PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-03:57:50
G02     200.0          26.0                4.6 +/-    2.21       8.8 +/-    2.21  0.060 / 0.090
G06     172.7          55.7                5.3 +/-    0.42       6.3 +/-    0.42  0.070 / 0.080
G13     225.5          10.9                4.3 +/-    2.52      11.8 +/-    2.52  0.030 / 0.030
G17     24.0           58.2                3.1 +/-    0.77       3.6 +/-    0.77  0.040 / 0.030
G19     335.6          70.1                2.2 +/-    0.33       2.3 +/-    0.33  0.040 / 0.040
G24     308.3          31.2                1.9 +/-    1.61       3.3 +/-    1.61  0.030 / 0.060
G28     92.3           37.2                5.4 +/-    1.40       8.2 +/-    1.40  0.220 / 0.430