PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-14:57:40
G01     61.1           30.9                8.6 +/-    1.16      14.7 +/-    1.16  0.050 / 0.040
G07     141.8          23.2               11.2 +/-    1.96      22.9 +/-    1.96  0.050 / 0.040
G11     48.3           23.8                8.7 +/-    2.39      17.4 +/-    2.39  0.080 / 0.100
G13     263.4          35.7               11.1 +/-    1.37      17.4 +/-    1.37  0.100 / 0.120
G15     297.5          15.1                5.0 +/-    1.53      12.4 +/-    1.53  0.050 / 0.080
G17     256.7          76.3               12.5 +/-    0.38      12.8 +/-    0.38  0.050 / 0.070
G18     42.7           13.2                7.7 +/-    1.59      20.0 +/-    1.59  0.090 / 0.120
G19     231.0          46.6               11.5 +/-    2.59      15.2 +/-    2.59  0.070 / 0.110
G28     33.9           57.0               11.2 +/-    1.14      13.0 +/-    1.14  0.080 / 0.140
G30     143.3          54.5               11.2 +/-    0.61      13.4 +/-    0.61  0.350 / 0.240