PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-02:27:50
G01     68.2           32.6                2.8 +/-    0.94       4.7 +/-    0.94  0.130 / 0.320
G07     138.7          29.1                4.4 +/-    1.46       7.9 +/-    1.46  0.090 / 0.340
G11     53.7           31.0                2.5 +/-    1.24       4.3 +/-    1.24  0.030 / 0.050
G13     272.7          36.9                5.2 +/-    0.88       8.0 +/-    0.88  0.030 / 0.060
G15     299.9          16.2                2.3 +/-    2.02       5.6 +/-    2.02  0.040 / 0.040
G17     237.5          69.9                4.4 +/-    0.75       4.6 +/-    0.75  0.040 / 0.040
G19     226.1          44.7                7.9 +/-    1.48      10.7 +/-    1.48  0.040 / 0.090
G28     24.7           58.5                1.6 +/-    0.20       1.8 +/-    0.20  0.050 / 0.070
G30     137.2          55.2                3.6 +/-    1.45       4.2 +/-    1.45  0.050 / 0.100