PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-13:28:10
G02     213.8          52.0                8.5 +/-    1.73      10.5 +/-    1.73  0.040 / 0.100
G06     70.2           76.9                4.7 +/-    0.69       4.8 +/-    0.69  0.060 / 0.110
G12     317.8          34.7                4.6 +/-    1.41       7.4 +/-    1.41  0.040 / 0.070
G17     54.8           33.6                4.0 +/-    0.83       6.4 +/-    0.83  0.050 / 0.060
G19     28.0           55.2                5.1 +/-    0.90       6.1 +/-    0.90  0.030 / 0.030
G24     267.6          43.1                3.3 +/-    0.95       4.6 +/-    0.95  0.030 / 0.030
G28     119.3          17.8                7.1 +/-    1.70      16.5 +/-    1.70  0.030 / 0.040