PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-23:57:40
G02     213.2          58.2               12.4 +/-    0.83      14.3 +/-    0.83  0.080 / 0.110
G06     67.1           76.7               10.0 +/-    0.45      10.2 +/-    0.45  0.110 / 0.090
G12     317.5          33.2                8.2 +/-    1.34      13.5 +/-    1.34  0.140 / 0.300
G17     52.1           37.8               10.5 +/-    1.45      15.9 +/-    1.45  0.150 / 0.320
G19     34.4           52.0               10.8 +/-    1.93      13.3 +/-    1.93  0.030 / 0.020
G24     269.7          42.1               12.4 +/-    2.16      17.4 +/-    2.16  0.030 / 0.030
G28     120.7          15.6               14.0 +/-    1.32      34.4 +/-    1.32  0.060 / 0.070