PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-11:27:40
G01     39.6           14.3                2.5 +/-    3.18       6.3 +/-    3.18  0.080 / 0.250
G06     173.0          40.8                5.3 +/-    1.00       7.6 +/-    1.00  0.200 / 0.250
G13     235.3          21.9                4.8 +/-    1.72      10.1 +/-    1.72  0.030 / 0.030
G15     270.4          11.7                5.1 +/-    1.67      13.8 +/-    1.67  0.030 / 0.030
G17     358.3          71.1                4.5 +/-    1.67       4.8 +/-    1.67  0.040 / 0.040
G19     284.1          71.2                3.7 +/-    1.21       3.9 +/-    1.21  0.040 / 0.030
G24     316.4          18.9                2.2 +/-    1.69       5.1 +/-    1.69  0.060 / 0.090
G28     65.4           51.7                3.9 +/-    1.14       4.9 +/-    1.14  0.070 / 0.070
G30     155.4          28.0                4.5 +/-    1.13       8.2 +/-    1.13  0.040 / 0.060