PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-07:57:50
G01     66.6           32.2                4.7 +/-    0.71       7.9 +/-    0.71  0.040 / 0.040
G07     139.3          26.8                7.2 +/-    1.72      13.4 +/-    1.72  0.040 / 0.050
G11     51.5           27.7                2.9 +/-    2.76       5.4 +/-    2.76  0.060 / 0.110
G13     271.8          36.5                4.6 +/-    1.46       7.2 +/-    1.46  0.060 / 0.110
G15     299.3          16.1                2.7 +/-    2.93       6.6 +/-    2.93  0.030 / 0.020
G17     242.9          73.7                6.8 +/-    0.27       7.0 +/-    0.27  0.030 / 0.020
G19     227.3          46.9                5.7 +/-    2.64       7.5 +/-    2.64  0.130 / 0.240
G28     26.9           58.1                6.1 +/-    1.31       7.1 +/-    1.31  0.120 / 0.250
G30     138.4          57.7                8.0 +/-    0.58       9.3 +/-    0.58  0.070 / 0.060