PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-02:42:50
G01     85.0           32.8                5.3 +/-    1.09       8.7 +/-    1.09  0.060 / 0.060
G07     129.3          41.7                5.9 +/-    1.14       8.4 +/-    1.14  0.040 / 0.060
G11     65.8           39.0                3.4 +/-    0.41       5.0 +/-    0.41  0.050 / 0.100
G13     290.4          36.5                4.4 +/-    1.70       6.9 +/-    1.70  0.050 / 0.090
G15     311.6          12.4                2.6 +/-    2.01       6.9 +/-    2.01  0.040 / 0.040
G17     218.4          57.3                6.2 +/-    0.56       7.2 +/-    0.56  0.030 / 0.040
G19     216.8          31.8                7.3 +/-    1.36      12.3 +/-    1.36  0.040 / 0.070
G28     359.2          61.2                2.3 +/-    0.77       2.6 +/-    0.77  0.040 / 0.070
G30     119.0          68.8                4.1 +/-    0.63       4.4 +/-    0.63  0.120 / 0.250