PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-10:12:50
G01     56.1           28.4                3.0 +/-    1.40       5.3 +/-    1.40  0.140 / 0.200
G07     142.8          18.5                4.1 +/-    2.01       9.5 +/-    2.01  0.110 / 0.140
G11     47.4           23.6                3.1 +/-    1.39       6.3 +/-    1.39  0.030 / 0.030
G13     258.0          35.2                7.7 +/-    1.43      12.1 +/-    1.43  0.020 / 0.030
G15     291.6          16.2                4.8 +/-    2.09      11.6 +/-    2.09  0.080 / 0.060
G17     262.3          76.5                6.0 +/-    0.36       6.2 +/-    0.36  0.070 / 0.110
G18     40.2           10.9                2.4 +/-    2.96       6.7 +/-    2.96  0.250 / 0.340
G19     234.8          55.1                5.4 +/-    2.13       6.4 +/-    2.13  0.090 / 0.310
G28     27.2           59.4                4.6 +/-    0.84       5.3 +/-    0.84  0.040 / 0.050
G30     146.0          51.7                6.4 +/-    0.89       7.9 +/-    0.89  0.040 / 0.050