PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-15:57:50
G01     220.3          10.9               10.2 +/-    1.68      28.0 +/-    1.68  0.170 / 0.270
G03     248.3          71.1               10.4 +/-    0.45      11.0 +/-    0.45  0.120 / 0.230
G09     299.2          12.6                7.8 +/-    2.49      20.5 +/-    2.49  0.060 / 0.070
G14     93.2           21.2                7.6 +/-    1.09      16.1 +/-    1.09  0.050 / 0.060
G16     136.0          53.9               12.6 +/-    0.56      15.2 +/-    0.56  0.170 / 0.430
G22     194.4          60.0               11.3 +/-    0.68      12.8 +/-    0.68  0.160 / 0.360
G23     316.6          46.9                9.1 +/-    0.71      11.9 +/-    0.71  0.040 / 0.050
G26     78.3           53.1               10.0 +/-    1.11      12.1 +/-    1.11  0.040 / 0.050
G31     49.4           23.3                6.5 +/-    3.07      13.3 +/-    3.07  0.040 / 0.040