PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-03:12:40
G01     66.0           32.2                4.5 +/-    0.53       7.5 +/-    0.53  0.060 / 0.130
G07     139.7          27.3                7.4 +/-    1.42      13.7 +/-    1.42  0.060 / 0.150
G11     52.2           29.3                4.4 +/-    1.80       7.9 +/-    1.80  0.040 / 0.090
G13     270.4          36.5                5.5 +/-    1.02       8.5 +/-    1.02  0.050 / 0.060
G15     298.1          16.4                3.8 +/-    1.26       9.2 +/-    1.26  0.090 / 0.260
G17     242.1          71.9                6.5 +/-    0.45       6.8 +/-    0.45  0.080 / 0.280
G19     227.8          46.6                7.6 +/-    1.20      10.0 +/-    1.20  0.020 / 0.030
G28     28.0           57.9                2.9 +/-    0.67       3.4 +/-    0.67  0.040 / 0.030
G30     138.8          53.9                7.5 +/-    0.56       9.0 +/-    0.56  0.050 / 0.100