PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/07-12:42:50
G02     201.3          26.2                5.3 +/-    2.40      10.0 +/-    2.40  0.160 / 0.130
G06     170.5          59.1                7.1 +/-    0.83       8.2 +/-    0.83  0.130 / 0.110
G17     31.0           53.4                3.9 +/-    0.77       4.8 +/-    0.77  0.050 / 0.120
G19     347.4          68.9                3.4 +/-    0.67       3.6 +/-    0.67  0.040 / 0.130
G24     307.0          32.3                4.3 +/-    1.42       7.2 +/-    1.42  0.060 / 0.040
G28     95.0           35.7                3.7 +/-    0.69       5.8 +/-    0.69  0.050 / 0.040