PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-11:57:40
G02     201.1          19.9                4.4 +/-    1.83       9.7 +/-    1.83  0.050 / 0.090
G06     168.1          55.8                6.1 +/-    0.62       7.2 +/-    0.62  0.050 / 0.100
G13     225.0          12.7                1.5 +/-    7.34       4.1 +/-    7.34  0.110 / 0.150
G17     20.1           60.6                3.8 +/-    0.67       4.2 +/-    0.67  0.080 / 0.140
G19     332.6          71.1                3.9 +/-    0.80       4.1 +/-    0.80  0.040 / 0.050
G24     309.7          29.2                2.2 +/-    1.79       4.0 +/-    1.79  0.030 / 0.050
G28     83.8           45.0                3.0 +/-    0.77       4.1 +/-    0.77  0.110 / 0.690
G30     157.8          14.8                4.3 +/-    1.66      10.8 +/-    1.66  0.090 / 0.540