PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-04:28:10
G02     216.2          63.4                6.5 +/-    0.91       7.2 +/-    0.91  0.040 / 0.080
G06     58.2           75.9                5.1 +/-    0.67       5.2 +/-    0.67  0.030 / 0.080
G12     318.6          35.6                4.2 +/-    1.91       6.5 +/-    1.91  0.040 / 0.030
G17     57.3           33.2                2.3 +/-    0.47       3.7 +/-    0.47  0.040 / 0.020
G19     41.0           48.3                4.3 +/-    0.87       5.5 +/-    0.87  0.050 / 0.090
G24     265.1          41.2                5.7 +/-    1.07       8.1 +/-    1.07  0.060 / 0.110
G28     123.6          12.3                5.8 +/-    2.97      15.3 +/-    2.97  0.180 / 0.540