29      11.0 +/-    1.29  0.050 / 0.060
G30     315.2          46.4                3.8 +/-    0.91       5.0 +/-    0.91  0.060 / 0.050