PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-19:58:10
G01     68.4           32.7               13.4 +/-    0.81      22.2 +/-    0.81  0.100 / 0.350
G07     138.6          29.6               13.3 +/-    1.07      23.5 +/-    1.07  0.090 / 0.420
G11     52.9           30.1               12.6 +/-    1.12      22.0 +/-    1.12  0.050 / 0.090
G13     272.1          37.2               14.3 +/-    1.10      21.8 +/-    1.10  0.040 / 0.070
G15     301.1          15.5                8.2 +/-    1.51      20.1 +/-    1.51  0.060 / 0.140
G17     235.6          67.3               13.8 +/-    0.58      14.9 +/-    0.58  0.070 / 0.160
G18     47.7           17.4               10.3 +/-    0.77      24.2 +/-    0.77  0.030 / 0.060
G19     225.8          42.5               14.5 +/-    1.57      20.2 +/-    1.57  0.040 / 0.050
G28     23.7           58.7               12.9 +/-    0.32      14.8 +/-    0.32  0.060 / 0.120
G30     137.5          58.8               12.9 +/-    0.69      14.8 +/-    0.69  0.060 / 0.120