PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-02:12:40
G01     41.8           17.2                3.6 +/-    1.86       8.6 +/-    1.86  0.040 / 0.050
G06     176.6          36.7                5.7 +/-    1.12       8.8 +/-    1.12  0.040 / 0.060
G13     239.3          22.7                6.0 +/-    2.13      12.3 +/-    2.13  0.170 / 0.240
G15     271.2          12.8                3.5 +/-    1.17       9.1 +/-    1.17  0.210 / 0.170
G17     353.2          72.3                4.5 +/-    0.45       4.7 +/-    0.45  0.060 / 0.090
G19     275.0          68.7                4.3 +/-    0.56       4.6 +/-    0.56  0.070 / 0.110
G24     317.2          17.8                1.8 +/-    5.42       4.2 +/-    5.42  0.020 / 0.030
G28     70.9           46.9                4.7 +/-    1.08       6.2 +/-    1.08  0.020 / 0.030
G30     153.2          25.1                5.9 +/-    2.07      11.6 +/-    2.07  0.370 / 0.180