PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-16:57:50
G01     64.6           31.9                8.6 +/-    1.47      14.5 +/-    1.47  0.120 / 0.200
G07     140.4          26.3               11.5 +/-    1.45      21.8 +/-    1.45  0.080 / 0.200
G11     50.3           26.8                7.4 +/-    1.92      13.9 +/-    1.92  0.040 / 0.040
G13     267.5          36.6               11.2 +/-    1.52      17.2 +/-    1.52  0.040 / 0.030
G15     299.4          15.3                8.2 +/-    1.25      20.3 +/-    1.25  0.060 / 0.110
G17     244.5          72.5               11.5 +/-    0.31      12.0 +/-    0.31  0.060 / 0.130
G18     45.0           15.3                8.9 +/-    2.10      22.0 +/-    2.10  0.020 / 0.030
G19     228.4          44.5               12.2 +/-    1.79      16.6 +/-    1.79  0.030 / 0.040
G28     28.9           57.9               11.6 +/-    0.74      13.4 +/-    0.74  0.070 / 0.130
G30     140.7          56.8               11.7 +/-    0.54      13.6 +/-    0.54  0.100 / 0.090