PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-15:58:00
G02     201.1          21.4                9.1 +/-    2.99      19.3 +/-    2.99  0.050 / 0.030
G06     168.6          56.5               10.5 +/-    0.49      12.4 +/-    0.49  0.040 / 0.040
G13     224.3          11.8                7.4 +/-    2.37      20.0 +/-    2.37  0.090 / 0.130
G17     20.0           60.5                7.5 +/-    0.83       8.5 +/-    0.83  0.080 / 0.150
G19     334.6          70.7                8.0 +/-    0.48       8.4 +/-    0.48  0.050 / 0.080
G24     308.4          30.7                6.4 +/-    1.73      11.1 +/-    1.73  0.050 / 0.080
G28     86.1           43.4                9.1 +/-    1.17      12.5 +/-    1.17  0.040 / 0.040
G30     157.0          11.6               10.2 +/-    1.93      27.4 +/-    1.93  0.040 / 0.040