PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-18:12:50
G02     212.3          52.7                5.1 +/-    9.38       6.2 +/-    9.38  0.060 / 0.140
G06     72.9           76.9                1.1 +/-    9.86       1.2 +/-    9.86  0.050 / 0.100
G12     317.6          34.2                9.4 +/-    2.13      15.2 +/-    2.13  0.060 / 0.080
G17     52.7           35.9                1.5 +/-   10.39       2.3 +/-   10.39  0.060 / 0.090
G19     28.5           55.0                0.7 +/-   10.82       0.8 +/-   10.82  0.040 / 0.070
G24     271.5          42.8                2.0 +/-   11.06       2.8 +/-   11.06  0.070 / 0.070
G28     118.7          17.9                8.0 +/-   10.56      18.4 +/-   10.56  0.140 / 0.410