PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/11-07:28:00
G02     202.4          30.0                6.8 +/-    2.12      11.9 +/-    2.12  0.030 / 0.040
G06     166.7          63.8                9.3 +/-    1.14      10.3 +/-    1.14  0.040 / 0.040
G12     305.0          12.0                2.1 +/-    3.92       5.6 +/-    3.92  0.160 / 0.250
G17     34.8           49.9                4.0 +/-    0.89       5.0 +/-    0.89  0.190 / 0.260
G19     345.2          68.1                4.4 +/-    0.53       4.7 +/-    0.53  0.050 / 0.100
G24     298.0          39.5                4.5 +/-    0.98       6.6 +/-    0.98  0.070 / 0.080
G28     97.3           35.5                7.1 +/-    0.69      11.2 +/-    0.69  0.050 / 0.130