PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/30-21:42:50
G02     213.5          57.2               13.2 +/-    0.55      15.4 +/-    0.55  0.060 / 0.090
G06     65.3           75.9               11.6 +/-    0.57      11.9 +/-    0.57  0.090 / 0.070
G12     317.9          34.3                9.2 +/-    1.94      14.8 +/-    1.94  0.060 / 0.080
G17     53.3           36.4               10.0 +/-    1.59      15.5 +/-    1.59  0.070 / 0.070
G19     33.4           52.6               11.1 +/-    1.07      13.6 +/-    1.07  0.030 / 0.030
G24     269.1          42.2               12.2 +/-    2.04      17.1 +/-    2.04  0.030 / 0.020
G28     120.6          15.8               13.2 +/-    1.98      32.3 +/-    1.98  0.050 / 0.050