PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-16:42:30
G07     339.3          60.2                9.9 +/-    0.37      11.2 +/-    0.37  0.040 / 0.040
G08     94.9           53.5               10.9 +/-    0.71      13.2 +/-    0.71  0.040 / 0.040
G09     186.7          68.8               11.0 +/-    0.45      11.7 +/-    0.45  0.090 / 0.100
G11     143.6          15.9               13.4 +/-    3.47      32.7 +/-    3.47  0.080 / 0.110
G23     155.4          32.3               10.4 +/-    1.20      17.4 +/-    1.20  0.030 / 0.040
G27     50.7           28.8                9.0 +/-    1.74      16.2 +/-    1.74  0.030 / 0.040
G28     241.4          33.4                9.8 +/-    1.50      16.1 +/-    1.50  0.110 / 0.140
G30     306.3          39.0                9.8 +/-    1.17      14.5 +/-    1.17  0.100 / 0.160