PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-10:27:50
G01     60.7           30.2                2.2 +/-    0.37       3.9 +/-    0.37  0.040 / 0.060
G07     140.9          22.4                4.0 +/-    0.69       8.3 +/-    0.69  0.040 / 0.050
G11     49.4           27.0                1.8 +/-    1.14       3.3 +/-    1.14  0.080 / 0.160
G13     263.4          36.9                5.8 +/-    1.22       8.8 +/-    1.22  0.080 / 0.150
G15     296.1          15.9                3.9 +/-    2.86       9.6 +/-    2.86  0.030 / 0.040
G17     246.8          73.2                5.3 +/-    0.62       5.5 +/-    0.62  0.030 / 0.030
G18     42.8           13.7                0.6 +/-    1.09       1.5 +/-    1.09  0.070 / 0.120
G19     229.9          51.1                6.3 +/-    0.98       7.9 +/-    0.98  0.060 / 0.130
G28     19.3           60.2                3.2 +/-    0.82       3.6 +/-    0.82  0.050 / 0.060
G30     142.9          56.0                4.0 +/-    0.64       4.8 +/-    0.64  0.070 / 0.050